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Transport of Aerosol Pollution in the Utls During Asian Summer Monsoon as Simulated by Echam5-hammoz Model : Volume 12, Issue 11 (21/11/2012)

By Fadnavis, S.

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Book Id: WPLBN0003987843
Format Type: PDF Article :
File Size: Pages 37
Reproduction Date: 2015

Title: Transport of Aerosol Pollution in the Utls During Asian Summer Monsoon as Simulated by Echam5-hammoz Model : Volume 12, Issue 11 (21/11/2012)  
Author: Fadnavis, S.
Volume: Vol. 12, Issue 11
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Semeniuk, K., Das, S., Schultz, M. G., Pozzoli, L., Fadnavis, S., & Ghude, S. D. (2012). Transport of Aerosol Pollution in the Utls During Asian Summer Monsoon as Simulated by Echam5-hammoz Model : Volume 12, Issue 11 (21/11/2012). Retrieved from

Description: Indian Institute of Tropical Meteorology, Pune, India. An eight member ensemble of ECHAM5-HAMMOZ simulations for the year 2003 is analyzed to study the transport of aerosols in the Upper Troposphere and Lower Stratosphere (UTLS) during the Asian Summer Monsoon (ASM). Simulations show persistent maxima in black carbon, organic carbon, sulfate, and mineral dust aerosols within the anticyclone in the UTLS throughout the ASM (period from July to September) when convective activity over the Indian subcontinent is highest. Model simulations indicate boundary layer aerosol pollution as the source of this UTLS aerosol layer and identify ASM convection as the dominant transport process. Evidence of ASM transport of aerosols into the stratosphere is observed in HALogen Occultation Experiment (HALOE) and Stratospheric Aerosol and Gas Experiment (SAGE) II aerosol extinction. The impact of aerosols in the UTLS region is analyzed by evaluating the differences between simulations with (CTRL) and without aerosol (HAM-off) loading. The transport of anthropogenic aerosols in the UTLS increases cloud ice, water vapour and temperature, indicating that aerosols play an important role in enhancement of cloud ice in the Upper-Troposphere (UT). Aerosol induced circulation changes include a weakening of the main branch of the Hadley circulation and increased vertical transport around the southern flank of the Himalayas and reduction in monsoon precipitation over the India region.

Transport of aerosol pollution in the UTLS during Asian summer monsoon as simulated by ECHAM5-HAMMOZ model

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