Articles | Volume 22, issue 12
https://doi.org/10.5194/acp-22-7959-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-7959-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Continental thunderstorm ground enhancement observed at an exceptionally low altitude
Institute of Atmospheric Physics, Czech Academy of Sciences,
Prague, Czechia
Faculty of Mathematics and Physics, Charles University, Prague,
Czechia
Ondřej Santolík
Institute of Atmospheric Physics, Czech Academy of Sciences,
Prague, Czechia
Faculty of Mathematics and Physics, Charles University, Prague,
Czechia
Jakub Šlegl
Nuclear Physics Institute, Czech Academy of Sciences,
Husinec-Řež, Czechia
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czechia
Jana Popová
Institute of Atmospheric Physics, Czech Academy of Sciences,
Prague, Czechia
Zbyněk Sokol
Institute of Atmospheric Physics, Czech Academy of Sciences,
Prague, Czechia
Petr Zacharov
Institute of Atmospheric Physics, Czech Academy of Sciences,
Prague, Czechia
Ondřej Ploc
Nuclear Physics Institute, Czech Academy of Sciences,
Husinec-Řež, Czechia
Gerhard Diendorfer
Department of ALDIS, OVE Service GmbH, Vienna, Austria
Ronald Langer
Institute of Experimental Physics, Slovak Academy of Sciences,
Košice, Slovakia
Nuclear Physics Institute, Czech Academy of Sciences,
Husinec-Řež, Czechia
Radek Lán
Institute of Atmospheric Physics, Czech Academy of Sciences,
Prague, Czechia
Igor Strhárský
Institute of Experimental Physics, Slovak Academy of Sciences,
Košice, Slovakia
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Jaroslav Chum, Ronald Langer, Ivana Kolmašová, Ondřej Lhotka, Jan Rusz, and Igor Strhárský
EGUsphere, https://doi.org/10.5194/egusphere-2023-2124, https://doi.org/10.5194/egusphere-2023-2124, 2023
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It is important for our society to understand man-made and natural climate impacts impacts, including lightning. This paper shows that although local weather and climate play a dominant role on lightning occurrence, lightning frequency can be partially modulated by solar activity. Cosmic rays do not contribute to the global occurrence of lightning because they are not positively correlated in most regions. This does not rule out the possibility that they help to ignite individual lightning.
Ivana Kolmašová, Ondřej Santolík, and Kateřina Rosická
Atmos. Chem. Phys., 22, 3379–3389, https://doi.org/10.5194/acp-22-3379-2022, https://doi.org/10.5194/acp-22-3379-2022, 2022
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The 2014–2015 winter brought an enormous number of lightning strokes to northern Europe, about 4 times more than their long-term median over the last decade. This unusual production of lightning, concentrated above the ocean and along the western coastal areas, was probably due to a combination of large-scale climatic events like El Niño and the North Atlantic Oscillation, causing increased sea surface temperatures and updraft strengths, which acted as additional thundercloud-charging drivers.
Jaroslav Chum, Ronald Langer, Ivana Kolmašová, Ondřej Lhotka, Jan Rusz, and Igor Strhárský
EGUsphere, https://doi.org/10.5194/egusphere-2023-2124, https://doi.org/10.5194/egusphere-2023-2124, 2023
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It is important for our society to understand man-made and natural climate impacts impacts, including lightning. This paper shows that although local weather and climate play a dominant role on lightning occurrence, lightning frequency can be partially modulated by solar activity. Cosmic rays do not contribute to the global occurrence of lightning because they are not positively correlated in most regions. This does not rule out the possibility that they help to ignite individual lightning.
Jakub Kákona, Jan Mikeš, Iva Ambrožová, Ondřej Ploc, Olena Velychko, Lembit Sihver, and Martin Kákona
Atmos. Meas. Tech., 16, 547–561, https://doi.org/10.5194/amt-16-547-2023, https://doi.org/10.5194/amt-16-547-2023, 2023
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Storm activity is sometimes associated with the generation of ionizing radiation. Our motivation for performing this research was to understand its origin. Using measuring cars fitted with new instruments, it was found that the duration of lightning is longer than generally thought. In most cases, lightning occurs only inside the cloud; however, rarely, it is also visible outside the cloud. In such cases, the course of emission over time can be used to assume what it looks like inside the cloud.
Ivana Kolmašová, Ondřej Santolík, and Kateřina Rosická
Atmos. Chem. Phys., 22, 3379–3389, https://doi.org/10.5194/acp-22-3379-2022, https://doi.org/10.5194/acp-22-3379-2022, 2022
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The 2014–2015 winter brought an enormous number of lightning strokes to northern Europe, about 4 times more than their long-term median over the last decade. This unusual production of lightning, concentrated above the ocean and along the western coastal areas, was probably due to a combination of large-scale climatic events like El Niño and the North Atlantic Oscillation, causing increased sea surface temperatures and updraft strengths, which acted as additional thundercloud-charging drivers.
Thorsten Simon, Nikolaus Umlauf, Achim Zeileis, Georg J. Mayr, Wolfgang Schulz, and Gerhard Diendorfer
Nat. Hazards Earth Syst. Sci., 17, 305–314, https://doi.org/10.5194/nhess-17-305-2017, https://doi.org/10.5194/nhess-17-305-2017, 2017
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The study presents a newly developed statistical method to assess the risk of thunderstorms in complex terrain. Observations of lightning serve as an indicator for thunderstorms. The application of the method is illustrated for Carinthia which is located in Austria, Europe.
Wolfgang Schulz, Gerhard Diendorfer, Stéphane Pedeboy, and Dieter Roel Poelman
Nat. Hazards Earth Syst. Sci., 16, 595–605, https://doi.org/10.5194/nhess-16-595-2016, https://doi.org/10.5194/nhess-16-595-2016, 2016
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In this paper, we present a performance analysis of the European lightning location system EUCLID for cloud-to-ground flashes/strokes in terms of location accuracy, detection efficiency and peak current estimation. The performance analysis is based on ground truth data from direct lightning current measurements at the Gaisberg Tower and data from E-field and video recordings.
Dieter Roel Poelman, Wolfgang Schulz, Gerhard Diendorfer, and Marina Bernardi
Nat. Hazards Earth Syst. Sci., 16, 607–616, https://doi.org/10.5194/nhess-16-607-2016, https://doi.org/10.5194/nhess-16-607-2016, 2016
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Cloud-to-ground lightning data from the EUCLID network over the period 2006–2014 are explored. Mean flash densities vary over the European continent, with the highest density found at the intersection of the borders of Austria, Italy and Slovenia. The majority of lightning activity takes place between May and September, while the diurnal cycle peaks around 15:00 UTC. In addition, it is found that flashes with higher peak currents occur in greater proportion over sea than over land.
Related subject area
Subject: Clouds and Precipitation | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
Supercooled liquid water clouds observed over Dome C, Antarctica: temperature sensitivity and cloud radiative forcing
Role of thermodynamic and turbulence processes on the fog life cycle during SOFOG3D experiment
Thermodynamic and cloud evolution in a cold air outbreak during HALO-(AC)3: Quasi-Lagrangian observations compared to the ERA5 and CARRA reanalyses
Characterizing the near-global cloud vertical structures over land using high-resolution radiosonde measurements
Powering aircraft with 100% sustainable aviation fuel reduces ice crystals in contrails
Differences in microphysical properties of cirrus at high and mid-latitudes
Sub-cloud rain evaporation in the North Atlantic winter trade winds derived by pairing isotopic data with a bin-resolved microphysical model
Overview and statistical analysis of boundary layer clouds and precipitation over the western North Atlantic Ocean
A set of methods to evaluate the below-cloud evaporation effect on local precipitation isotopic composition: a case study for Xi'an, China
Earth-system-model evaluation of cloud and precipitation occurrence for supercooled and warm clouds over the Southern Ocean's Macquarie Island
Pollution slightly enhances atmospheric cooling by low-level clouds in tropical West Africa
Investigating an indirect aviation effect on mid-latitude cirrus clouds – linking lidar-derived optical properties to in situ measurements
Investigating the vertical extent and short-wave radiative effects of the ice phase in Arctic summertime low-level clouds
Microphysical and thermodynamic phase analyses of Arctic low-level clouds measured above the sea ice and the open ocean in spring and summer
Aircraft observations of gravity wave activity and turbulence in the tropical tropopause layer: prevalence, influence on cirrus clouds, and comparison with global storm-resolving models
Influence of air mass origin on microphysical properties of low-level clouds in a subarctic environment
Sensitivity of convectively driven tropical tropopause cirrus properties to ice habits in high-resolution simulations
Upper-tropospheric slightly ice-subsaturated regions: frequency of occurrence and statistical evidence for the appearance of contrail cirrus
Examination of aerosol indirect effects during cirrus cloud evolution
In situ microphysics observations of intense pyroconvection from a large wildfire
Conditions favorable for secondary ice production in Arctic mixed-phase clouds
Interaction between cloud–radiation, atmospheric dynamics and thermodynamics based on observational data from GoAmazon 2014/15 and a cloud-resolving model
Snowfall in Northern Finland derives mostly from ice clouds
Observation of secondary ice production in clouds at low temperatures
In situ and satellite-based estimates of cloud properties and aerosol–cloud interactions over the southeast Atlantic Ocean
Ice fog observed at cirrus temperatures at Dome C, Antarctic Plateau
Life cycle of stratocumulus clouds over 1 year at the coast of the Atacama Desert
Experimental study on the evolution of droplet size distribution during the fog life cycle
Significant continental source of ice-nucleating particles at the tip of Chile's southernmost Patagonia region
Retrieving ice-nucleating particle concentration and ice multiplication factors using active remote sensing validated by in situ observations
Temporal and vertical distributions of the occurrence of cirrus clouds over a coastal station in the Indian monsoon region
Ice-nucleating particles from multiple aerosol sources in the urban environment of Beijing under mixed-phase cloud conditions
In situ observation of riming in mixed-phase clouds using the PHIPS probe
Measurement report: Introduction to the HyICE-2018 campaign for measurements of ice-nucleating particles and instrument inter-comparison in the Hyytiälä boreal forest
North Atlantic Ocean SST-gradient-driven variations in aerosol and cloud evolution along Lagrangian cold-air outbreak trajectories
Factors affecting precipitation formation and precipitation susceptibility of marine stratocumulus with variable above- and below-cloud aerosol concentrations over the Southeast Atlantic
An assessment of macrophysical and microphysical cloud properties driving radiative forcing of shallow trade-wind clouds
High concentrations of ice crystals in upper-tropospheric tropical clouds: is there a link to biomass and fossil fuel combustion?
Atmospheric rivers and associated precipitation patterns during the ACLOUD and PASCAL campaigns near Svalbard (May–June 2017): case studies using observations, reanalyses, and a regional climate model
Mass of different snow crystal shapes derived from fall speed measurements
Measurement report: Impact of African aerosol particles on cloud evolution in a tropical montane cloud forest in the Caribbean
Annual exposure to polycyclic aromatic hydrocarbons in urban environments linked to wintertime wood-burning episodes
Reduced ice number concentrations in contrails from low-aromatic biofuel blends
Distinct impacts on precipitation by aerosol radiative effect over three different megacity regions of eastern China
Estimation of the terms acting on local 1 h surface temperature variations in Paris region: the specific contribution of clouds
Contrasting characteristics of open- and closed-cellular stratocumulus cloud in the eastern North Atlantic
Mass and density of individual frozen hydrometeors
Linear relationship between effective radius and precipitation water content near the top of convective clouds: measurement results from ACRIDICON–CHUVA campaign
Supercooled liquid water and secondary ice production in Kelvin–Helmholtz instability as revealed by radar Doppler spectra observations
Morning boundary layer conditions for shallow to deep convective cloud evolution during the dry season in the central Amazon
Philippe Ricaud, Massimo Del Guasta, Angelo Lupi, Romain Roehrig, Eric Bazile, Pierre Durand, Jean-Luc Attié, Alessia Nicosia, and Paolo Grigioni
Atmos. Chem. Phys., 24, 613–630, https://doi.org/10.5194/acp-24-613-2024, https://doi.org/10.5194/acp-24-613-2024, 2024
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Clouds affect the Earth's climate in ways that depend on the type of cloud (solid/liquid water). From observations at Concordia (Antarctica), we show that in supercooled liquid water (liquid water for temperatures below 0°C) clouds (SLWCs), temperature and SLWC radiative forcing increase with liquid water (up to 70 W m−2). We extrapolated that the maximum SLWC radiative forcing can reach 40 W m−2 over the Antarctic Peninsula, highlighting the importance of SLWCs for global climate prediction.
Cheikh Dione, Martial Haeffelin, Frédéric Burnet, Christine Lac, Guylaine Canut, Julien Delanoë, Jean-Charles Dupont, Susana Jorquera, Pauline Martinet, Jean-François Ribaud, and Felipe Toledo
Atmos. Chem. Phys., 23, 15711–15731, https://doi.org/10.5194/acp-23-15711-2023, https://doi.org/10.5194/acp-23-15711-2023, 2023
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This paper documents the role of thermodynamics and turbulence in the fog life cycle over southwestern France. It is based on a unique dataset collected during the SOFOG3D field campaign in autumn and winter 2019–2020. The paper gives a threshold for turbulence driving the different phases of the fog life cycle and the role of advection in the night-time dissipation of fog. The results can be operationalised to nowcast fog and improve short-range forecasts in numerical weather prediction models.
Benjamin Kirbus, Imke Schirmacher, Marcus Klingebiel, Michael Schäfer, André Ehrlich, Nils Slättberg, Johannes Lucke, Manuel Moser, Hanno Müller, and Manfred Wendisch
EGUsphere, https://doi.org/10.5194/egusphere-2023-2989, https://doi.org/10.5194/egusphere-2023-2989, 2023
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A research aircraft is used to track the changes in air temperature, moisture, and cloud properties for air that moves from cold Arctic sea ice onto warmer oceanic waters. The measurements are compared to two reanalysis models named ERA5 and CARRA. The biggest differences are found for air temperature over the sea ice and moisture over the ocean. CARRA data is more accurate than ERA5 because it better simulates the sea ice, the transition from sea ice to open ocean, and the forming clouds.
Hui Xu, Jianping Guo, Bing Tong, Jinqiang Zhang, Tianmeng Chen, Xiaoran Guo, Jian Zhang, and Wenqing Chen
Atmos. Chem. Phys., 23, 15011–15038, https://doi.org/10.5194/acp-23-15011-2023, https://doi.org/10.5194/acp-23-15011-2023, 2023
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The radiative effect of cloud remains one of the largest uncertain factors in climate change, largely due to the lack of cloud vertical structure (CVS) observations. The study presents the first near-global CVS climatology using high-vertical-resolution soundings. Single-layer cloud mainly occurs over arid regions. As the number of cloud layers increases, clouds tend to have lower bases and thinner layer thicknesses. The occurrence frequency of cloud exhibits a pronounced seasonal diurnal cycle.
Raphael Satoru Märkl, Christiane Voigt, Daniel Sauer, Rebecca Katharina Dischl, Stefan Kaufmann, Theresa Harlaß, Valerian Hahn, Anke Roiger, Cornelius Weiß-Rehm, Ulrike Burkhardt, Ulrich Schumann, Andreas Marsing, Monika Scheibe, Andreas Dörnbrack, Charles Renard, Maxime Gauthier, Peter Swann, Paul Madden, Darren Luff, Reetu Sallinen, Tobias Schripp, and Patrick Le Clercq
EGUsphere, https://doi.org/10.5194/egusphere-2023-2638, https://doi.org/10.5194/egusphere-2023-2638, 2023
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In situ measurements of contrails from a large passenger aircraft burning 100 % sustainable aviation fuel (SAF) show a 56 % reduction in contrail ice crystal numbers compared to conventional Jet A-1. Results from a climate model initialized with the observations suggest a significant decrease in radiative forcing from contrails. Our study confirms that a future increased use of low aromatic SAF can reduce the climate impact from aviation.
Elena De La Torre Castro, Tina Jurkat-Witschas, Armin Afchine, Volker Grewe, Valerian Hahn, Simon Kirschler, Martina Krämer, Johannes Lucke, Nicole Spelten, Heini Wernli, Martin Zöger, and Christiane Voigt
Atmos. Chem. Phys., 23, 13167–13189, https://doi.org/10.5194/acp-23-13167-2023, https://doi.org/10.5194/acp-23-13167-2023, 2023
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In this study, we show the differences in the microphysical properties between high-latitude (HL) cirrus and mid-latitude (ML) cirrus over the Arctic, North Atlantic, and central Europe during summer. The in situ measurements are combined with backward trajectories to investigate the influence of the region on cloud formation. We show that HL cirrus are characterized by a lower concentration of larger ice crystals when compared to ML cirrus.
Mampi Sarkar, Adriana Bailey, Peter Blossey, Simon P. de Szoeke, David Noone, Estefanía Quiñones Meléndez, Mason D. Leandro, and Patrick Y. Chuang
Atmos. Chem. Phys., 23, 12671–12690, https://doi.org/10.5194/acp-23-12671-2023, https://doi.org/10.5194/acp-23-12671-2023, 2023
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We study rain evaporation characteristics below shallow cumulus clouds over the North Atlantic Ocean by pairing isotope observations with a microphysical model. The modeled fraction of rain mass that evaporates below the cloud strongly depends on the raindrop size and distribution width. Moreover, the higher the rain mass fraction evaporated, the greater the change in deuterium excess. In this way, rain evaporation could be studied independently using only isotope and microphysical observations.
Simon Kirschler, Christiane Voigt, Bruce E. Anderson, Gao Chen, Ewan C. Crosbie, Richard A. Ferrare, Valerian Hahn, Johnathan W. Hair, Stefan Kaufmann, Richard H. Moore, David Painemal, Claire E. Robinson, Kevin J. Sanchez, Amy J. Scarino, Taylor J. Shingler, Michael A. Shook, Kenneth L. Thornhill, Edward L. Winstead, Luke D. Ziemba, and Armin Sorooshian
Atmos. Chem. Phys., 23, 10731–10750, https://doi.org/10.5194/acp-23-10731-2023, https://doi.org/10.5194/acp-23-10731-2023, 2023
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In this study we present an overview of liquid and mixed-phase clouds and precipitation in the marine boundary layer over the western North Atlantic Ocean. We compare microphysical properties of pure liquid clouds to mixed-phase clouds and show that the initiation of the ice phase in mixed-phase clouds promotes precipitation. The observational data presented in this study are well suited for investigating the processes that give rise to liquid and mixed-phase clouds, ice, and precipitation.
Meng Xing, Weiguo Liu, Jing Hu, and Zheng Wang
Atmos. Chem. Phys., 23, 9123–9136, https://doi.org/10.5194/acp-23-9123-2023, https://doi.org/10.5194/acp-23-9123-2023, 2023
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The below-cloud evaporation effect (BCE) on precipitation largely impacts the final isotopic composition. However, determining the BCE effect remains poorly constrained. Our work used a ΔdΔδ diagram to differentiate the below-cloud processes. Moreover, by comparing two different computing methods, we considered that both methods are suitable for evaluation the BCE, except for snowfall events. Overall, our work compiled a set of effective methods to evaluate the BCE effect.
McKenna W. Stanford, Ann M. Fridlind, Israel Silber, Andrew S. Ackerman, Greg Cesana, Johannes Mülmenstädt, Alain Protat, Simon Alexander, and Adrian McDonald
Atmos. Chem. Phys., 23, 9037–9069, https://doi.org/10.5194/acp-23-9037-2023, https://doi.org/10.5194/acp-23-9037-2023, 2023
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Clouds play an important role in the Earth’s climate system as they modulate the amount of radiation that either reaches the surface or is reflected back to space. This study demonstrates an approach to robustly evaluate surface-based observations against a large-scale model. We find that the large-scale model precipitates too infrequently relative to observations, contrary to literature documentation suggesting otherwise based on satellite measurements.
Valerian Hahn, Ralf Meerkötter, Christiane Voigt, Sonja Gisinger, Daniel Sauer, Valéry Catoire, Volker Dreiling, Hugh Coe, Cyrille Flamant, Stefan Kaufmann, Jonas Kleine, Peter Knippertz, Manuel Moser, Philip Rosenberg, Hans Schlager, Alfons Schwarzenboeck, and Jonathan Taylor
Atmos. Chem. Phys., 23, 8515–8530, https://doi.org/10.5194/acp-23-8515-2023, https://doi.org/10.5194/acp-23-8515-2023, 2023
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During the DACCIWA campaign in West Africa, we found a 35 % increase in the cloud droplet concentration that formed in a polluted compared with a less polluted environment and a decrease of 17 % in effective droplet diameter. Radiative transfer simulations, based on the measured cloud properties, reveal that these low-level polluted clouds radiate only 2.6 % more energy back to space, compared with a less polluted cloud. The corresponding additional decrease in temperature is rather small.
Silke Groß, Tina Jurkat-Witschas, Qiang Li, Martin Wirth, Benedikt Urbanek, Martina Krämer, Ralf Weigel, and Christiane Voigt
Atmos. Chem. Phys., 23, 8369–8381, https://doi.org/10.5194/acp-23-8369-2023, https://doi.org/10.5194/acp-23-8369-2023, 2023
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Aviation-emitted aerosol can have an impact on cirrus clouds. We present optical and microphysical properties of mid-latitude cirrus clouds which were formed under the influence of aviation-emitted aerosol or which were formed under rather pristine conditions. We find that cirrus clouds affected by aviation-emitted aerosol show larger values of the particle linear depolarization ratio, larger mean effective ice particle diameters and decreased ice particle number concentrations.
Emma Järvinen, Franziska Nehlert, Guanglang Xu, Fritz Waitz, Guillaume Mioche, Regis Dupuy, Olivier Jourdan, and Martin Schnaiter
Atmos. Chem. Phys., 23, 7611–7633, https://doi.org/10.5194/acp-23-7611-2023, https://doi.org/10.5194/acp-23-7611-2023, 2023
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The Arctic is warming faster than other regions. Arctic low-level mixed-phase clouds, where ice crystals and liquid droplets co-exist, are thought to have an important role in Arctic warming. Here we show airborne measurements of vertical distribution of liquid and ice particles and their relative abundance. Ice particles are found in relative warm clouds, which can be explained by multiplication of existing ice crystals. However, the role of ice particles in redistributing sun light is minimal.
Manuel Moser, Christiane Voigt, Tina Jurkat-Witschas, Valerian Hahn, Guillaume Mioche, Olivier Jourdan, Régis Dupuy, Christophe Gourbeyre, Alfons Schwarzenboeck, Johannes Lucke, Yvonne Boose, Mario Mech, Stephan Borrmann, André Ehrlich, Andreas Herber, Christof Lüpkes, and Manfred Wendisch
Atmos. Chem. Phys., 23, 7257–7280, https://doi.org/10.5194/acp-23-7257-2023, https://doi.org/10.5194/acp-23-7257-2023, 2023
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This study provides a comprehensive microphysical and thermodynamic phase analysis of low-level clouds in the northern Fram Strait, above the sea ice and the open ocean, during spring and summer. Using airborne in situ cloud data, we show that the properties of Arctic low-level clouds vary significantly with seasonal meteorological situations and surface conditions. The observations presented in this study can help one to assess the role of clouds in the Arctic climate system.
Rachel Atlas and Christopher S. Bretherton
Atmos. Chem. Phys., 23, 4009–4030, https://doi.org/10.5194/acp-23-4009-2023, https://doi.org/10.5194/acp-23-4009-2023, 2023
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The tropical tropopause layer exists between the troposphere and the stratosphere in the tropics. Very thin cirrus clouds cool Earth's surface by scrubbing water vapor (a greenhouse gas) out of air parcels as they ascend through the tropical tropopause layer on their way to the stratosphere. We show observational evidence from aircraft that small-scale (< 100 km) gravity waves and turbulence increase the amount of ice in these clouds and may allow them to remove more water vapor from the air.
Konstantinos Matthaios Doulgeris, Ville Vakkari, Ewan J. O'Connor, Veli-Matti Kerminen, Heikki Lihavainen, and David Brus
Atmos. Chem. Phys., 23, 2483–2498, https://doi.org/10.5194/acp-23-2483-2023, https://doi.org/10.5194/acp-23-2483-2023, 2023
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We investigated how different long-range-transported air masses can affect the microphysical properties of low-level clouds in a clean subarctic environment. A connection was revealed. Higher values of cloud droplet number concentrations were related to continental air masses, whereas the lowest values of number concentrations were related to marine air masses. These were characterized by larger cloud droplets. Clouds in all regions were sensitive to increases in cloud number concentration.
Fayçal Lamraoui, Martina Krämer, Armin Afchine, Adam B. Sokol, Sergey Khaykin, Apoorva Pandey, and Zhiming Kuang
Atmos. Chem. Phys., 23, 2393–2419, https://doi.org/10.5194/acp-23-2393-2023, https://doi.org/10.5194/acp-23-2393-2023, 2023
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Cirrus in the tropical tropopause layer (TTL) can play a key role in vertical transport. We investigate the role of different cloud regimes and the associated ice habits in regulating the properties of the TTL. We use high-resolution numerical experiments at the scales of large-eddy simulations (LESs) and aircraft measurements. We found that LES-scale parameterizations that predict ice shape are crucial for an accurate representation of TTL cirrus and thus the associated (de)hydration process.
Yun Li, Christoph Mahnke, Susanne Rohs, Ulrich Bundke, Nicole Spelten, Georgios Dekoutsidis, Silke Groß, Christiane Voigt, Ulrich Schumann, Andreas Petzold, and Martina Krämer
Atmos. Chem. Phys., 23, 2251–2271, https://doi.org/10.5194/acp-23-2251-2023, https://doi.org/10.5194/acp-23-2251-2023, 2023
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The radiative effect of aviation-induced cirrus is closely related to ambient conditions and its microphysical properties. Our study investigated the occurrence of contrail and natural cirrus measured above central Europe in spring 2014. It finds that contrail cirrus appears frequently in the pressure range 200 to 245 hPa and occurs more often in slightly ice-subsaturated environments than expected. Avoiding slightly ice-subsaturated regions by aviation might help mitigate contrail cirrus.
Flor Vanessa Maciel, Minghui Diao, and Ryan Patnaude
Atmos. Chem. Phys., 23, 1103–1129, https://doi.org/10.5194/acp-23-1103-2023, https://doi.org/10.5194/acp-23-1103-2023, 2023
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Aerosol indirect effects on cirrus clouds are investigated during cirrus evolution, using global-scale in situ observations and climate model simulations. As cirrus evolves, the mechanisms to form ice crystals also change with time. Both small and large aerosols are found to affect cirrus properties. Southern Hemisphere cirrus appears to be more sensitive to additional aerosols. The climate model underestimates ice crystal mass, likely due to biases of relative humidity and vertical velocity.
David E. Kingsmill, Jeffrey R. French, and Neil P. Lareau
Atmos. Chem. Phys., 23, 1–21, https://doi.org/10.5194/acp-23-1-2023, https://doi.org/10.5194/acp-23-1-2023, 2023
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This study uses in situ aircraft measurements to characterize the size and shape distributions of 10 µm to 6 mm diameter particles observed during six penetrations of wildfire-induced pyroconvection. Particles sampled in one penetration of a smoke plume are most likely pyrometeors composed of ash. The other penetrations are through pyrocumulus clouds where particle composition is most likely a combination of hydrometeors (ice particles) and pyrometeors (ash).
Julie Thérèse Pasquier, Jan Henneberger, Fabiola Ramelli, Annika Lauber, Robert Oscar David, Jörg Wieder, Tim Carlsen, Rosa Gierens, Marion Maturilli, and Ulrike Lohmann
Atmos. Chem. Phys., 22, 15579–15601, https://doi.org/10.5194/acp-22-15579-2022, https://doi.org/10.5194/acp-22-15579-2022, 2022
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It is important to understand how ice crystals and cloud droplets form in clouds, as their concentrations and sizes determine the exact radiative properties of the clouds. Normally, ice crystals form from aerosols, but we found evidence for the formation of additional ice crystals from the original ones over a large temperature range within Arctic clouds. In particular, additional ice crystals were formed during collisions of several ice crystals or during the freezing of large cloud droplets.
Layrson J. M. Gonçalves, Simone M. S. C. Coelho, Paulo Y. Kubota, and Dayana C. Souza
Atmos. Chem. Phys., 22, 15509–15526, https://doi.org/10.5194/acp-22-15509-2022, https://doi.org/10.5194/acp-22-15509-2022, 2022
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This research aims to study the environmental conditions that are favorable and not favorable to cloud formation, in this case specifically for the Amazon region. The results found in this research will be used to improve the representation of clouds in numerical models that are used in weather and climate prediction. In general, it is expected that with better knowledge regarding the cloud–radiation interaction, it is possible to make a better forecast of weather and climate.
Claudia Mignani, Lukas Zimmermann, Rigel Kivi, Alexis Berne, and Franz Conen
Atmos. Chem. Phys., 22, 13551–13568, https://doi.org/10.5194/acp-22-13551-2022, https://doi.org/10.5194/acp-22-13551-2022, 2022
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We determined over the course of 8 winter months the phase of clouds associated with snowfall in Northern Finland using radiosondes and observations of ice particle habits at ground level. We found that precipitating clouds were extending from near ground to at least 2.7 km altitude and approximately three-quarters of them were likely glaciated. Possible moisture sources and ice formation processes are discussed.
Alexei Korolev, Paul J. DeMott, Ivan Heckman, Mengistu Wolde, Earle Williams, David J. Smalley, and Michael F. Donovan
Atmos. Chem. Phys., 22, 13103–13113, https://doi.org/10.5194/acp-22-13103-2022, https://doi.org/10.5194/acp-22-13103-2022, 2022
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The present study provides the first explicit in situ observation of secondary ice production at temperatures as low as −27 °C, which is well outside the range of the Hallett–Mossop process (−3 to −8 °C). This observation expands our knowledge of the temperature range of initiation of secondary ice in clouds. The obtained results are intended to stimulate laboratory and theoretical studies to develop physically based parameterizations for weather prediction and climate models.
Siddhant Gupta, Greg M. McFarquhar, Joseph R. O'Brien, Michael R. Poellot, David J. Delene, Ian Chang, Lan Gao, Feng Xu, and Jens Redemann
Atmos. Chem. Phys., 22, 12923–12943, https://doi.org/10.5194/acp-22-12923-2022, https://doi.org/10.5194/acp-22-12923-2022, 2022
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The ability of NASA’s Terra and Aqua satellites to retrieve cloud properties and estimate the changes in cloud properties due to aerosol–cloud interactions (ACI) was examined. There was good agreement between satellite retrievals and in situ measurements over the southeast Atlantic Ocean. This suggests that, combined with information on aerosol properties, satellite retrievals of cloud properties can be used to study ACI over larger domains and longer timescales in the absence of in situ data.
Étienne Vignon, Lea Raillard, Christophe Genthon, Massimo Del Guasta, Andrew J. Heymsfield, Jean-Baptiste Madeleine, and Alexis Berne
Atmos. Chem. Phys., 22, 12857–12872, https://doi.org/10.5194/acp-22-12857-2022, https://doi.org/10.5194/acp-22-12857-2022, 2022
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The near-surface atmosphere over the Antarctic Plateau is cold and pristine and resembles to a certain extent the high troposphere where cirrus clouds form. In this study, we use innovative humidity measurements at Concordia Station to study the formation of ice fogs at temperatures <−40°C. We provide observational evidence that ice fogs can form through the homogeneous freezing of solution aerosols, a common nucleation pathway for cirrus clouds.
Jan H. Schween, Camilo del Rio, Juan-Luis García, Pablo Osses, Sarah Westbrook, and Ulrich Löhnert
Atmos. Chem. Phys., 22, 12241–12267, https://doi.org/10.5194/acp-22-12241-2022, https://doi.org/10.5194/acp-22-12241-2022, 2022
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Marine stratocumulus clouds of the eastern Pacific play an essential role in the Earth's climate. These clouds form the major source of water to parts of the extreme dry Atacama Desert at the northern coast of Chile. For the first time these clouds are observed over a whole year with three remote sensing instruments. It is shown how these clouds are influenced by the land–sea wind system and the distribution of ocean temperatures.
Marie Mazoyer, Frédéric Burnet, and Cyrielle Denjean
Atmos. Chem. Phys., 22, 11305–11321, https://doi.org/10.5194/acp-22-11305-2022, https://doi.org/10.5194/acp-22-11305-2022, 2022
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The evolution of the droplet size distribution during the fog life cycle remains poorly understood and progress is required to reduce the uncertainty of fog forecasts. To gain insights into the physical processes driving the microphysics, intensive field campaigns were conducted during three winters at the SIRTA site in the south of Paris. This study analyzed the variations in fog microphysical properties and their potential interactions at the different evolutionary stages of the fog events.
Xianda Gong, Martin Radenz, Heike Wex, Patric Seifert, Farnoush Ataei, Silvia Henning, Holger Baars, Boris Barja, Albert Ansmann, and Frank Stratmann
Atmos. Chem. Phys., 22, 10505–10525, https://doi.org/10.5194/acp-22-10505-2022, https://doi.org/10.5194/acp-22-10505-2022, 2022
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The sources of ice-nucleating particles (INPs) are poorly understood in the Southern Hemisphere (SH). We studied INPs in the boundary layer in the southern Patagonia region. No seasonal cycle of INP concentrations was observed. The majority of INPs are biogenic particles, likely from local continental sources. The INP concentrations are higher when strong precipitation occurs. While previous studies focused on marine INP sources in SH, we point out the importance of continental sources of INPs.
Jörg Wieder, Nikola Ihn, Claudia Mignani, Moritz Haarig, Johannes Bühl, Patric Seifert, Ronny Engelmann, Fabiola Ramelli, Zamin A. Kanji, Ulrike Lohmann, and Jan Henneberger
Atmos. Chem. Phys., 22, 9767–9797, https://doi.org/10.5194/acp-22-9767-2022, https://doi.org/10.5194/acp-22-9767-2022, 2022
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Ice formation and its evolution in mixed-phase clouds are still uncertain. We evaluate the lidar retrieval of ice-nucleating particle concentration in dust-dominated and continental air masses over the Swiss Alps with in situ observations. A calibration factor to improve the retrieval from continental air masses is proposed. Ice multiplication factors are obtained with a new method utilizing remote sensing. Our results indicate that secondary ice production occurs at temperatures down to −30 °C.
Saleem Ali, Sanjay Kumar Mehta, Aravindhavel Ananthavel, and Tondapu Venkata Ramesh Reddy
Atmos. Chem. Phys., 22, 8321–8342, https://doi.org/10.5194/acp-22-8321-2022, https://doi.org/10.5194/acp-22-8321-2022, 2022
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Multiple cirrus clouds frequently occur over regions of deep convection in the tropics. Tropical convection has a strong diurnal pattern, with peaks in the afternoon to early evening, over the continents. Continuous micropulse lidar observations over a coastal station in the Indian monsoon region enable us, for the first time, to demonstrate a robust diurnal pattern of single and multiple cirrus occurrences, with peaks during the late afternoon and early morning hours, respectively.
Cuiqi Zhang, Zhijun Wu, Jingchuan Chen, Jie Chen, Lizi Tang, Wenfei Zhu, Xiangyu Pei, Shiyi Chen, Ping Tian, Song Guo, Limin Zeng, Min Hu, and Zamin A. Kanji
Atmos. Chem. Phys., 22, 7539–7556, https://doi.org/10.5194/acp-22-7539-2022, https://doi.org/10.5194/acp-22-7539-2022, 2022
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The immersion ice nucleation effectiveness of aerosols from multiple sources in the urban environment remains elusive. In this study, we demonstrate that the immersion ice-nucleating particle (INP) concentration increased dramatically during a dust event in an urban atmosphere. Pollutant aerosols, including inorganic salts formed through secondary transformation (SIA) and black carbon (BC), might not act as effective INPs under mixed-phase cloud conditions.
Fritz Waitz, Martin Schnaiter, Thomas Leisner, and Emma Järvinen
Atmos. Chem. Phys., 22, 7087–7103, https://doi.org/10.5194/acp-22-7087-2022, https://doi.org/10.5194/acp-22-7087-2022, 2022
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Riming, i.e., the accretion of small droplets on the surface of ice particles via collision, is one of the major uncertainties in model prediction of mixed-phase clouds. We discuss the occurrence (up to 50% of particles) and aging of rimed ice particles and show correlations of the occurrence and the degree of riming with ambient meteorological parameters using data gathered by the Particle Habit Imaging and Polar Scattering (PHIPS) probe during three airborne in situ field campaigns.
Zoé Brasseur, Dimitri Castarède, Erik S. Thomson, Michael P. Adams, Saskia Drossaart van Dusseldorp, Paavo Heikkilä, Kimmo Korhonen, Janne Lampilahti, Mikhail Paramonov, Julia Schneider, Franziska Vogel, Yusheng Wu, Jonathan P. D. Abbatt, Nina S. Atanasova, Dennis H. Bamford, Barbara Bertozzi, Matthew Boyer, David Brus, Martin I. Daily, Romy Fösig, Ellen Gute, Alexander D. Harrison, Paula Hietala, Kristina Höhler, Zamin A. Kanji, Jorma Keskinen, Larissa Lacher, Markus Lampimäki, Janne Levula, Antti Manninen, Jens Nadolny, Maija Peltola, Grace C. E. Porter, Pyry Poutanen, Ulrike Proske, Tobias Schorr, Nsikanabasi Silas Umo, János Stenszky, Annele Virtanen, Dmitri Moisseev, Markku Kulmala, Benjamin J. Murray, Tuukka Petäjä, Ottmar Möhler, and Jonathan Duplissy
Atmos. Chem. Phys., 22, 5117–5145, https://doi.org/10.5194/acp-22-5117-2022, https://doi.org/10.5194/acp-22-5117-2022, 2022
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The present measurement report introduces the ice nucleation campaign organized in Hyytiälä, Finland, in 2018 (HyICE-2018). We provide an overview of the campaign settings, and we describe the measurement infrastructure and operating procedures used. In addition, we use results from ice nucleation instrument inter-comparison to show that the suite of these instruments deployed during the campaign reports consistent results.
Kevin J. Sanchez, Bo Zhang, Hongyu Liu, Matthew D. Brown, Ewan C. Crosbie, Francesca Gallo, Johnathan W. Hair, Chris A. Hostetler, Carolyn E. Jordan, Claire E. Robinson, Amy Jo Scarino, Taylor J. Shingler, Michael A. Shook, Kenneth L. Thornhill, Elizabeth B. Wiggins, Edward L. Winstead, Luke D. Ziemba, Georges Saliba, Savannah L. Lewis, Lynn M. Russell, Patricia K. Quinn, Timothy S. Bates, Jack Porter, Thomas G. Bell, Peter Gaube, Eric S. Saltzman, Michael J. Behrenfeld, and Richard H. Moore
Atmos. Chem. Phys., 22, 2795–2815, https://doi.org/10.5194/acp-22-2795-2022, https://doi.org/10.5194/acp-22-2795-2022, 2022
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Atmospheric particle concentrations impact clouds, which strongly impact the amount of sunlight reflected back into space and the overall climate. Measurements of particles over the ocean are rare and expensive to collect, so models are necessary to fill in the gaps by simulating both particle and clouds. However, some measurements are needed to test the accuracy of the models. Here, we measure changes in particles in different weather conditions, which are ideal for comparison with models.
Siddhant Gupta, Greg M. McFarquhar, Joseph R. O'Brien, Michael R. Poellot, David J. Delene, Rose M. Miller, and Jennifer D. Small Griswold
Atmos. Chem. Phys., 22, 2769–2793, https://doi.org/10.5194/acp-22-2769-2022, https://doi.org/10.5194/acp-22-2769-2022, 2022
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This study evaluates the impact of biomass burning aerosols on precipitation in marine stratocumulus clouds using observations from the NASA ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) field campaign over the Southeast Atlantic. Instances of contact and separation between aerosol and cloud layers show polluted clouds have a lower precipitation rate and a lower precipitation susceptibility. This information will help improve cloud representation in Earth system models.
Anna E. Luebke, André Ehrlich, Michael Schäfer, Kevin Wolf, and Manfred Wendisch
Atmos. Chem. Phys., 22, 2727–2744, https://doi.org/10.5194/acp-22-2727-2022, https://doi.org/10.5194/acp-22-2727-2022, 2022
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A combination of aircraft and satellite observations is used to show how the characteristics of tropical shallow clouds interact with incoming and outgoing energy. A complete depiction of these clouds is challenging to obtain, but such data are useful for understanding how models can correctly represent them. The amount of cloud is found to be the most important factor, while other cloud characteristics become increasingly impactful when more cloud is present.
Graciela B. Raga, Darrel Baumgardner, Blanca Rios, Yanet Díaz-Esteban, Alejandro Jaramillo, Martin Gallagher, Bastien Sauvage, Pawel Wolff, and Gary Lloyd
Atmos. Chem. Phys., 22, 2269–2292, https://doi.org/10.5194/acp-22-2269-2022, https://doi.org/10.5194/acp-22-2269-2022, 2022
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The In-Service Aircraft for a Global Observing System (IAGOS) is a small fleet of commercial aircraft that carry a suite of meteorological, gas, aerosol, and cloud sensors and have been measuring worldwide for almost 9 years, since late 2011. Extreme ice events (EIEs) have been identified from the IAGOS cloud measurements and linked to surface emissions for biomass and fossil fuel consumption. The results reported here are highly relevant for climate change and flight operations forecasting.
Carolina Viceto, Irina V. Gorodetskaya, Annette Rinke, Marion Maturilli, Alfredo Rocha, and Susanne Crewell
Atmos. Chem. Phys., 22, 441–463, https://doi.org/10.5194/acp-22-441-2022, https://doi.org/10.5194/acp-22-441-2022, 2022
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We focus on anomalous moisture transport events known as atmospheric rivers (ARs). During ACLOUD and PASCAL, three AR events were identified: 30 May, 6 June, and 9 June 2017. We explore their spatio-temporal evolution and precipitation patterns using measurements, reanalyses, and a model. We show the importance of the following: Atlantic and Siberian pathways during spring–summer in the Arctic, AR-associated heat/moisture increase, precipitation phase transition, and high-resolution datasets.
Sandra Vázquez-Martín, Thomas Kuhn, and Salomon Eliasson
Atmos. Chem. Phys., 21, 18669–18688, https://doi.org/10.5194/acp-21-18669-2021, https://doi.org/10.5194/acp-21-18669-2021, 2021
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High-resolution top- and side-view images of snow ice particles taken by the D-ICI instrument are used to determine the shape; size; cross-sectional area; fall speed; and, based upon these properties, the mass of the individual snow particles. The study analyses the relationships between these fundamental properties as a function of particle shape and highlights that the choice of size parameter, maximum dimension or another characteristic length, is crucial when relating fall speed to mass.
Elvis Torres-Delgado, Darrel Baumgardner, and Olga L. Mayol-Bracero
Atmos. Chem. Phys., 21, 18011–18027, https://doi.org/10.5194/acp-21-18011-2021, https://doi.org/10.5194/acp-21-18011-2021, 2021
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African dust aerosols can travel thousands of kilometers and reach the Caribbean and other places, where they can serve as ice and cloud condensation nuclei and alter precipitation patterns. Cloud microphysical properties (droplet number and size) were measured in a Caribbean tropical montane cloud forest along with models and satellite products. The results of the study suggest that meteorology and air mass history are more important for cloud processes than aerosols transported from Africa.
Irini Tsiodra, Georgios Grivas, Kalliopi Tavernaraki, Aikaterini Bougiatioti, Maria Apostolaki, Despina Paraskevopoulou, Alexandra Gogou, Constantine Parinos, Konstantina Oikonomou, Maria Tsagkaraki, Pavlos Zarmpas, Athanasios Nenes, and Nikolaos Mihalopoulos
Atmos. Chem. Phys., 21, 17865–17883, https://doi.org/10.5194/acp-21-17865-2021, https://doi.org/10.5194/acp-21-17865-2021, 2021
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We analyze observations from year-long measurements at Athens, Greece. Nighttime wintertime PAH levels are 4 times higher than daytime, and wintertime values are 15 times higher than summertime. Biomass burning aerosol during wintertime pollution events is responsible for these significant wintertime enhancements and accounts for 43 % of the population exposure to PAH carcinogenic risk. Biomass burning poses additional health risks beyond those associated with the high PM levels that develop.
Tiziana Bräuer, Christiane Voigt, Daniel Sauer, Stefan Kaufmann, Valerian Hahn, Monika Scheibe, Hans Schlager, Felix Huber, Patrick Le Clercq, Richard H. Moore, and Bruce E. Anderson
Atmos. Chem. Phys., 21, 16817–16826, https://doi.org/10.5194/acp-21-16817-2021, https://doi.org/10.5194/acp-21-16817-2021, 2021
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Over half of aviation climate impact is caused by contrails. Biofuels can reduce the ice crystal numbers in contrails and mitigate the climate impact. The experiment ECLIF II/NDMAX in 2018 assessed the effects of biofuels on contrails and aviation emissions. The NASA DC-8 aircraft performed measurements inside the contrail of the DLR A320. One reference fuel and two blends of the biofuel HEFA and kerosene are analysed. We find a max reduction of contrail ice numbers through biofuel use of 40 %.
Yue Sun and Chuanfeng Zhao
Atmos. Chem. Phys., 21, 16555–16574, https://doi.org/10.5194/acp-21-16555-2021, https://doi.org/10.5194/acp-21-16555-2021, 2021
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Using high-resolution multi-year warm season data, the influence of aerosol on precipitation time over the North China Plain (NCP), Yangtze River Delta (YRD), and Pearl River Delta (PRD) is investigated. Aerosol amount and type have significant influence on precipitation time: precipitation start time is advanced by 3 h in the NCP, delayed 2 h in the PRD, and negligibly changed in the YRD. Aerosol impact on precipitation is also influenced by precipitation type and meteorological conditions.
Oscar Javier Rojas Muñoz, Marjolaine Chiriaco, Sophie Bastin, and Justine Ringard
Atmos. Chem. Phys., 21, 15699–15723, https://doi.org/10.5194/acp-21-15699-2021, https://doi.org/10.5194/acp-21-15699-2021, 2021
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A method is developed and evaluated to quantify each process that affects hourly 2 m temperature variations on a local scale, based almost exclusively on observations retrieved from an observatory near the Paris region. Each term involved in surface temperature variations is estimated, and its contribution and importance are also assessed. It is found that clouds are the main modulator on hourly temperature variations for most hours of the day, and thus their characterization is addressed.
Michael P. Jensen, Virendra P. Ghate, Dié Wang, Diana K. Apoznanski, Mary J. Bartholomew, Scott E. Giangrande, Karen L. Johnson, and Mandana M. Thieman
Atmos. Chem. Phys., 21, 14557–14571, https://doi.org/10.5194/acp-21-14557-2021, https://doi.org/10.5194/acp-21-14557-2021, 2021
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This work compares the large-scale meteorology, cloud, aerosol, precipitation, and thermodynamics of closed- and open-cell cloud organizations using long-term observations from the astern North Atlantic. Open-cell cases are associated with cold-air outbreaks and occur in deeper boundary layers, with stronger winds and higher rain rates compared to closed-cell cases. These results offer important benchmarks for model representation of boundary layer clouds in this climatically important region.
Karlie N. Rees, Dhiraj K. Singh, Eric R. Pardyjak, and Timothy J. Garrett
Atmos. Chem. Phys., 21, 14235–14250, https://doi.org/10.5194/acp-21-14235-2021, https://doi.org/10.5194/acp-21-14235-2021, 2021
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Accurate predictions of weather and climate require descriptions of the mass and density of snowflakes as a function of their size. Few measurements have been obtained to date because snowflakes are so small and fragile. This article describes results from a new instrument that automatically measures individual snowflake size, mass, and density. Key findings are that small snowflakes have much lower densities than is often assumed and that snowflake density increases with temperature.
Ramon Campos Braga, Daniel Rosenfeld, Ovid O. Krüger, Barbara Ervens, Bruna A. Holanda, Manfred Wendisch, Trismono Krisna, Ulrich Pöschl, Meinrat O. Andreae, Christiane Voigt, and Mira L. Pöhlker
Atmos. Chem. Phys., 21, 14079–14088, https://doi.org/10.5194/acp-21-14079-2021, https://doi.org/10.5194/acp-21-14079-2021, 2021
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Quantifying the precipitation within clouds is crucial for our understanding of the Earth's hydrological cycle. Using in situ measurements of cloud and rain properties over the Amazon Basin and Atlantic Ocean, we show here a linear relationship between the effective radius (re) and precipitation water content near the tops of convective clouds for different pollution states and temperature levels. Our results emphasize the role of re to determine both initiation and amount of precipitation.
Haoran Li, Alexei Korolev, and Dmitri Moisseev
Atmos. Chem. Phys., 21, 13593–13608, https://doi.org/10.5194/acp-21-13593-2021, https://doi.org/10.5194/acp-21-13593-2021, 2021
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Kelvin–Helmholtz (K–H) clouds embedded in a stratiform precipitation event were uncovered via radar Doppler spectral analysis. Given the unprecedented detail of the observations, we show that multiple populations of secondary ice columns were generated in the pockets where larger cloud droplets are formed and not at some constant level within the cloud. Our results highlight that the K–H instability is favorable for liquid droplet growth and secondary ice formation.
Alice Henkes, Gilberto Fisch, Luiz A. T. Machado, and Jean-Pierre Chaboureau
Atmos. Chem. Phys., 21, 13207–13225, https://doi.org/10.5194/acp-21-13207-2021, https://doi.org/10.5194/acp-21-13207-2021, 2021
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The Amazonian boundary layer is investigated during the dry season in order to better understand the processes that occur between night and day until the stage where shallow cumulus clouds become deep. Observations show that shallow to deep clouds are characterized by a shorter morning transition stage (e.g., the time needed to eliminate the stable boundary layer inversion), while higher humidity above the boundary layer favors the evolution from shallow to deep cumulus clouds.
Cited articles
Arcanjo, M., Montanyà, J., Urbani, M., Lorenzo, V., and Pineda, N.:
Observations of corona point discharges from grounded rods under
thunderstorms, Atmos. Res., 247, 105238, https://doi.org/10.1016/j.atmosres.2020.105238, 2021.
Bartoli, B., Bernardini, P., Bi, X. J., Cao, Z., Catalanotti, S., Chen, S. Z., Chen, T. L., Cui, S. W., Dai, B. Z., Amone, A. D., Luobu, D., De Mitri, I., Ettorre Piazzoli, B. D., Di Girolamo, T., Di Sciascio, G., Feng, C. F., Feng, Z., Feng, Z., Gao, W., Gou, Q. B., Guo, Y. Q., He, H. H., Hu, H., Hu H., Iacovacci, M., Iuppa, R., Jia, H. Y., Ren, L., Li, H. J., Liu, C., Liu, J., Liu, M. Y., Lu, H., Ma, L. L., Ma, X. H., Mancarella, G., Mari, S. M., Marsella, G., Mastroianni, S., Montini, P., Ning, C. C., Perrone, L., Pistilli, P., Salvini, P., Santonico, R., Shen, P. R., Sheng, X. D., Shi, F., Surdo, A., Tan, Y. H., Vallania, P., Vernetto, S., Vigorito, C., Wang, H., Wu, C. Y., Wu, H. R., Xue, L., Yang, Q. Y., Yang, X. C., Yao, Z. G., Yuan, A. F., Zha, M., Zhang, H. M., Zhang, L., Zhang, X. Y., Zhang, Y., Zhao, J., Ren, Z., Zhu, Z., Zhou, X. X., Zhu, F. R., Zhu, Q. Q., and Alessandro, F. D.: Observation of the thunderstorm-related ground cosmic ray flux variations by ARGO-YBJ, Phys. Rev. D, 97, 042001, https://doi.org/10.1103/PhysRevD.97.042001, 2018.
Biggerstaff, M. I., Zounes, Z., Addison Alford, A., Carrie, G. D., Pilkey, J. T., Uman, M. A., and Jordan, D. M.: Flash propagation and inferred charge structure relative to radar-observed ice alignment signatures in a small Florida mesoscale convective system, Geophys. Res. Lett., 44, 8027–8036, https://doi.org/10.1002/2017GL074610, 2017.
Boudard, A., Cugnon, J., David, J.-C., Leray, S., and Mancusi, D.: New
potentialities of the Liège intranuclear cascade model for reactions
induced by nucleons and light charged particles, Phys. Rev., C87, 014606,
https://doi.org/10.1103/PhysRevC.87.014606, 2013.
Brunetti, M., Cecchini, S., Galli, M., Giovannini, G., and Pagliarin, A.:
Gamma-ray bursts of atmospheric origin in the MeV energy range, Geophys. Res.
Lett., 27, 1599–1602, https://doi.org/10.1029/2000GL003750, 2000.
Chauzy, S. and Soula, S.: Contribution of the ground corona ions to the
convective charging mechanism, Atmos. Res., 51, 279–300, 1999.
Chilingarian, A., Hovsepyan, G., Arakelyan, K., Chilingaryan, S., Danielyan,
V., Avakyan, K., Yeghikyan, A., Reymers, A., and Tserunyan, S.: Space environmental viewing and analysis network (SEVAN), Earth Moon Planets, 104, 195–210, https://doi.org/10.1007/s11038-008-9288-1, 2009.
Chilingarian, A., Daryan, A., Arakelyan, K., Hovhannisyan, A., Mailyan, B.,
Melkumyan, L., and Hovsepyan, G.: Ground-based observations of thunderstorm
correlated fluxes of high-energy electrons, gamma rays, and neutrons, Phys.
Rev. D, 82, 043009, https://doi.org/10.1103/PhysRevD.82.043009, 2010.
Chilingarian, A., Hovsepyan, G., and Hovhannisyan, A.: Particle bursts from
thunderclouds: Natural particle accelerators above our heads, Phys.
Rev. D, 83, 062001, https://doi.org/10.1103/PhysRevD.83.062001, 2011.
Chilingarian, A., Mailyan, B., and Vanyan, L.: Recovering of the energy
spectra of electrons and gamma rays coming from the thunderclouds,
Atmos. Res., 114–115, 1–16, https://doi.org/10.1016/j.atmosres.2012.05.008, 2012.
Chilingarian, A., Chilingaryan, S., and Reymers, A.: Atmospheric discharges
and particle fluxes, J. Geophys. Res.-Space, 120, 5845–5853,
https://doi.org/10.1002/2015JA021259, 2015.
Chilingarian, A., Hovsepyan, G., and Kozliner, L.: Extensive air showers,
lightning, and hunderstorm ground enhancements, Astropart. Phys., 82,
21–35, https://doi.org/10.1016/j.astropartphys.2016.04.006, 2016.
Chilingarian, A., Chilingaryan, S., Karapetyan, T., Kozliner, L.,
Khanikyants, Y. Hovsepyan, G., Pokhsraryan, D., and Soghomonyan, S.: On the
initiation of lightning in thunderclouds, Sci. Rep., 7, 1371,
https://doi.org/10.1038/s41598-017-01288-0, 2017a.
Chilingarian, A., Khanikyants, Y., Mareev, E., Pokhsraryan, D., Rakov, V. A.,
and Soghomonyan, S.: Types of lightning discharges that abruptly terminate
enhanced fluxes of energetic radiation and particles observed at ground
level, J. Geophys. Res.-Atmos., 122, 7582, https://doi.org/10.1002/2017JD026744, 2017b.
Chilingarian, A., Hovsepyan, G., Soghomonyan, S., Zazyan, M., and Zelenyy,
M.: Structures of the intracloud electric field supporting origin of
long-lasting thunderstorm ground enhancements, Phys. Rev. D, 98, 082001,
https://doi.org/10.1103/PhysRevD.98.082001, 2018.
Chilingarian, A., Soghomonyan, S., Khanikyanc, Y., and Pokhsraryan, D.: On
the origin of particle fluxes from thunderclouds, Astropart. Phys.,
105, 54–62, https://doi.org/10.1016/j.astropartphys.2018.10.004, 2019.
Chilingarian, A., Hovsepyan, G., and Sargsyan, B.: Circulation of Radon
progeny in the terrestrial atmosphere during thunderstorms, Geophys.
Res. Lett., 47, e2020GL091155, https://doi.org/10.1029/2020GL091155, 2020a.
Chilingarian, A., Khanikyants, Y., Rakov, V. A., and Soghomonyan, S.:
Termination of thunderstorm-related bursts of energetic radiation and
particles by inverted intracloud and hybrid lightning discharges,
Atmos. Res., 233, 104713, https://doi.org/10.1016/j.atmosres.2019.104713, 2020b.
Chilingarian, A., Karapetyan, T., Zazyan, M., Hovsepyan, G., Sargysan, B., Nikolova, N., Angelov, H., Chum, Jaroslav, and Langer, R.: Maximum strength of the atmospheric electric field, Phys. Rev. D, 103, 043021, https://doi.org/10.1103/PhysRevD.103.043021, 2021.
Chum, J., Langer, R., Baše, J., Kollárik, M., Strhárský, I.,
Diendorfer, G., and Rusz, J.: Significant enhancements of secondary cosmic
rays and electric field at the high mountain peak of Lomnický
Štít in High Tatras during thunderstorms, Earth Planets Space,
72, 28, https://doi.org/10.1186/s40623-020-01155-9, 2020.
Clothiaux, E. E., Miller, M. A., Albrecht, B. A., Ackerman, T. P., Verlinde,
J., Babb, D. M., Peters, R. M., and Syrett, W. J.: An Evaluation of a 94-GHz
Radar for Remote Sensing of Cloud Properties, J. Atmos. Ocean. Technol. 12,
201–229, 1995.
Daidzic, N. E.: A new model for lifting condensation levels estimation,
International Journal of Aviation, Aeronautics, and Aerospace, 6, 1–17,
https://doi.org/10.15394/ijaaa.2019.1341, 2019.
Dwyer J. R. and Uman, M. A.: The physics of lightning, Phys. Rep., 534,
147–241, https://doi.org/10.1016/j.physrep.2013.09.004, 2014.
Dwyer, J. R., Smith, D. M., and Cummer, S. A.: High-energy atmospheric
physics: Terrestrial gamma-ray flashes and related phenomena, Space Sci.
Rev., 173, 133–196,https://doi.org/10.1007/s11214-012-9894-0, 2012.
Eack, K. B., Beasley, W. H., Rust, W. D., Marshall, T. C., and Stolzenburg,
M.: Initial results from simultaneous observation of X-rays and electric
fields in a thunderstorm, J. Geophys. Res., 101, 29637–29640, https://doi.org/10.1029/96JD01705, 1996.
Görsdorf, U., Lehmann, V., Bauer-Pfundstein, M., Peters, G., Vavriv, D.,
Vinogradov, V., and Volkov, V.: A 35-GHz Polarimetric Doppler Radar for
Long-Term Observations of Cloud Parameters – Description of System and Data
Processing, J. Atmos. Ocean. Technol., 32, 675–690, 2015.
Gossard, E. E.: Measurement of Cloud Droplet Size Spectra by Doppler Radar,
J. Atmos. Ocean. Technol., 11, 712–726, 1994.
Gurevich, A. V., Milikh, G. M., and Roussel-Dupre, R.: Runaway electron
mechanism of air breakdown and preconditioning during a thunderstorm, Phys.
Lett. A, 165, 463–468, 1992.
Iida, K., Kohama, A., and Oyamatsu, K.: Formula for Proton–Nucleus Reaction
Cross Section at Intermediate Energies and Its Application, J. Phys. Soc.
Jpn., 76, 044201, https://doi.org/10.1143/JPSJ.76.044201, 2007.
Iudin, D. I., Rakov, V. A., Mareev, E. A., Iudin, F. D., Syssoev, A. A.,
and Davydenko, S. S.: Advanced numerical model of lightning development:
Application to studying the role of LPCR in determining lightning type, J.
Geophys. Res.-Atmos., 122, 6416–6430, https://doi.org/10.1002/2016JD026261, 2017.
Kašpar, M., Müller, M., Crhová, L., E., Polášek, J. F.,
Pop, L., and Valeriánová, A.: Relationship between Czech windstorms
and air temperature, Int. J. Climatol., 37, 11–24, https://doi.org/10.1002/joc.4682,
2017.
Kašpar, P., Santolík, O., and Kolmašová, I.: Unipolar and
bipolar pulses emitted during the development of lightning flashes, Geophys.
Res. Lett., 42, 7206–7213, https://doi.org/10.1002/2015GL064777, 2015.
Kelley, N. A., Smith, D. M., Dwyer, J. R. Splitt M., Lazarus, S.,
Martinez-McKinney, H., Hazelton, B., Grefenstette, B., Lowell, A., and
Rassoul, H. K.: Relativistic electron avalanches as a thunderstorm discharge
competing with lightning, Nat. Commun., 6, 7845, https://doi.org/10.1038/ncomms8845,
2015.
Kochkin, P., van Deursen, A. P. J., Marisaldi, M., Ursi, A., de Boer,
A. I., Bardet, Allasia, C., Boissin, J.-F., Flourens, F., and Østgaard, N.: In-flight observation of gamma ray glows by ILDAS, J. Geophys. Res.-Atmos., 122, 12801–12811, https://doi.org/10.1002/2017JD027405, 2017.
Kochkin, P., Sarria, D., Lehtinen, N., Mezentsev, A., Yang, S., Genov, G.,
Ullaland, K., Marisaldi, M., Østgaard, N., Christian, H. J., Grove, J. E., Quick, M., Al-Nussirat, S., and Wulf, E.: A rapid gamma-ray glow flux reduction observed from 20 km altitude, J. Geophys. Res.-Atmos., 126, e2020JD033467, https://doi.org/10.1029/2020JD033467, 2021.
Kollias, P., Albrecht, B. A., Lhermitte, R., and Savtchenko, A.: Radar
Observations of Updrafts, Downdrafts, and Turbulence in Fair-Weather Cumuli,
J. Atmos. Sci., 58, 1750–1766, 2001.
Kollias, P., Clothiaux, E. E., Miller, M. A., Albrecht, B. A., Stephens, G.
L., and Ackerman, T. P.: Millimeter-Wavelength Radars: New Frontier in
Atmospheric Cloud and Precipitation Research, B. Am. Meteorol. Soc., 88,
1608–1624, 2007.
Kolmašová, I.: data_acp-2022-125, Mendeley Data, V1 [data set], https://doi.org/10.17632/p27tzscvb3.1, 2022.
Kolmašová, I. and Santolík, O.: Properties of unipolar magnetic
field pulse trains generated by lightning discharges, Geophys. Res. Lett.,
40, 1637–1641, https://doi.org/10.1002/grl.50366, 2013.
Kolmašová, I., Santolík, O., Defer, E., Rison, W., Coquillat,
S., Pedeboy, S., Lán, R., Uhlíř, L., Lambert, D., Pinty, J.-P., Prieur, S., and Pont, V.: Lightning initiation: Strong VHF radiation sources accompanying preliminary breakdown pulses during lightning initiation, Sci. Rep., 8, 3650,
https://doi.org/10.1038/s41598-018-21972-z, 2018.
Kolmašová, I., Santolík, O., Defer, E., Kašpar, P.,
Kolínská, A., Pedeboy, S., and Coquillat, S.: Two propagation
scenarios of isolated breakdown lightning processes in failed negative
cloud-to-ground flashes, Geophys. Res. Lett., 47, e2020GL090593,
https://doi.org/10.1029/2020GL090593, 2020.
Kolmašová, I., Soula, S., Santolík, O., Farges, T., Bousquet,
O., Diendorfer, G., Lán, R., and Uhlíř, L.: A frontal thunderstorm with several multi-cell lines found to produce energetic preliminary breakdown, J. Geophys. Res.-Atmos., 127, e2021JD035780, https://doi.org/10.1029/2021JD035780, 2022.
Kudela, K., Chum, J., Kollárik, M., Langer, R., Strhárský, I.,
and Baše, J.: Correlations between secondary cosmic ray rates and
strong electric fields at Lomnický štít, J. Geophys. Res.-Atmos., 122, 10700–10710, https://doi.org/10.1002/2016JD026439, 2017.
Kuroda, Y., Oguri, S., Kato, Y., Nakata, R., Inoue, Y., Ito, C., and Minowa,
M.: Observation of gamma ray bursts at ground level under the thunderclouds,
Phys. Lett. B, 758, 286–291, https://doi.org/10.1016/j.physletb.2016.05.029, 2016.
Lawrence, M. G.: The Relationship between Relative Humidity and the Dew
point Temperature in Moist Air: A Simple Conversion and Applications,
B. Am. Meteorol. Soc., 86, 225–234, https://doi.org/10.1175/BAMS-86-2-225, 2005.
Nag, A. and Rakov, V. A.: Some inferences on the role of lower positive
chargé region in facilitating different types of lightning, Geophys.
Res. Lett., 36, L05815, https://doi.org/10.1029/2008GL036783, 2009.
Novák, P.: The Czech Hydrometeorological Institute's severe storm
nowcasting systém, Atmos. Res., 83, 450–457,
https://doi.org/10.1016/j.atmosres.2005.09.014, 2007.
Novak, P. and Kyznarova, H.: Long-term characteristics of convective storms
in terms of radar data and lightning detection data, Meteorological
bulletin, Vol. 73, Czech Hydrometeorological Institute, Press and Information Department, ISSN 0026-1173, 2020.
Østgaard, N., Christian, H. J., Grove, J. E., Sarria, D., Mezentsev, A.,
Kochkin, P., Lehtinen, N., Quick, M., Al-Nussirat, S., Wulf, E., Genov, G., Ullaland, K., Marisaldi, M., Yang, S., and Blakeslee, R. J.: Gamma ray glow observations at 20-km altitude, J. Geophys. Res.-Atmos., 124, 7236–7254, https://doi.org/10.1029/2019JD030312, 2019.
Parks, G., Mauk, K. B. H., Spiger, R, and Chin, J.: X-ray enhancements
detected during thunderstorm and lightning activities, Geophys. Res. Lett.,
8, 1176–1179, 1981.
Rakov, V. A.: Fundamentals of Lightning, Cambridge University Press,
Cambridge, UK, ISBN 978-1-107-07223-7, 2016.
Rakov, V. A. and Uman, M. A.: Lightning – Physics and effects, Cambridge
University Press, ISBN 9780521583275, 2003.
Rakov, V. A., Thottappillil, R., and Uman, M. A.: Electric field pulses in K
and M changes of lightning ground flashes, J. Geophys. Res., 97, 9935–9950,
1992.
Ryzhkov, A. V. and Zrnic, D. S.: Radar Polarimetry for Weather Observations,
Springer, Berlin/Heidelberg, Germany, vol. 486, ISBN 978-3-030-05093-1, 2019.
Sato, T.: Analytical Model for Estimating Terrestrial Cosmic Ray Fluxes
Nearly Anytime and Anywhere in the World: Extension of PARMA/EXPACS, PLOS
ONE, 10, e0144679, https://doi.org/10.1371/journal.pone.0144679, 2015.
Sato, T.: Analytical Model for Estimating the Zenith Angle Dependence of
Terrestrial Cosmic Ray Fluxes, PLOS ONE, 11, e0160390, https://doi.org/10.1371/journal.pone.0160390, 2016.
Sato, T., Iwamoto, Y., Hashimoto, S., Ogawa, T., Furuta, T., Abe, S., Kai, T., Tsai, P.-E., Matsuda, N., Iwase, H., Shigyo, N., Sihver, L., and Niita, K.: Features of Particle and Heavy Ion Transport code System (PHITS) version 3.02, J. Nucl. Sci. Technol., 55, 684–690, https://doi.org/10.1080/00223131.2017.1419890, 2018.
Schwalt, L., Pack, S., and Schulz, W.: Ground truth data of atmospheric
discharges in correlation with LLS detections, Electr. Pow. Syst.
Res., 180, 106065, https://doi.org/10.1016/j.epsr.2019.106065, 2020.
Shepetov, A., Antonova, V., Kalikulov, O. Kryakunova, O., Karashtin, A.,
Lutsenko, V., Mamina, S., Mukashev, K., Piscal, V., Ptitsyn, M., Ryabov, V.,
Sadykov, T., Saduev, N. Salikhov, N., Shlyugaev, Y., Vildanova, L., Zhukov,
V., and Gurevich, A.: The prolonged gamma ray enhancement and the short radiation burst events observed in thunderstorms at Tien Shan, Atmos. Res.,
248, 105266, https://doi.org/10.1016/j.atmosres.2020.105266, 2021.
Shupe, M. D., Kollias, P., Matrosov, S. Y., and Schneider, T. L.: Deriving
Mixed-Phase Cloud Properties from Doppler Radar Spectra, J. Atmos. Ocean.
Technol. 21, 660–670, 2004.
Šlegl, J., Minářová, J., Kuča, P., Kolmašová,
I., Santolík, O., Sokol, Z., Reitz, G., Ambrožová, I., and Ploc, O.: Response of the Czech RMN network to thunderstorm activity, Radiat. Prot. Dosim., 186, 215–218, 2019.
Soghomonyan, S., Chilingarian, A., and Khanikyants, Y.: Dataset for Thunderstorm Ground Enhancements terminated by lightning discharges, Mendeley Data, V1 [data set], https://doi.org/10.17632/p25bb7jrfp.1, 2021.
Sokol, Z., Minářová, J., and Novák, P.: Classification of
Hydrometeors Using Measurements of the Ka-Band Cloud Radar Installed at the
Milešovka Mountain (Central Europe), Remote Sens., 10, 1674,
https://doi.org/10.3390/rs10111674, 2018.
Sokol, Z., Minářová, J., and Fišer, O.: Hydrometeor
Distribution and Linear Depolarization Ratio in Thunderstorms, Remote
Sens., 12, 2144, https://doi.org/10.3390/rs12132144, 2020.
Takahashi, T.: Riming Electrification as a Charge Generation Mechanism in
Thunderstorms, J. Atmos. Sci., 35, 1536–1548,
https://doi.org/10.1175/1520-0469(1978)035<1536:REAACG>2.0.CO;2, 1978.
Torii, T., Sugita, T., Tanabe, S., Kimura, Y., Kamogawa, M., Yajima, K., and
Yasuda, H.: Gradual increase of energetic radiation associated with
thunderstorm activity at the top of Mt. Fuji, Geophys. Res. Lett., 36,
L13804, https://doi.org/10.1029/2008GL037105, 2009.
Tsuchiya, H., Enoto, T., Yamada, S., Yuasa, T., Nakazawa, K., Kitaguchi,
T., Kawaharada, M., Kokubun, M., Kato, H., Okano, M., and Makishima, K.: Long duration γ ray emissions from 2007 and 2008 winter thunderstorms, J. Geophys. Res., 116, D09113, https://doi.org/10.1029/2010JD015161, 2011.
Wilson, C. T. R.: The acceleration of particles in strong electric fields
such as those of thunderclouds, Proc. Cambridge Philos. Soc., 22, 534–538,
1925.
Zhou, X. X., Wang, X. J., Huang, D. H., and Jia, H. Y.: Effect of near-earth
thunderstorms electric field on the intensity of ground cosmic ray
positrons/electrons in Tibet, Astropart. Phys., 84, 107–114,
https://doi.org/10.1016/j.astropartphys.2016.08.004, 2016.
Short summary
Gamma ray radiation related to thunderstorms was previously observed at the high-altitude mountain observatories or on the western coast of Japan, usually being terminated by lightning discharges. We show unusual observations of gamma rays at an altitude below 1000 m, coinciding with peculiar rapid variations in the vertical electric field, which are linked to inverted intracloud lightning discharges. This indicates that a strong, lower positive-charge region was present inside the thundercloud.
Gamma ray radiation related to thunderstorms was previously observed at the high-altitude...
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