Articles | Volume 21, issue 1
https://doi.org/10.5194/acp-21-483-2021
© Author(s) 2021. 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-21-483-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jan 2021
Research article |
| 14 Jan 2021
| 14 Jan 2021
Error induced by neglecting subgrid chemical segregation due to inefficient turbulent mixing in regional chemical-transport models in urban environments
Max Planck Institute for Meteorology, Bundesstrasse 53, 20146, Hamburg, Germany
Guy P. Brasseur
Max Planck Institute for Meteorology, Bundesstrasse 53, 20146, Hamburg, Germany
National Center for Atmospheric Research, 1850 Table Mesa Dr, Boulder, CO 80305, USA
Hauke Schmidt
Max Planck Institute for Meteorology, Bundesstrasse 53, 20146, Hamburg, Germany
Juan Pedro Mellado
Department of Physics, Aerospace Engineering Division, Universitat Politècnica de Catalunya, C. Jordi Girona 1–3, 08034, Barcelona, Spain
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A recent development in numerical simulations of the global atmosphere is the increase in horizontal resolution to grid spacings of a few kilometers. However, the vertical grid spacing of these models has not been reduced at the same rate as the horizontal grid spacing. Here, we assess the effects of much finer vertical grid spacings, in particular the impacts on cloud quantities and the atmospheric energy balance.
Jianing Dai, Guy P. Brasseur, Mihalis Vrekoussis, Maria Kanakidou, Kun Qu, Yijuan Zhang, Hongliang Zhang, and Tao Wang
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Kun Qu, Xuesong Wang, Xuhui Cai, Yu Yan, Xipeng Jin, Mihalis Vrekoussis, Maria Kanakidou, Guy P. Brasseur, Jin Shen, Teng Xiao, Limin Zeng, and Yuanhang Zhang
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Sandra Wallis, Hauke Schmidt, and Christian von Savigny
Atmos. Chem. Phys., 23, 7001–7014, https://doi.org/10.5194/acp-23-7001-2023, https://doi.org/10.5194/acp-23-7001-2023, 2023
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Yuting Wang, Yong-Feng Ma, Domingo Muñoz-Esparza, Jianing Dai, Cathy Wing Yi Li, Pablo Lichtig, Roy Chun-Wang Tsang, Chun-Ho Liu, Tao Wang, and Guy Pierre Brasseur
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Mengjiao Jiang, Yaoting Li, Weiji Hu, Yinshan Yang, Guy Brasseur, and Xi Zhao
Atmos. Chem. Phys., 23, 4545–4557, https://doi.org/10.5194/acp-23-4545-2023, https://doi.org/10.5194/acp-23-4545-2023, 2023
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Relatively clean background aerosol over the Tibetan Plateau makes the study of aerosol–cloud–precipitation interactions distinctive. A convection on 24 July 2014 in Naqu was selected using the Weather Research Forecasting (WRF) model, including the Thompson aerosol-aware microphysical scheme. Our study uses a compromise approach to the limited observations. We show that the transformation of cloud water to graupel and the development of convective clouds are favored in a polluted situation.
Cathy Hohenegger, Peter Korn, Leonidas Linardakis, René Redler, Reiner Schnur, Panagiotis Adamidis, Jiawei Bao, Swantje Bastin, Milad Behravesh, Martin Bergemann, Joachim Biercamp, Hendryk Bockelmann, Renate Brokopf, Nils Brüggemann, Lucas Casaroli, Fatemeh Chegini, George Datseris, Monika Esch, Geet George, Marco Giorgetta, Oliver Gutjahr, Helmuth Haak, Moritz Hanke, Tatiana Ilyina, Thomas Jahns, Johann Jungclaus, Marcel Kern, Daniel Klocke, Lukas Kluft, Tobias Kölling, Luis Kornblueh, Sergey Kosukhin, Clarissa Kroll, Junhong Lee, Thorsten Mauritsen, Carolin Mehlmann, Theresa Mieslinger, Ann Kristin Naumann, Laura Paccini, Angel Peinado, Divya Sri Praturi, Dian Putrasahan, Sebastian Rast, Thomas Riddick, Niklas Roeber, Hauke Schmidt, Uwe Schulzweida, Florian Schütte, Hans Segura, Radomyra Shevchenko, Vikram Singh, Mia Specht, Claudia Christine Stephan, Jin-Song von Storch, Raphaela Vogel, Christian Wengel, Marius Winkler, Florian Ziemen, Jochem Marotzke, and Bjorn Stevens
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Models of the Earth system used to understand climate and predict its change typically employ a grid spacing of about 100 km. Yet, many atmospheric and oceanic processes occur on much smaller scales. In this study, we present a new model configuration designed for the simulation of the components of the Earth system and their interactions at kilometer and smaller scales, allowing an explicit representation of the main drivers of the flow of energy and matter by solving the underlying equations.
Shih-Wei Fang, Claudia Timmreck, Johann Jungclaus, Kirstin Krüger, and Hauke Schmidt
Earth Syst. Dynam., 13, 1535–1555, https://doi.org/10.5194/esd-13-1535-2022, https://doi.org/10.5194/esd-13-1535-2022, 2022
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The early 19th century was the coldest period over the past 500 years, when strong tropical volcanic events and a solar minimum coincided. This study quantifies potential surface cooling from the solar and volcanic forcing in the early 19th century with large ensemble simulations, and identifies the regions that their impacts cannot be simply additive. The cooling perspective of Arctic amplification exists in both solar and post-volcano period with the albedo feedback as the main contribution.
Mohammad M. Khabbazan, Marius Stankoweit, Elnaz Roshan, Hauke Schmidt, and Hermann Held
Earth Syst. Dynam., 12, 1529–1542, https://doi.org/10.5194/esd-12-1529-2021, https://doi.org/10.5194/esd-12-1529-2021, 2021
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We ask for an optimal amount of solar radiation management (SRM) in conjunction with mitigation if global warming is limited to 2 °C and regional precipitation anomalies are confined to an amount ethically compatible with the 2 °C target. Then, compared to a scenario without regional targets, most of the SRM usage is eliminated from the portfolio even if transgressing regional targets are tolerated in terms of 1/10 of the standard deviation of natural variability.
Gunter Stober, Ales Kuchar, Dimitry Pokhotelov, Huixin Liu, Han-Li Liu, Hauke Schmidt, Christoph Jacobi, Kathrin Baumgarten, Peter Brown, Diego Janches, Damian Murphy, Alexander Kozlovsky, Mark Lester, Evgenia Belova, Johan Kero, and Nicholas Mitchell
Atmos. Chem. Phys., 21, 13855–13902, https://doi.org/10.5194/acp-21-13855-2021, https://doi.org/10.5194/acp-21-13855-2021, 2021
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Little is known about the climate change of wind systems in the mesosphere and lower thermosphere at the edge of space at altitudes from 70–110 km. Meteor radars represent a well-accepted remote sensing technique to measure winds at these altitudes. Here we present a state-of-the-art climatological interhemispheric comparison using continuous and long-lasting observations from worldwide distributed meteor radars from the Arctic to the Antarctic and sophisticated general circulation models.
Thierno Doumbia, Claire Granier, Nellie Elguindi, Idir Bouarar, Sabine Darras, Guy Brasseur, Benjamin Gaubert, Yiming Liu, Xiaoqin Shi, Trissevgeni Stavrakou, Simone Tilmes, Forrest Lacey, Adrien Deroubaix, and Tao Wang
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Most countries around the world have implemented control measures to combat the spread of the COVID-19 pandemic, resulting in significant changes in economic and personal activities. We developed the CONFORM (COvid-19 adjustmeNt Factors fOR eMissions) dataset to account for changes in emissions during lockdowns. This dataset was created with the intention of being directly applicable to existing global and regional inventories used in chemical transport models.
Clarissa Alicia Kroll, Sally Dacie, Alon Azoulay, Hauke Schmidt, and Claudia Timmreck
Atmos. Chem. Phys., 21, 6565–6591, https://doi.org/10.5194/acp-21-6565-2021, https://doi.org/10.5194/acp-21-6565-2021, 2021
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Volcanic forcing is counteracted by stratospheric water vapor (SWV) entering the stratosphere as a consequence of aerosol-induced cold-point warming. We find that depending on the emission strength, aerosol profile height and season of the eruption, up to 4 % of the tropical aerosol forcing can be counterbalanced. A power function relationship between cold-point warming/SWV forcing and AOD in the yearly average is found, allowing us to estimate the SWV forcing for comparable eruptions.
Yuting Wang, Yong-Feng Ma, Domingo Muñoz-Esparza, Cathy W. Y. Li, Mary Barth, Tao Wang, and Guy P. Brasseur
Atmos. Chem. Phys., 21, 3531–3553, https://doi.org/10.5194/acp-21-3531-2021, https://doi.org/10.5194/acp-21-3531-2021, 2021
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Large-eddy simulations (LESs) were performed in the mountainous region of the island of Hong Kong to investigate the degree to which the rates of chemical reactions between two reactive species are reduced due to the segregation of species within the convective boundary layer. We show that the inhomogeneity in emissions plays an important role in the segregation effect. Topography also has a significant influence on the segregation locally.
Cited articles
Albrecht, B., Fang, M., and Ghate, V.: Exploring Stratocumulus Cloud-Top
Entrainment Processes and Parameterizations by Using Doppler Cloud Radar
Observations, J. Atmos. Sci., 73, 729–742, https://doi.org/10.1175/JAS-D-15-0147.1, 2016. a
Baker, J., Walker, H. L., and Cai, X.: A study of the dispersion and transport of reactive pollutants in and above street canyons – a large eddy simulation, Atmos. Environ., 38, 6883–6892, 2004. a
Barth, M. C., Hess, P. G., and Madronich, S.: Effect of marine boundary layer
clouds on tropospheric chemistry as analyzed in a regional chemistry transport model, J. Geophys. Res.-Atmos., 107, AAC 7-1–AAC 7-12, https://doi.org/10.1029/2001JD000468, 2002. a
Bouarar, I., Petersen, K., Granier, C., Xie, Y., Mijling, B., van der Ronald, A., Gauss, M., Pommier, M., Sofiev, M., Kouznetsov, R., Sudarchikova, N., Wang, L., Zhou, G., and Brasseur, G. P.: Predicting Air Pollution in East Asia, Springer International Publishing, Cham, 387–403, https://doi.org/10.1007/978-3-319-59489-7_18, 2017. a
Brasseur, G. P. and Jacob, D. J.: Modeling of Atmospheric Chemistry, Cambridge University Press, Cambridge, 2017. a
Brosse, F., Leriche, M., Mari, C., and Couvreux, F.: LES study of the impact
of moist thermals on the oxidative capacity of the atmosphere in southern West Africa, Atmos. Chem. Phys., 18, 6601–6624, https://doi.org/10.5194/acp-18-6601-2018, 2018. a
Butler, T. M., Taraborrelli, D., Brühl, C., Fischer, H., Harder, H., Martinez, M., Williams, J., Lawrence, M. G., and Lelieveld, J.: Improved simulation of isoprene oxidation chemistry with the ECHAM5/MESSy chemistry-climate model: lessons from the GABRIEL airborne field campaign, Atmos. Chem. Phys., 8, 4529–4546, https://doi.org/10.5194/acp-8-4529-2008, 2008. a
Chatfield, R. and Brost, R. A.: A two-stream model of the vertical transport of trace species in the convective boundary layer, J. Geophys. Res., 921, 13263–13276, https://doi.org/10.1029/JD092iD11p13263, 1987. a
Danckwerts, P. V.: The definition and measurement of some characteristics of
mixtures, Appl. Sci. Res., 3, 279–296, https://doi.org/10.1007/BF03184936, 1952. a, b
Deardorff, J. W.: Convective Velocity and Temperature Scales for the Unstable
Planetary Boundary Layer and for Rayleigh Convection, J. Atmos. Sci., 27, 1211–1213,
https://doi.org/10.1175/1520-0469(1970)027<1211:CVATSF>2.0.CO;2, 1970. a
Dlugi, R., Berger, M., Zelger, M., Hofzumahaus, A., Rohrer, F., Holland, F., Lu, K., and Kramm, G.: The balances of mixing ratios and segregation intensity: a case study from the field (ECHO 2003), Atmos. Chem. Phys., 14, 10333–10362, https://doi.org/10.5194/acp-14-10333-2014, 2014. a
Dlugi, R., Berger, M., Mallik, C., Tsokankunku, A., Zelger, M., Acevedo,
O. C., Bourtsoukidis, E., Hofzumahaus, A., Kesselmeier, J., Kramm, G., Marno,
D., Martinez, M., Nölscher, A. C., Ouwersloot, H., Pfannerstill, E. Y.,
Rohrer, F., Tauer, S., Williams, J., Yáẽz-Serrano, A.-M., Andreae, M. O.,
Harder, H., and Sörgel, M.: Segregation in the Atmospheric Boundary Layer:
The Case of OH Isoprene, Atmos. Chem. Phys. Discuss. [preprint],
https://doi.org/10.5194/acp-2018-1325, in review, 2019. a, b
Donaldson, C. d. and Hilst, G. R.: Effect of inhomogeneous mixing on
atmospheric photochemical reactions, Environ. Sci. Technol., 6, 812–816, https://doi.org/10.1021/es60068a004, 1972. a
Fedorovich, E., Conzemius, R., and Mironov, D.: Convective Entrainment into a
Shear-Free, Linearly Stratified Atmosphere: Bulk Models Reevaluated through
Large Eddy Simulations, J. Atmos. Sci., 61, 281–295,
https://doi.org/10.1175/1520-0469(2004)061<0281:CEIASL>2.0.CO;2, 2004. a
Fitzjarrald, D. R. and Lenschow, D. H.: Mean concentration and flux profiles
for chemically reactive species in the atmospheric surface layer, Atmos. Environ., 17, 2505–2512, https://doi.org/10.1016/0004-6981(83)90076-8, 1983. a
Freitas, S. R., Longo, K. M., Alonso, M. F., Pirre, M., Marecal, V., Grell, G., Stockler, R., Mello, R. F., and Sánchez Gácita, M.: PREP-CHEM-SRC 1.0: a preprocessor of trace gas and aerosol emission fields for regional and global atmospheric chemistry models, Geosci. Model Dev., 4, 419–433, https://doi.org/10.5194/gmd-4-419-2011, 2011. a
Geyer, A. and Stutz, J.: The vertical structure of
Hobbs, P. V.: Basic physical chemistry for the atmospheric sciences, Cambridge University Press, Cambridge, 2000. a
Hong, S.-Y., Noh, Y., and Dudhia, J.: A new vertical diffusion package with an explicit treatment of entrainment processes, Mon. Weather Rev., 134,
2318–2341, 2006. a
Huszar, P., Karlický, J., Ďoubalová, J., Šindelářová, K., Nováková, T., Belda, M., Halenka, T., Žák, M., and Pišoft, P.: Urban canopy meteorological forcing and its impact on ozone and PM2.5: role of vertical turbulent transport, Atmos. Chem. Phys., 20, 1977–2016, https://doi.org/10.5194/acp-20-1977-2020, 2020. a
Jacobson, M. Z. and Jacobson, M. Z.: Fundamentals of atmospheric modeling,
Cambridge University Press, Cambridge, 2005. a
Jonker, H. J., van Reeuwijk, M., Sullivan, P. P., and Patton, E.: Interfacial
layers in clear and cloudy atmospheric boundary layers, in: THMT-12.
Proceedings of the Seventh International Symposium On Turbulence Heat and
Mass Transfer, Begel House Inc., 24–27 September 2012, Palermo, Italy, 2012. a
Jonker, H. J., van Reeuwijk, M., Sullivan, P. P., and Patton, E. G.: On the
scaling of shear-driven entrainment: a DNS study, J. Fluid Mech., 732, 150–165, https://doi.org/10.1017/jfm.2013.394, 2013. a
Karamchandani, P., Santos, L., Sykes, I., Zhang, Y., Tonne, C., and Seigneur, C.: Development and evaluation of a state-of-the-science reactive plume model, Environ. Sci. Technol, 34, 870–880, 2000. a
Karl, M., Brauers, T., Dorn, H.-P., Holland, F., Komenda, M., Poppe, D.,
Rohrer, F., Rupp, L., Schaub, A., and Wahner, A.: Kinetic Study of the
OH-isoprene and O3-isoprene reaction in the atmosphere simulation chamber,
SAPHIR, Geophys. Res. Lett., 31, L05117, https://doi.org/10.1029/2003GL019189, 2004. a
Kaser, L., Karl, T., Yuan, B., Mauldin III, R., Cantrell, C., Guenther, A.,
Patton, E., Weinheimer, A., Knote, C., Orlando, J., Emmons, L., Apel, E., Hornbrook, R., Shertz, S., Ullmann, K., Hall, S., Graus, M., de Gouw, J., Zhou, X., and Ye, C.: Chemistry-turbulence interactions and mesoscale variability influence the cleansing efficiency of the atmosphere, Geophys. Res. Lett., 42, 10894–10903, 2015. a
Kim, S.-W., Barth, M. C., and Trainer, M.: Impact of turbulent mixing on
isoprene chemistry, Geophys. Res. Lett., 43, 7701–7708, https://doi.org/10.1002/2016GL069752, 2016. a, b, c
Lenschow, D. H., Gurarie, D., and Patton, E. G.: Modeling the diurnal cycle of conserved and reactive species in the convective boundary layer using SOMCRUS, Geosci. Model Dev., 9, 979–996, https://doi.org/10.5194/gmd-9-979-2016, 2016. a
Li, C. W. Y.: Supplementary Material for Error induced by neglecting subgrid chemical segregation due to inefficient turbulent mixing in regional chemical-transport models in urban environments, available at:
http://hdl.handle.net/21.11116/0000-0006-11C3-A, last access: 13 January 2021. a
Li, Y., Barth, M. C., and Steiner, A. L.: Comparing turbulent mixing of
atmospheric oxidants across model scales, Atmos. Environ., 199, 88–101, 2019. a
Manion, J. A., Huie, R. E., Levin, R. D., Burgess Jr., D. R., Orkin, V. L., Tsang, W., McGivern, W. S., Hudgens, J. W., Knyazev, V. D., Atkinson, D. B., Chai, E., Tereza, A. M., Lin, C.-Y., Allison, T. C., Mallard, W. G., Westley, F., Herron, J. T., Hampson, R. F., and Frizzell, D. H.: NIST Chemical Kinetics Database, NIST Standard Reference Database 17, Version 7.0 (Web Version), Release 1.6.8, Data version 2015.09, National Institute of Standards and Technology, Gaithersburg, Maryland, available at: https://kinetics.nist.gov/ (last access: 13 January 2021), 2008. a
Marécal, V., Peuch, V.-H., Andersson, C., Andersson, S., Arteta, J.,
Beekmann, M., Benedictow, A., Bergström, R., Bessagnet, B., Cansado, A.,
Chéroux, F., Colette, A., Coman, A., Curier, R. L., Denier van der Gon, H. A. C., Drouin, A., Elbern, H., Emili, E., Engelen, R. J., Eskes, H. J., Foret, G., Friese, E., Gauss, M., Giannaros, C., Guth, J., Joly, M., Jaumouillé, E., Josse, B., Kadygrov, N., Kaiser, J. W., Krajsek, K., Kuenen, J., Kumar, U., Liora, N., Lopez, E., Malherbe, L., Martinez, I., Melas, D., Meleux, F., Menut, L., Moinat, P., Morales, T., Parmentier, J., Piacentini, A., Plu, M., Poupkou, A., Queguiner, S., Robertson, L., Rouïl, L., Schaap, M., Segers, A., Sofiev, M., Tarasson, L., Thomas, M., Timmermans, R., Valdebenito, Á., van Velthoven, P., van Versendaal, R., Vira, J., and Ung, A.: A regional air quality forecasting system over Europe: the MACC-II daily ensemble production, Geosci. Model Dev., 8, 2777–2813, https://doi.org/10.5194/gmd-8-2777-2015, 2015. a
Mellado, J.: Using Numerical Simulations to Study the Atmospheric Boundary
Layer, in: ERCOFTAC Workshop Direct and Large Eddy Simulation, Springer, Cham, 1–10, 2019. a
Mellado, J. P.: The evaporatively driven cloud-top mixing layer, J. Fluid Mech., 660, 5–36, 2010. a
Mellado, J. P.: Direct numerical simulation of free convection over a heated
plate, J. Fluid Mech., 712, 418–450, 2012. a
Mellado, J. P.: Cloud-Top Entrainment in Stratocumulus Clouds, Annu. Rev.
Fluid Mech., 49, 145–169, https://doi.org/10.1146/annurev-fluid-010816-060231, 2017. a
Mellado, J. P. and Ansorge, C.: Factorization of the Fourier transform of the
pressure-Poisson equation using finite differences in colocated grids, Z. Angw. Math. Mech., 92, 380–392, 2012. a
Mellado, J. P., Puche, M., and van Heerwaarden, C. C.: Moisture statistics in
free convective boundary layers growing into linearly stratified atmospheres,
Q. J. Roy. Meteorol. Soc., 143, 2403–2419, 2017. a
Mellado, J. P., Ansorge, C., de Lózar, A., Müßle, L., and van Heerwaarden, C.: TLab Documentation, available at:
https://github.com/turbulencia/tlab, last access: 13 January 2021. a
Molemaker, M. J. and Vilà-Guerau de Arellano, J.: Control of chemical
reactions by convective turbulence in the boundary layer, J. Atmos. Sci., 55, 568–579, 1998. a
Oke, T. R.: Urban Environments, in: The Surface Climates of Canada, edited by: Bailey, W. G., Oke, T. R., and Rouse, W. R., McGill-Queens University Press, Montreal, 303–327, 1997. a
Ouwersloot, H. G., Vilà-Guerau de Arellano, J., van Heerwaarden, C. C., Ganzeveld, L. N., Krol, M. C., and Lelieveld, J.: On the segregation of chemical species in a clear boundary layer over heterogeneous land surfaces, Atmos. Chem. Phys., 11, 10681–10704, https://doi.org/10.5194/acp-11-10681-2011, 2011. a, b, c, d, e, f, g, h, i, j, k
Patton, E. G., Davis, K. J., Barth, M. C., and Sullivan, P. P.: Decaying
scalars emitted by a forest canopy: A numerical study, Bound.-Lay. Meteorol., 100, 91–129, 2001. a
Pope, S. B.: Ten questions concerning the large-eddy simulation of turbulent
flows, New J. Phys., 6, 35, 2004. a
Schumann, U.: Large-eddy simulation of turbulent diffusion with chemical
reactions in the convective boundary layer, Atmos. Environ., 23, 1713–1727, 1989. a
Sullivan, P. P. and Patton, E. G.: The effect of mesh resolution on convective boundary layer statistics and structures generated by large-eddy simulation, J. Atmos. Sci., 68, 2395–2415, 2011. a
Sykes, R., Parker, S., Henn, D., and Lewellen, W.: Turbulent mixing with
chemical reaction in the planetary boundary layer, J. Appl. Meteorol., 33, 825–834, 1994. a
Tennekes, H. and Lumley, J. L.: A first course in turbulence, MIT Press, Cambridge, MA, 1972. a
van Hooft, J. A., Popinet, S., van Heerwaarden, C. C., van der Linden, S. J.,
de Roode, S. R., and van de Wiel, B. J.: Towards adaptive grids for atmospheric boundary-layer simulations, Bound.-Lay. Meteorol., 167, 421–443, 2018. a
Verver, G., Van Dop, H., and Holtslag, A.: Turbulent mixing of reactive gases
in the convective boundary layer, Bound.-Lay. Meteorol., 85, 197–222, 1997. a
Vilà-Guerau de Arellano, J.: Bridging the gap between atmospheric physics
and chemistry in studies of small-scale turbulence, B. Am. Meteorol. Soc., 84, 51–56, 2003. a
Vilà-Guerau de Arellano, J., Kim, S.-W., Barth, M. C., and Patton, E. G.: Transport and chemical transformations influenced by shallow cumulus over land, Atmos. Chem. Phys., 5, 3219–3231, https://doi.org/10.5194/acp-5-3219-2005, 2005. a
Vinuesa, J.-F. and Porté-Agel, F.: A dynamic similarity subgrid model for
chemical transformations in large-eddy simulation of the atmospheric boundary
layer, Geophys. Res. Lett., 32, L03814, https://doi.org/10.1029/2004GL021349, 2005. a
Vinuesa, J.-F. and Port́e-Agel, F.: Dynamic models for the subgrid-scale
mixing of reactants in atmospheric turbulent reacting flows, J. Atmos. Sci., 65, 1692–1699, 2008. a
Waggy, S. B., Biringen, S., and Sullivan, P. P.: Direct numerical simulation of top-down and bottom-up diffusion in the convective boundary layer, J. Fluid Mech., 724, 581–606, 2013. a
Wyngaard, J. C. and Brost, R. A.: Top-down and bottom-up diffusion of a scalar in the convective boundary layer, J. Atmos. Sci., 41, 102–112, 1984. a
Zumdahl, S. S.: Chemical principles, D. C. Heath, Lexington, MA, 1992. a
Zyryanov, D., Foret, G., Eremenko, M., Beekmann, M., Cammas, J.-P., D'Isidoro, M., Elbern, H., Flemming, J., Friese, E., Kioutsioutkis, I., Maurizi, A., Melas, D., Meleux, F., Menut, L., Moinat, P., Peuch, V.-H., Poupkou, A., Razinger, M., Schultz, M., Stein, O., Suttie, A. M., Valdebenito, A., Zerefos, C., Dufour, G., Bergametti, G., and Flaud, J.-M.: 3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model, Atmos. Chem. Phys., 12, 3219–3240, https://doi.org/10.5194/acp-12-3219-2012, 2012. a
Short summary
Intense and localised emissions of pollutants are common in urban environments, in which turbulence cannot mix these segregated pollutants efficiently in the atmosphere. Despite their relatively high resolution, regional models cannot resolve such segregation and assume instantaneous mixing of these pollutants in their model grids, which potentially induces significant error in the subsequent chemical calculation, based on our calculation with a model that explicitly resolves turbulent motions.
Intense and localised emissions of pollutants are common in urban environments, in which...
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