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1. Off-line algorithm for calculation of vertical tracer transport in the troposphere due to deep convection

Author

Philip Cameron-Smith, Philippe Bousquet, Maarten Krol, Zoe Loh, Lei Meng, Emanuel Gloor, Ronald G. Prinn, R. Saito, Dan Bergmann, Martyn P. Chipperfield, Prabir K. Patra, Huisheng Bian, Audrey Fortems-Cheiney, Matthew Rigby, Annemarie Fraser, Dmitry Belikov, Chris Wilson, Sander Houweling, Rachel M. Law, Peter Hess, Anna Agusti-Panareda, Stephan R. Kawa, Paul I. Palmer, Katherine D. Haynes, Shamil Maksyutov, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Earth and Climate, Massachusetts Institute of Technology. Center for Global Change Science, and Prinn, Ronald G.

Subjects
Convection, Meteorologie en Luchtkwaliteit, Atmospheric Science, PARAMETERIZATION, Meteorology, Chemical transport model, 010504 meteorology & atmospheric sciences, Meteorology and Air Quality, CLOUD ENSEMBLE, atmospheric transport, meteorological data, general-circulation model, 010501 environmental sciences, precipitation, Atmospheric sciences, 01 natural sciences, observed radon profiles, CUMULUS CONVECTION, 010305 fluids & plasmas, RN-222, Troposphere, lcsh:Chemistry, TRACER, 0103 physical sciences, ATMOSPHERIC TRANSPORT, Precipitation, GENERAL-CIRCULATION MODEL, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Moisture, CLIMATE SIMULATIONS, cumulus convection, rn-222, Entrainment (meteorology), climate simulations, METEOROLOGICAL DATA, parameterization, Free convective layer, lcsh:QC1-999, cloud ensemble, OBSERVED RADON PROFILES, lcsh:QD1-999, PRECIPITATION, Environmental science, lcsh:Physics
Abstract

A modified cumulus convection parametrisation scheme is presented. This scheme computes the mass of air transported upward in a cumulus cell using conservation of moisture and a detailed distribution of convective precipitation provided by a reanalysis dataset. The representation of vertical transport within the scheme includes entrainment and detrainment processes in convective updrafts and downdrafts. Output from the proposed parametrisation scheme is employed in the National Institute for Environmental Studies (NIES) global chemical transport model driven by JRA-25/JCDAS reanalysis. The simulated convective precipitation rate and mass fluxes are compared with observations and reanalysis data. A simulation of the short-lived tracer 222Rn is used to further evaluate the performance of the cumulus convection scheme. Simulated distributions of 222Rn are evaluated against observations at the surface and in the free troposphere, and compared with output from models that participated in the TransCom-CH4 Transport Model Intercomparison. From this comparison, we demonstrate that the proposed convective scheme in general is consistent with observed and modeled results.

Published
2013
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2. Off-line algorithm for calculation of vertical tracer transport in the troposphere due to deep convection

Author

Belikov, D.A., Maksyutov, S., Krol, M.C., Fraser, A., Rigby, M., Bian, H., Agusti-Panareda, A., Bergmann, D., Bousquet, P., Cameron-Smith, P., Chipperfield, M.P., Fortems-Cheiney, A., Gloor, E., Haynes, K., Hess, P., Houweling, S., Kawa, S.R., Law, R.M., Loh, Z., Meng, L., Palmer, P.I., Patra, P.K., Prinn, R.G., Saito, R., Wilson, C., Belikov, D.A., Maksyutov, S., Krol, M.C., Fraser, A., Rigby, M., Bian, H., Agusti-Panareda, A., Bergmann, D., Bousquet, P., Cameron-Smith, P., Chipperfield, M.P., Fortems-Cheiney, A., Gloor, E., Haynes, K., Hess, P., Houweling, S., Kawa, S.R., Law, R.M., Loh, Z., Meng, L., Palmer, P.I., Patra, P.K., Prinn, R.G., Saito, R., and Wilson, C.

Abstract

A modified cumulus convection parametrisation scheme is presented. This scheme computes the mass of air transported upward in a cumulus cell using conservation of moisture and a detailed distribution of convective precipitation provided by a reanalysis dataset. The representation of vertical transport within the scheme includes entrainment and detrainment processes in convective updrafts and downdrafts. Output from the proposed parametrisation scheme is employed in the National Institute for Environmental Studies (NIES) global chemical transport model driven by JRA-25/JCDAS reanalysis. The simulated convective precipitation rate and mass fluxes are compared with observations and reanalysis data. A simulation of the short-lived tracer Rn-222 is used to further evaluate the performance of the cumulus convection scheme. Simulated distributions of Rn-222 are evaluated against observations at the surface and in the free troposphere, and compared with output from models that participated in the TransCom-CH4 Transport Model Intercomparison. From this comparison, we demonstrate that the proposed convective scheme in general is consistent with observed and modeled results.

Published
2013

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