Jungfraujoch, at 3,580 m in the Swiss Alps, is the highest elevation WMO GAW station in Europe.

Schneefernerhaus: The Schneefernerhaus on the flanks of Zugspitze Mountain is the highest GAW observatory in Germany, providing baseline measurements of climate and short-lived

gases for the Northern Alps region.

Minamitorishima, an isolated Pacific Island, is location of one of the Japanese WMO GAW sites.

York Laboratories: Quality assurance of observations is an important aspect of the the GAW Program. To reach network compatibility GAW assigned individual laboratories around the

World to prepare and keep traceable records of primary standard for individual species. T he stations within the network ensure their traceability to these primary standards. The photo

shows one of the shelves with calibration gases at the University of York.

The Atmospheric Research Observatory: The GAW Atmospheric Research Observatory at South Pole is one of the flagships of contributing US NOAA/NSF stations.

SAUNA Campaign: Celebration of successful intercomparison measurements, during the SAUNA (Sodankylä Total Ozone Intercomparison and Validation) Campaign in Socankyla, Finland, at -26C

in March 2006.

High Mountain Station: A high mountain station in the Himalayas, the GAW Pyramid station in Nepal.

NOAA Barrow Atmospheric Observatory: The GAW NOAA Barrow Atmospheric Observatory, located in the Arctic Tundra and close proximity to the Beaufort Sea.

GA Training and Education Centre GAWTEC: Capacity development is an important component of the GAW Program. The GAW Training and Education Centre GAWTEC is organized by the

German Environmental Agency and located at the Schneefernerhaus. GAWTEC provides scientific guidance and instructions to GAW station personnel. Courses are organized twice a year and cover measurement techniques, the theoretical background of atmospheric physics

and chemistry, and data handling and interpretation.

GAW Quality Assurance: Instrument intercomparisons play an important role in the GAW Quality Assurance program. These comparisons are organized in different regions and under

different environmental conditions. Dobson comparison campaign in Egypt is shown in this year 2004 photo.

Bondville Site: Precipitation chemistry analysis is one of the focal areas in GAW. This picture shows a monitoring site in Bondville, Illinois, United States, operated by the US National

Atmospheric Deposition Program since 1979.

The Pico Mountain observatory, in the Azores Islands, Portugal, after a light April snow fall. INSTAARs Atmospheric Research Laboratory is in its sixth year of atmopheric transport and

chemistry research with air monitoring at this remote island in the North Atlantic off the coast of Portugal. March 2009. Photo: Jacques Hueber (INSTAAR).

Summit Station: The GAW Summit Station, in the center off and on top of the Greenland Ice shield is the only high elevation observing site in the Arctic, providing year-round data on the

composition of the polar background atmosphere.

Exchange of passive samplers for collection of nitrogen oxides (NOx) and sulfur dioxide (SO2) at Bukit Kototabang, Indonesia, in January 2007.

GA Training and Education Centre GAWTEC: Capacity development is an important component of the GAW Program. The GAW Training and Education Centre GAWTEC is organized by the

German Environmental Agency and located at the Schneefernerhaus. GAWTEC provides scientific guidance and instructions to GAW station personnel. Courses are organized twice a year and cover measurement techniques, the theoretical background of atmospheric physics

and chemistry, and data handling and interpretation.

GA Training and Education Centre GAWTEC: Capacity development is an important component of the GAW Program. The GAW Training and Education Centre GAWTEC is organized by the

German Environmental Agency and located at the Schneefernerhaus. GAWTEC provides scientific guidance and instructions to GAW station personnel. Courses are organized twice a year and cover measurement techniques, the theoretical background of atmospheric physics

and chemistry, and data handling and interpretation.