Recent Accessments

Joint IPWG-GDAP Precipitation Assessment – June 2021

This comprehensive report reviews the current state of precipitation products, and includes assessments of sub-daily global satellite precipitation products, discussions of various climate applications of precipitation products, and deliberations on emerging directions and the future of precipitation products.

Chairs: Rémy Roca and Ziad Haddad

Precipitation Assessment Report – May 2008

Evaluating the reliability of available, global, long-term precipitation data products in depicting the variations of precipitation at larger-than-weather scales with a special emphasis on the GPCP product.

Chairs: Arnold Gruber and Vincenzo Levizzani

Cloud Assessment Report – Nov. 2012

Assessing the reliability of global, long-term cloud data sets. See also the Cloud Assessment website.

Chairs: Claudia Stubenrauch 
(2006 – Present) and 

Stefan Kinne 
(2008 – Present)

Radiative Flux Assessment – Dec. 2012

Providing a forum for consistent analysis of long-term radiative flux products, primarily top-of-atmosphere and surface fluxes, to establish a foundation for better global radiation budget analysis.

Chair: Paul Stackhouse
 (2004 – Present)

Ongoing Assessments

Aerosol Assessment

Assessing the quality and compatibility of global aerosol products with a focus on the Global Aerosol Climatology Project (GACP).

Chairs: Sundar Christopher
 (2008 – Present) and 

Jeffrey Reid
 (2008 – Present)

Water Vapor Assessment

Quantifying the state of the art in water vapor products being constructed for climate applications.

International GEWEX Project Office
111 Research Hall, Mail Stop 6C5
4400 University Drive
Fairfax, VA 22030 USA

  • This field is for validation purposes and should be left unchanged.