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17 March 2015: The following research article has been published under the SI2N initiatiave: Intercomparison of vertically resolved merged satellite ozone data sets: interannual variability and long-term trends. Click here to read the article, published in ACP.
  • 10 March 2015: the 5th Asia-Pacific GAW Newsletter on Greenhouse Gaseshas been published (see section "Other" publications)
  • 17 February 2015: IGAC/DEBITS AFRICA project joined GAW asa contributing network
  • 14 November 2014: IMPORTANT NOTE: SF6 scale has been updated (announcement)
     For more news please go to NEWS-ARCHIVE  


The Global Atmosphere Watch (GAW) programme of WMO is a partnership involving the Members of WMO, contributing networks and collaborating organizations and bodies which provides reliable scientific data and information on the chemical composition of the atmosphere, its natural and anthropogenic change, and helps to improve the understanding of interactions between the atmosphere, the oceans and the biosphere.

GAW focal areas are aerosols, greenhouse gases, selected reactive gases, ozone, UV radiation and precipitation chemistry (or atmospheric deposition). GAW supports the WMO GAW Urban Research Meteorology and Environment (GURME) project and works together the Group of Experts on Scientific Aspects of Marine Environmental Protection (GESAMP) as well as provides Sand and Dust Storms Warning (SDS-WAS).

Greenhouse gases
Reactive gases
UV radiation
Acid deposition
Sand and Dust Storms

GAW is considered the atmospheric chemistry component of the Global Climate Observing System (GCOS).

Organizational components and structure of the Programme are presented under "Structure".

The GAW Programme operates according to WMO Global Atmosphere Watch (GAW) Strategic Pan: 2008-2015 and its Addendum.

Meetings & Training

Upcoming meetings (2015)
Materials of previous meetings
 GAW and related meeting lists (2009, 2010, 2011, 2012, 2013, 2014)

Draft GAW reports (open for comments):

GAW 216 - Seventh Intercomparison Campaign of the Regional Brewer Calibration Center Europe (RBCC-E), Lichtklimatisches Observatorium, Arosa, Switzerland, 16-27 July 2012







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