Articles | Volume 23, issue 6
https://doi.org/10.5194/acp-23-3409-2023
© Author(s) 2023. 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-23-3409-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 Mar 2023
Research article |
| 20 Mar 2023
| 20 Mar 2023
Vehicle-based in situ observations of the water vapor isotopic composition across China: spatial and seasonal distributions and controls
Di Wang
CORRESPONDING AUTHOR
Institute of International Rivers and Eco-security, Yunnan
University, Kunming 650500, Yunnan, China
Laboratoire de Météorologie Dynamique, IPSL, CNRS, Sorbonne
Université, Campus Pierre et Marie Curie, Paris 75005, France
Yunnan Key Laboratory of International Rivers and Transboundary
Eco-security, Kunming 650500, Yunnan, China
Institute of International Rivers and Eco-security, Yunnan
University, Kunming 650500, Yunnan, China
Yunnan Key Laboratory of International Rivers and Transboundary
Eco-security, Kunming 650500, Yunnan, China
Camille Risi
Laboratoire de Météorologie Dynamique, IPSL, CNRS, Sorbonne
Université, Campus Pierre et Marie Curie, Paris 75005, France
Xuejie Wang
Institute of International Rivers and Eco-security, Yunnan
University, Kunming 650500, Yunnan, China
Yunnan Key Laboratory of International Rivers and Transboundary
Eco-security, Kunming 650500, Yunnan, China
Jiangpeng Cui
Sino-French Institute for Earth System Science, College of Urban
and Environmental Sciences, Peking University, Beijing 100871, China
Gabriel J. Bowen
Department of Geology and Geophysics, and Global Change and
Sustainability Center, University of Utah, Salt Lake City, Utah 84108, USA
Kei Yoshimura
Institute of Industrial Science, The University of Tokyo,
Tokyo 113-8654, Japan
Zhongwang Wei
School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou
510275, Guangdong, China
Laurent Z. X. Li
Laboratoire de Météorologie Dynamique, IPSL, CNRS, Sorbonne
Université, Campus Pierre et Marie Curie, Paris 75005, France
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Alexandre Cauquoin and Camille Risi
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2017-178, https://doi.org/10.5194/gmd-2017-178, 2017
Revised manuscript not accepted
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AGCMs are known to have a warm and isotopically enriched bias over Antarctica. We test here the hypothesis that these biases are consequences of a too diffusive advection. We show here that a good representation of the advection, especially on the horizontal, is very important to reduce the bias in the isotopic contents of precipitation above this area and to improve the modelled water isotopes – temperature relationship, essential when using GCMs for paleoclimate applications.
Erik Oerter, Molly Malone, Annie Putman, Dina Drits-Esser, Louisa Stark, and Gabriel Bowen
Hydrol. Earth Syst. Sci., 21, 3799–3810, https://doi.org/10.5194/hess-21-3799-2017, https://doi.org/10.5194/hess-21-3799-2017, 2017
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Fruits take up soil water as they grow, and thus the fruit water is related to the rain or irrigation the crop receives. We used a novel sampling system to measure the stable isotopes of H and O in the fruit water to determine its geographic origin by comparing it to maps of isotopes in rain. We used this approach to teach an audience of science students and teachers about water cycle concepts and how humans may modify the water cycle through agriculture and irrigation water diversions.
Atsushi Okazaki and Kei Yoshimura
Clim. Past, 13, 379–393, https://doi.org/10.5194/cp-13-379-2017, https://doi.org/10.5194/cp-13-379-2017, 2017
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Data assimilation has been successfully applied in the field of paleoclimatology to reconstruct past climate. However, data reconstructed from proxies have been assimilated, as opposed to the actual proxy values, which prevented full utilization of the information recorded in the proxies. This study propose a new data assimilation system in which actual proxy data are directly assimilated.
Hongbo Zhang, Fan Zhang, Guoqing Zhang, Xiaobo He, and Lide Tian
Atmos. Chem. Phys., 16, 13681–13696, https://doi.org/10.5194/acp-16-13681-2016, https://doi.org/10.5194/acp-16-13681-2016, 2016
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Based on MODIS LST, clouds are believed to affect Tair estimation; however, understanding of the cloud effect on the Tair–LST relationship remains limited. Our paper reveals the subtle influence of clouds that affects Tmin and Tmax estimation in clearly different ways. The results contribute to better understanding of cloud effects and more accurate estimation of Tair using satellite LST.
Timothé Bolliet, Patrick Brockmann, Valérie Masson-Delmotte, Franck Bassinot, Valérie Daux, Dominique Genty, Amaelle Landais, Marlène Lavrieux, Elisabeth Michel, Pablo Ortega, Camille Risi, Didier M. Roche, Françoise Vimeux, and Claire Waelbroeck
Clim. Past, 12, 1693–1719, https://doi.org/10.5194/cp-12-1693-2016, https://doi.org/10.5194/cp-12-1693-2016, 2016
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This paper presents a new database of past climate proxies which aims to facilitate the distribution of data by using a user-friendly interface. Available data from the last 40 years are often fragmented, with lots of different formats, and online libraries are sometimes nonintuitive. We thus built a new dynamic web portal for data browsing, visualizing, and batch downloading of hundreds of datasets presenting a homogeneous format.
Hemmo A. Abels, Vittoria Lauretano, Anna E. van Yperen, Tarek Hopman, James C. Zachos, Lucas J. Lourens, Philip D. Gingerich, and Gabriel J. Bowen
Clim. Past, 12, 1151–1163, https://doi.org/10.5194/cp-12-1151-2016, https://doi.org/10.5194/cp-12-1151-2016, 2016
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Ancient greenhouse warming episodes are studied in river floodplain sediments in the western interior of the USA. Paleohydrological changes of four smaller warming episodes are revealed to be the opposite of those of the largest, most-studied event. Carbon cycle tracers are used to ascertain whether the largest event was a similar event but proportional to the smaller ones or whether this event was distinct in size as well as in carbon sourcing, a question the current work cannot answer.
Yong Chen, Xiang-Kai Li, Jing Si, Guang-Jian WU, Li-De Tian, and Shu-Rong Xiang
Biogeosciences Discuss., https://doi.org/10.5194/bg-2015-637, https://doi.org/10.5194/bg-2015-637, 2016
Revised manuscript not accepted
S. Jasechko, A. Lechler, F. S. R. Pausata, P. J. Fawcett, T. Gleeson, D. I. Cendón, J. Galewsky, A. N. LeGrande, C. Risi, Z. D. Sharp, J. M. Welker, M. Werner, and K. Yoshimura
Clim. Past, 11, 1375–1393, https://doi.org/10.5194/cp-11-1375-2015, https://doi.org/10.5194/cp-11-1375-2015, 2015
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In this study we compile global isotope proxy records of climate changes from the last ice age to the late-Holocene preserved in cave calcite, glacial ice and groundwater aquifers. We show that global patterns of late-Pleistocene to late-Holocene precipitation isotope shifts are consistent with stronger-than-modern isotopic distillation of air masses during the last ice age, likely impacted by larger global temperature differences between the tropics and the poles.
E.-C. Chang and K. Yoshimura
Geosci. Model Dev., 8, 3247–3255, https://doi.org/10.5194/gmd-8-3247-2015, https://doi.org/10.5194/gmd-8-3247-2015, 2015
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In this study, the non-iteration dimensional-split semi-Lagrangian (NDSL) advection scheme is applied to the National Centers for Environmental Prediction (NCEP) Regional Spectral Model (RSM) to alleviate the Gibbs phenomenon. The model runs for the Fukushima accident case study suggest that the NDSL can successfully advect radioactive tracers (iodine-131 and cesium-137) without noise from the Gibbs phenomenon.
W. Yu, L. Tian, Y. Ma, B. Xu, and D. Qu
Atmos. Chem. Phys., 15, 10251–10262, https://doi.org/10.5194/acp-15-10251-2015, https://doi.org/10.5194/acp-15-10251-2015, 2015
Y. Chen, X.-K. Li, J. Si, G.-J. Wu, L.-D. Tian, and S.-R. Xiang
Biogeosciences Discuss., https://doi.org/10.5194/bgd-11-14531-2014, https://doi.org/10.5194/bgd-11-14531-2014, 2014
Revised manuscript not accepted
M. Berkelhammer, A. Sinha, M. Mudelsee, H. Cheng, K. Yoshimura, and J. Biswas
Clim. Past, 10, 733–744, https://doi.org/10.5194/cp-10-733-2014, https://doi.org/10.5194/cp-10-733-2014, 2014
W. C. Clyde, P. D. Gingerich, S. L. Wing, U. Röhl, T. Westerhold, G. Bowen, K. Johnson, A. A. Baczynski, A. Diefendorf, F. McInerney, D. Schnurrenberger, A. Noren, K. Brady, and the BBCP Science Team
Sci. Dril., 16, 21–31, https://doi.org/10.5194/sd-16-21-2013, https://doi.org/10.5194/sd-16-21-2013, 2013
C. Risi, A. Landais, R. Winkler, and F. Vimeux
Clim. Past, 9, 2173–2193, https://doi.org/10.5194/cp-9-2173-2013, https://doi.org/10.5194/cp-9-2173-2013, 2013
L. Zhao, L. Tian, T. Zwinger, R. Ding, J. Zong, Q. Ye, and J. C. Moore
The Cryosphere Discuss., https://doi.org/10.5194/tcd-7-145-2013, https://doi.org/10.5194/tcd-7-145-2013, 2013
Revised manuscript not accepted
M. Schneider, S. Barthlott, F. Hase, Y. González, K. Yoshimura, O. E. García, E. Sepúlveda, A. Gomez-Pelaez, M. Gisi, R. Kohlhepp, S. Dohe, T. Blumenstock, A. Wiegele, E. Christner, K. Strong, D. Weaver, M. Palm, N. M. Deutscher, T. Warneke, J. Notholt, B. Lejeune, P. Demoulin, N. Jones, D. W. T. Griffith, D. Smale, and J. Robinson
Atmos. Meas. Tech., 5, 3007–3027, https://doi.org/10.5194/amt-5-3007-2012, https://doi.org/10.5194/amt-5-3007-2012, 2012
Related subject area
Subject: Isotopes | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
Using carbon-14 and carbon-13 measurements for source attribution of atmospheric methane in the Athabasca oil sands region
Experimental investigation of the stable water isotope distribution in an Alpine lake environment (L-WAIVE)
Craig–Gordon model validation using stable isotope ratios in water vapor over the Southern Ocean
Moisture origin as a driver of temporal variabilities of the water vapour isotopic composition in the Lena River Delta, Siberia
Meridional and vertical variations of the water vapour isotopic composition in the marine boundary layer over the Atlantic and Southern Ocean
Vertical profile observations of water vapor deuterium excess in the lower troposphere
A new interpretative framework for below-cloud effects on stable water isotopes in vapour and rain
Isotopic composition of daily precipitation along the southern foothills of the Himalayas: impact of marine and continental sources of atmospheric moisture
The stable isotopic composition of water vapour above Corsica during the HyMeX SOP1 campaign: insight into vertical mixing processes from lower-tropospheric survey flights
Annual variation in event-scale precipitation δ2H at Barrow, AK, reflects vapor source region
Interpreting the 13C ∕ 12C ratio of carbon dioxide in an urban airshed in the Yangtze River Delta, China
The influence of snow sublimation and meltwater evaporation on δD of water vapor in the atmospheric boundary layer of central Europe
Continuous measurements of isotopic composition of water vapour on the East Antarctic Plateau
Investigating the source, transport, and isotope composition of water vapor in the planetary boundary layer
Detecting moisture transport pathways to the subtropical North Atlantic free troposphere using paired H2O-δD in situ measurements
Toward consistency between trends in bottom-up CO2 emissions and top-down atmospheric measurements in the Los Angeles megacity
Isotopic signatures of production and uptake of H2 by soil
Simultaneous monitoring of stable oxygen isotope composition in water vapour and precipitation over the central Tibetan Plateau
Deuterium excess in the atmospheric water vapour of a Mediterranean coastal wetland: regional vs. local signatures
Factors controlling temporal variability of near-ground atmospheric 222Rn concentration over central Europe
The isotopic composition of water vapour and precipitation in Ivittuut, southern Greenland
Deuterium excess as a proxy for continental moisture recycling and plant transpiration
On the variability of atmospheric 222Rn activity concentrations measured at Neumayer, coastal Antarctica
Precipitation isoscape of high reliefs: interpolation scheme designed and tested for monthly resolved precipitation oxygen isotope records of an Alpine domain
Kinetic fractionation of gases by deep air convection in polar firn
Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet
Determining water sources in the boundary layer from tall tower profiles of water vapor and surface water isotope ratios after a snowstorm in Colorado
Temporal evolution of stable water isotopologues in cloud droplets in a hill cap cloud in central Europe (HCCT-2010)
Stable water isotopologue ratios in fog and cloud droplets of liquid clouds are not size-dependent
Change of the Asian dust source region deduced from the composition of anthropogenic radionuclides in surface soil in Mongolia
A map of radon flux at the Australian land surface
Regina Gonzalez Moguel, Felix Vogel, Sébastien Ars, Hinrich Schaefer, Jocelyn C. Turnbull, and Peter M. J. Douglas
Atmos. Chem. Phys., 22, 2121–2133, https://doi.org/10.5194/acp-22-2121-2022, https://doi.org/10.5194/acp-22-2121-2022, 2022
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Evaluating methane (CH4) sources in the Athabasca oil sands region (AOSR) is crucial to effectively mitigate CH4 emissions. We tested the use of carbon isotopes to estimate source contributions from key CH4 sources in the AOSR and found that 56 ± 18 % of CH4 emissions originated from surface mining and processing facilities, 34 ± 18 % from tailings ponds, and 10 ± < 1 % from wetlands, confirming previous findings and showing that this method can be successfully used to partition CH4 sources.
Patrick Chazette, Cyrille Flamant, Harald Sodemann, Julien Totems, Anne Monod, Elsa Dieudonné, Alexandre Baron, Andrew Seidl, Hans Christian Steen-Larsen, Pascal Doira, Amandine Durand, and Sylvain Ravier
Atmos. Chem. Phys., 21, 10911–10937, https://doi.org/10.5194/acp-21-10911-2021, https://doi.org/10.5194/acp-21-10911-2021, 2021
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To gain understanding on the vertical structure of atmospheric water vapour above mountain lakes and to assess its link to the isotopic composition of the lake water and small-scale dynamics, the L-WAIVE field campaign was conducted in the Annecy valley in the French Alps in June 2019. Based on a synergy between ground-based, boat-borne, and airborne measuring platforms, significant gradients of isotopic content have been revealed at the transitions to the lake and to the free troposphere.
Shaakir Shabir Dar, Prosenjit Ghosh, Ankit Swaraj, and Anil Kumar
Atmos. Chem. Phys., 20, 11435–11449, https://doi.org/10.5194/acp-20-11435-2020, https://doi.org/10.5194/acp-20-11435-2020, 2020
Jean-Louis Bonne, Hanno Meyer, Melanie Behrens, Julia Boike, Sepp Kipfstuhl, Benjamin Rabe, Toni Schmidt, Lutz Schönicke, Hans Christian Steen-Larsen, and Martin Werner
Atmos. Chem. Phys., 20, 10493–10511, https://doi.org/10.5194/acp-20-10493-2020, https://doi.org/10.5194/acp-20-10493-2020, 2020
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This study introduces 2 years of continuous near-surface in situ observations of the stable isotopic composition of water vapour in parallel with precipitation in north-eastern Siberia. We evaluate the atmospheric transport of moisture towards the region of our observations with simulations constrained by meteorological reanalyses and use this information to interpret the temporal variations of the vapour isotopic composition from seasonal to synoptic timescales.
Iris Thurnherr, Anna Kozachek, Pascal Graf, Yongbiao Weng, Dimitri Bolshiyanov, Sebastian Landwehr, Stephan Pfahl, Julia Schmale, Harald Sodemann, Hans Christian Steen-Larsen, Alessandro Toffoli, Heini Wernli, and Franziska Aemisegger
Atmos. Chem. Phys., 20, 5811–5835, https://doi.org/10.5194/acp-20-5811-2020, https://doi.org/10.5194/acp-20-5811-2020, 2020
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Stable water isotopes (SWIs) are tracers of moist atmospheric processes. We analyse the impact of large- to small-scale atmospheric processes and various environmental conditions on the variability of SWIs using ship-based SWI measurement in water vapour from the Atlantic and Southern Ocean. Furthermore, simultaneous measurements of SWIs at two altitudes are used to illustrate the potential of such measurements for future research to estimate sea spray evaporation and turbulent moisture fluxes.
Olivia E. Salmon, Lisa R. Welp, Michael E. Baldwin, Kristian D. Hajny, Brian H. Stirm, and Paul B. Shepson
Atmos. Chem. Phys., 19, 11525–11543, https://doi.org/10.5194/acp-19-11525-2019, https://doi.org/10.5194/acp-19-11525-2019, 2019
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We conducted airborne vertical profile measurements of water vapor stable isotopes to examine how boundary layer, cloud, and mixing processes influence the vertical structure of deuterium excess in the lower troposphere. We discuss reasons our observations are consistent with water vapor isotope theory on some days and not others. Deuterium excess may be useful for understanding complex processes occurring at the top of the boundary layer, including cloud formation, evaporation, and air mixing.
Pascal Graf, Heini Wernli, Stephan Pfahl, and Harald Sodemann
Atmos. Chem. Phys., 19, 747–765, https://doi.org/10.5194/acp-19-747-2019, https://doi.org/10.5194/acp-19-747-2019, 2019
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This article studies the interaction between falling rain and vapour with stable water isotopes. In particular, rain evaporation is relevant for several atmospheric processes, but remains difficult to quantify. A novel framework is introduced to facilitate the interpretation of stable water isotope observations in near-surface vapour and rain. The usefulness of this concept is demonstrated using observations at high time resolution from a cold front. Sensitivities are tested with a simple model.
Ghulam Jeelani, Rajendrakumar D. Deshpande, Michal Galkowski, and Kazimierz Rozanski
Atmos. Chem. Phys., 18, 8789–8805, https://doi.org/10.5194/acp-18-8789-2018, https://doi.org/10.5194/acp-18-8789-2018, 2018
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Analysis of stable isotope composition of daily precipitation collected along the southern foothills of the Himalayas was used to gain deeper insight into the mechanisms controlling isotopic composition of precipitation. The results suggested that the decrease in isotopic composition in the course of ISM evolution stems from large-scale recycling of moisture-driven monsoonal circulation. High d-excess of rainfall is attributed to moisture of continental origin released into the atmosphere.
Harald Sodemann, Franziska Aemisegger, Stephan Pfahl, Mark Bitter, Ulrich Corsmeier, Thomas Feuerle, Pascal Graf, Rolf Hankers, Gregor Hsiao, Helmut Schulz, Andreas Wieser, and Heini Wernli
Atmos. Chem. Phys., 17, 6125–6151, https://doi.org/10.5194/acp-17-6125-2017, https://doi.org/10.5194/acp-17-6125-2017, 2017
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We report here the first survey of stable water isotope composition over the Mediterranean sea made from aircraft. The stable isotope composition of the atmospheric water vapour changed in response to evaporation conditions at the sea surface, elevation, and airmass transport history. Our data set will be valuable for testing how water is transported in weather prediction and climate models and for understanding processes in the Mediterranean water cycle.
Annie L. Putman, Xiahong Feng, Leslie J. Sonder, and Eric S. Posmentier
Atmos. Chem. Phys., 17, 4627–4639, https://doi.org/10.5194/acp-17-4627-2017, https://doi.org/10.5194/acp-17-4627-2017, 2017
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Water vapor source and transport are linked to the stable isotopes of precipitation of 70 storms at Barrow, AK, USA. Barrow's vapor came from the North Pacific in winter and the Arctic Ocean in summer. Half the isotopic variability was explained by the size of the temperature drop from the vapor source to Barrow, the evaporation conditions, and whether the vapor traveled over mountains. Because isotopes reflect the regional meteorology they may be early indicators of Arctic hydroclimatic change.
Jiaping Xu, Xuhui Lee, Wei Xiao, Chang Cao, Shoudong Liu, Xuefa Wen, Jingzheng Xu, Zhen Zhang, and Jiayu Zhao
Atmos. Chem. Phys., 17, 3385–3399, https://doi.org/10.5194/acp-17-3385-2017, https://doi.org/10.5194/acp-17-3385-2017, 2017
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The Yangtze River Delta is one of the most industrialized regions in China. In situ optical isotopic measurement in Nanjing, a city located in the Delta, showed unusually high atmospheric δ13C signals in the summer (−7.44 ‰, July 2013 mean), which we attributed to the influence of cement production in the region. Flux partitioning calculations revealed that natural ecosystems in the region were a negligibly small source of atmospheric CO2.
Emanuel Christner, Martin Kohler, and Matthias Schneider
Atmos. Chem. Phys., 17, 1207–1225, https://doi.org/10.5194/acp-17-1207-2017, https://doi.org/10.5194/acp-17-1207-2017, 2017
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Post-depositional fractionation of stable water isotopes due to fractioning surface evaporation introduces uncertainty to isotope applications such as the reconstruction of paleotemperatures, paleoaltimetry, and the investigation of ground water formation. In this paper we combine measurements of stable water isotopes in near-surface water vapor with a Lagrangian isotope model to investigate isotope fractionation during the evaporation of surface-layer snow in central Europe.
Mathieu Casado, Amaelle Landais, Valérie Masson-Delmotte, Christophe Genthon, Erik Kerstel, Samir Kassi, Laurent Arnaud, Ghislain Picard, Frederic Prie, Olivier Cattani, Hans-Christian Steen-Larsen, Etienne Vignon, and Peter Cermak
Atmos. Chem. Phys., 16, 8521–8538, https://doi.org/10.5194/acp-16-8521-2016, https://doi.org/10.5194/acp-16-8521-2016, 2016
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Climatic conditions in Concordia are very cold (−55 °C in average) and very dry, imposing difficult conditions to measure the water vapour isotopic composition. New developments in infrared spectroscopy enable now the measurement of isotopic composition in water vapour traces (down to 20 ppmv). Here we present the results results of a first campaign of measurement of isotopic composition of water vapour in Concordia, the site where the 800 000 years long ice core was drilled.
Timothy J. Griffis, Jeffrey D. Wood, John M. Baker, Xuhui Lee, Ke Xiao, Zichong Chen, Lisa R. Welp, Natalie M. Schultz, Galen Gorski, Ming Chen, and John Nieber
Atmos. Chem. Phys., 16, 5139–5157, https://doi.org/10.5194/acp-16-5139-2016, https://doi.org/10.5194/acp-16-5139-2016, 2016
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Increasing atmospheric humidity and convective precipitation over land provide evidence of intensification of the hydrologic cycle. We present the first multi-annual isotope (oxygen and deuterium) water vapor observations from a very tall tower (185 m) in the upper Midwest, United States, to diagnose the sources, transport, and fractionation of water vapor in the atmosphere. The results show a relatively high degree of summertime water recycling within the region (~30 % mean and ~60 % maximum).
Yenny González, Matthias Schneider, Christoph Dyroff, Sergio Rodríguez, Emanuel Christner, Omaira Elena García, Emilio Cuevas, Juan Jose Bustos, Ramon Ramos, Carmen Guirado-Fuentes, Sabine Barthlott, Andreas Wiegele, and Eliezer Sepúlveda
Atmos. Chem. Phys., 16, 4251–4269, https://doi.org/10.5194/acp-16-4251-2016, https://doi.org/10.5194/acp-16-4251-2016, 2016
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Measurements of water vapour isotopologues, dust, and a back trajectory model were used to identify moisture pathways in the subtropical North Atlantic. Dry air masses, from condensation at low temperatures, are transported from high altitudes and latitudes. The humid sources are related to the mixture, with lower and more humid air during transport. Rain re-evaporation was an occasional source of moisture. In summer, an important humidity source is the strong dry convection over the Sahara.
Sally Newman, Xiaomei Xu, Kevin R. Gurney, Ying Kuang Hsu, King Fai Li, Xun Jiang, Ralph Keeling, Sha Feng, Darragh O'Keefe, Risa Patarasuk, Kam Weng Wong, Preeti Rao, Marc L. Fischer, and Yuk L. Yung
Atmos. Chem. Phys., 16, 3843–3863, https://doi.org/10.5194/acp-16-3843-2016, https://doi.org/10.5194/acp-16-3843-2016, 2016
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Combining 14C and 13C data from the Los Angeles, CA megacity with background data allows source attribution of CO2 emissions among biosphere, natural gas, and gasoline. The 8-year record of CO2 emissions from fossil fuel burning is consistent with "The Great Recession" of 2008–2010. The long-term trend and source attribution are consistent with government inventories. Seasonal patterns agree with the high-resolution Hestia-LA emission data product, when seasonal wind directions are considered.
Q. Chen, M. E. Popa, A. M. Batenburg, and T. Röckmann
Atmos. Chem. Phys., 15, 13003–13021, https://doi.org/10.5194/acp-15-13003-2015, https://doi.org/10.5194/acp-15-13003-2015, 2015
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We investigated soil production and uptake of H2 and associated isotope effects. Uptake and emission of H2 occurred simultaneously at all sampling sites, with strongest emission where N2 fixing legume was present. The fractionation constant during soil uptake was about 0.945 and it did not show positive correlation with deposition velocity. The isotopic composition of H2 emitted from soil with legume was about -530‰, which is less deuterium-depleted than isotope equilibrium between H2O and H2.
W. Yu, L. Tian, Y. Ma, B. Xu, and D. Qu
Atmos. Chem. Phys., 15, 10251–10262, https://doi.org/10.5194/acp-15-10251-2015, https://doi.org/10.5194/acp-15-10251-2015, 2015
H. Delattre, C. Vallet-Coulomb, and C. Sonzogni
Atmos. Chem. Phys., 15, 10167–10181, https://doi.org/10.5194/acp-15-10167-2015, https://doi.org/10.5194/acp-15-10167-2015, 2015
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Based on summer measurements of δ18O and δD in the atmospheric vapour of a Mediterranean coastal wetland exposed to high evaporation, this paper explores the main drivers of isotopic signal variability. After having classified the data according to the main regional air mass trajectories, average diurnal cycles are discussed with regards to the contribution of local evaporation to the ground level atmospheric vapour.
M. Zimnoch, P. Wach, L. Chmura, Z. Gorczyca, K. Rozanski, J. Godlowska, J. Mazur, K. Kozak, and A. Jeričević
Atmos. Chem. Phys., 14, 9567–9581, https://doi.org/10.5194/acp-14-9567-2014, https://doi.org/10.5194/acp-14-9567-2014, 2014
J.-L. Bonne, V. Masson-Delmotte, O. Cattani, M. Delmotte, C. Risi, H. Sodemann, and H. C. Steen-Larsen
Atmos. Chem. Phys., 14, 4419–4439, https://doi.org/10.5194/acp-14-4419-2014, https://doi.org/10.5194/acp-14-4419-2014, 2014
F. Aemisegger, S. Pfahl, H. Sodemann, I. Lehner, S. I. Seneviratne, and H. Wernli
Atmos. Chem. Phys., 14, 4029–4054, https://doi.org/10.5194/acp-14-4029-2014, https://doi.org/10.5194/acp-14-4029-2014, 2014
R. Weller, I. Levin, D. Schmithüsen, M. Nachbar, J. Asseng, and D. Wagenbach
Atmos. Chem. Phys., 14, 3843–3853, https://doi.org/10.5194/acp-14-3843-2014, https://doi.org/10.5194/acp-14-3843-2014, 2014
Z. Kern, B. Kohán, and M. Leuenberger
Atmos. Chem. Phys., 14, 1897–1907, https://doi.org/10.5194/acp-14-1897-2014, https://doi.org/10.5194/acp-14-1897-2014, 2014
K. Kawamura, J. P. Severinghaus, M. R. Albert, Z. R. Courville, M. A. Fahnestock, T. Scambos, E. Shields, and C. A. Shuman
Atmos. Chem. Phys., 13, 11141–11155, https://doi.org/10.5194/acp-13-11141-2013, https://doi.org/10.5194/acp-13-11141-2013, 2013
H. C. Steen-Larsen, S. J. Johnsen, V. Masson-Delmotte, B. Stenni, C. Risi, H. Sodemann, D. Balslev-Clausen, T. Blunier, D. Dahl-Jensen, M. D. Ellehøj, S. Falourd, A. Grindsted, V. Gkinis, J. Jouzel, T. Popp, S. Sheldon, S. B. Simonsen, J. Sjolte, J. P. Steffensen, P. Sperlich, A. E. Sveinbjörnsdóttir, B. M. Vinther, and J. W. C. White
Atmos. Chem. Phys., 13, 4815–4828, https://doi.org/10.5194/acp-13-4815-2013, https://doi.org/10.5194/acp-13-4815-2013, 2013
D. Noone, C. Risi, A. Bailey, M. Berkelhammer, D. P. Brown, N. Buenning, S. Gregory, J. Nusbaumer, D. Schneider, J. Sykes, B. Vanderwende, J. Wong, Y. Meillier, and D. Wolfe
Atmos. Chem. Phys., 13, 1607–1623, https://doi.org/10.5194/acp-13-1607-2013, https://doi.org/10.5194/acp-13-1607-2013, 2013
J. K. Spiegel, F. Aemisegger, M. Scholl, F. G. Wienhold, J. L. Collett Jr., T. Lee, D. van Pinxteren, S. Mertes, A. Tilgner, H. Herrmann, R. A. Werner, N. Buchmann, and W. Eugster
Atmos. Chem. Phys., 12, 11679–11694, https://doi.org/10.5194/acp-12-11679-2012, https://doi.org/10.5194/acp-12-11679-2012, 2012
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Short summary
To better understand the spatial and temporal distribution of vapor isotopes, we present two vehicle-based spatially continuous snapshots of the near-surface vapor isotopes in China during the pre-monsoon and monsoon periods. These observations are explained well by different moisture sources and processes along the air mass trajectories. Our results suggest that proxy records need to be interpreted in the context of regional systems and sources of moisture.
To better understand the spatial and temporal distribution of vapor isotopes, we present two...
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