Atmospheric Composition and the Asian Monsoon (ACAM)

SPARC/IGAC joint activity

Activity leaders

Laura Pan (co-Lead)
National Center for Atmospheric Research, USA

Jim Crawford (co-Lead)
NASA Langley Research Center, USA

Scientific Steering Group Members

Michelle Santee (SPARC Liaison)
Jet Propulsion Laboratory, USA

Hiroshi Tanimoto (IGAC-Asia Liaison)
National Institute for Environmental Studies, Japan

Arnico Panday (1st workshop LOC, ICIMOD Liaison)

Sachiko Hayashida (2nd workshop LOC)
Nara Women’s University, Japan

Vinayak Sinha (WG1 co-Lead)
IISER, India

Gabi Stiller (WG1 co-Lead)
Karlsruher Institute for Technology, IMK, Germany

Jessica Neu (WG2 co-Lead)
Jet Propulsion Laboratory, USA

Chiara Cagnazzo (WG2 co-Lead)

Mian Chin (WG2 co-Lead)
NASA Goddard Space Flight Center, USA

Hans Schlager (WG3 co-Lead)
DLR, Germany

Jianchun Bian (WG3 co-Lead)
IAP/CAS, China

Mary Barth (WG4 co-Lead)
National Center for Atmospheric Research, USA

Ritesh Gautam (WG4 co-Lead)
Indian Institute of Technology (Bombay), India

Federico Fierli (WG4 co-Lead)
Institute for Atmospheric Sciences and Climate, National Research Council, Italy

Activity description

ACAM is a joint SPARC/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 in the Asian monsoon region;
  2. Aerosols, clouds, and their interactions with the Asian monsoon;
  3. Impact of monsoon convection on chemistry;
  4. UTLS Response to the Asian Monsoon.

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

  1. Organising data sharing for ACAM-relevant measurements;
  2. Forming a partnership with the CCMI activity to facilitate two-way interaction;
  3. Field campaign concept development;
  4. Sponsorship of training schools on model use for ACAM regional young scientists

As a weather pattern, the Asian monsoon impacts the lives of more than a billion people. With rapid population and economic growth across the monsoon region, it becomes a pressing concern that the monsoon convection coupled to surface emissions is playing a significant role in the region’s air quality. The uplift of pollutants also enhances aerosol–cloud interactions that may change the behavior of the monsoon. The chemical transport effect of the monsoon system is seen from satellites as an effective transport path for pollutants to enter the stratosphere. The monsoon system is therefore relevant to scales and processes bridging regional air quality, climate change, and global chemistry-climate interaction. Accurate representation of this system in global chemistry-climate models is critical to predicting how this evolving region may contribute to future change. To characterize and quantify the impact of the system, integrated study is essential, including observations (in situ and remote sensing) from the surface through the troposphere and stratosphere as well as modeling from regional to global scales. To be successful in this pursuit, it is necessary to build strong international collaborations to obtain the diverse expertise, resources, and access to the monsoon region for international research teams. The ACAM activity represents a critical step in building these international relationships.

  • 2nd ACAM workshop, 8-10 June 2015, Bangkok, Thailand.
  • 1st ACAM training school, 11-12 June, 2015, Bangkok, Thailand
  • Special session on Atmospheric Composition and the Asian Summer Monsoon (ACAM)
    at AOGS2014 (Asian Oceanic and Geosciences Society), 28 July-1 August 2014, Sapporo, Japan.
  • IGAC Science Conference side meeting and poster.

Published results

Journal publications:

Randel, W. J., Laura, L., and J. Bian, 2016: Workshop on dynamics, transport and chemistry of the UTLS Asian Monsoon. Advances in Atmospheric Sciences, 33(9), pp 1096–1098.

SPARC activity updates:

SPARC Newsletter No. 46, 2016, p. 20: Report on the 2nd Workshop on Atmospheric Composition and the Asian Monsoon (ACAM), by L. Pan and J. Crawford.

SPARC Newsletter No. 42, 2014, p. 40: Report on the Atmospheric Composition and the summer Asian Monsoon (ACAM) Workshop, 9-12 June 2013, Kathmandu, Nepal, by L. Pan, J. Crawford, H. Tanimoto, M. Lawrence, A. Panday, S. Suresh Babu, B. Barret, H. Schlager, P. Konopka, and J. Bian.

Website for further information