Atmosphere Watch (GAW) programme of WMO is a partnership involving 80
countries, 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 GHGs, ozone,
UV, aerosols, selected reactive gases, and
GAW is considered the atmospheric chemistry component of the Global Climate Observing System (GCOS).
The GAW programme supports global networks that deliver observations which are then used to address gaps in
understanding of climate, weather and air pollution issues and to deliver services and products
required by WMO Members in fulfilling their national mandate. The GAW
monitoring system focuses on six classes of variables (i.e. ozone, UV radiation, greenhouse gases,
aerosols, selected reactive gases and precipitation chemistry). For these variables, GAW acts as a
“steward of global coordination” supporting all components needed for a rational observing system.
Each of the six variable groups has a SAG and GAW Central Facilities responsible for scientific
guidance and technical details of the global network. An additional SAG exists for the GAW
Urban Research and Meteorology Experiment (GURME).
Organizational components and structure of the Programme are presented under "Structure".