International Workshop on the Asian Monsoon Organized by ICIMOD

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The international workshop on Atmospheric Composition and the Asian Summer Monsoon (ACAM), held on 9-12 June 2013 in Kathmandu, Nepal, brought together 120 scientists from 17 countries to discuss the current state of scientific knowledge about interactions between air pollution and the Asian Summer Monsoon. It was co-hosted by ICIMOD, the US National Science Foundation (NSF) and National Centre for Atmospheric Research (NCAR), the International Geosphere-Biosphere Programmme (IGBP)’s International Global Atmospheric Chemistry Project (IGAC) and Integrated Land Ecosystem-Atmosphere Processes Study (iLEAPS),  as well as the World Climate Research Programme (WCRP)’s Stratosphere-Troposphere Processes and their Role in Climate Project (SPARC). Conceived on the sidelines of the 2012 International Global Atmospheric Chemistry (IGAC) meeting and managed by a 12-member international steering committee including ICIMOD’s Lead Atmospheric Scientist, Dr Arnico Panday, ACAM was designed to bring together and foster collaboration among atmospheric scientists doing research in Asia on topics of growing concern, including: 

  • That the changing atmospheric composition in Asia, especially increases in aerosol pollutants, through effects on atmospheric heating and cooling as well as through microphysical processes inside clouds, affects the location, timing, and amounts of monsoon rainfall; and 
  • That tall convective monsoon clouds transport growing amounts of air pollution emitted at the surface into the lower stratosphere where they have an impact on global climate. 
Oral presentations and posters were selected on the basis of abstracts submitted in March. They covered topics ranging from emissions and air quality, to the ways in which aerosols affect clouds and rainfall, to convective cloud processes that transport pollutants into the upper atmosphere, to impacts on the stratosphere and global climate. A summary session focused on community building and follow-up activities.