Increasingly, the chemistry and dynamics of the stratosphere and troposphere are being studied and modeled as a single entity in global models. As evidence, in support of the Intergovernmental Panel on Climate Change Fifth Assessment Report (IPCC AR5), several groups performed simulations in the Coupled Model Intercomparison Project Phase 5 (CMIP5) using global models with interactive chemistry spanning the surface through the stratosphere and above.

ACAM is an emerging IGAC activity that will be developed more fully over the next two years. Scientifically, the initiative focuses on four themes, each representing a key aspect of the connection between atmospheric composition and Asian monsoon dynamics:

  1. Emissions and air quality;
  2. Aerosols and clouds;
  3. Convection and chemistry;
  4. UTLS Response to the Asian Monsoon

Organizationally, the initiative invites the participation around four types of activities:

Fine particulate matter (PM2.5) is a leading risk factor for premature mortality. Additional attention is needed to improve global estimates of PM2.5 exposure.

Wet and dry deposition of chemical species to the earth’s surface plays an essential role in controlling the concentration of gases and aerosols in the troposphere. The chemical composition of atmospheric deposition provides important information on many interacting physical and chemical mechanisms in the atmosphere such as emission sources, atmospheric dynamics and transport, atmospheric removal processes, and nutrient cycling in ecosystems.

Although Monsoon Asia is one of the current “frontiers” for atmospheric chemistry, the region is not well connected to the international science community. Corresponding to emerging environmental issues including severe air pollution, the atmospheric chemistry community in Monsoon Asia is rapidly growing at both national and international levels, and policymakers need scientific evidence and support. However, there is large asymmetry between countries.

Together with the international launch of the IGAC project, the atmospheric chemistry community in Japan was first organized in 1989. Since then, Japanese scientists have been continuously playing an important role in the development of atmospheric chemistry research, in particular, in Asia, and in the implementation of the agenda of IGAC.

Under the Science Council of Japan (SCJ), the IGAC-Japan National Committee is overseeing IGAC-related activities in Japan, with specific goals to:

Under the guiding principle of providing equal opportunity for all scientists in the Americas, the IGAC Americas Working Group aims to build a cohesive network and foster the next generation of atmospheric scientists with the ultimate goal of contributing to development of a scientific community focused on building collective knowledge in/for the Americas. There is a priority on bringing together scientists from across the entirety of the Americas. To this end, the Americas Working Group seeks to:

The sheer magnitude of China's landmass coupled with its growing and economically advancing population makes it critical to understand its role in air quality and climate on both regional and global scales. Chinese atmospheric chemists have been conducting frontier research for forty years in areas such as urban and regional air pollution and the climate effects and health impacts of air pollution. IGAC intends to more fully integrate Chinese research experience by establishing its first national working group in China. The goals of the IGAC China Working Group are to:

Prof. Dr. Noureddine Yassaa is the Director of "Centre de Développement des Energies Renouvelables" in Algeria. He is also a Professor of Chemistry at the University of Science and Technology Houari Boumediene (USTHB) in Algiers, Algeria and leading a research group in Environmental Science. He received his doctorate in Chemistry in 2001 from the University USTHB. He conducted some of his doctoral research at the Institute for Atmospheric Pollution, National Research Council (IIA-CNR) in Rome, Italy.

Tao Wang is a professor at the Department of Civil and Environmental Engineering of the Hong Kong Polytechnic University (PolyU). He received his PhD in Atmospheric Chemistry at Georgia Institute of Technology in 1992 and then conducted postdoctoral research at University of Michigan-Ann Arbor. His earlier work was field investigation of reactive nitrogen and ground-level ozone, in association with the SOS, NARE, and PEM-West programs.