The primary observing systems contributing to the GCOS are the WMO Integrated Global Observing System (WIGOS),<ref>{{cite news |title= WMO Integrated Global Observing System |publisher=WMO |year= 2013 |url= http://www.wmo.int/pages/prog/www/wigos/index_en.html|accessdate= 2013-11-05}}</ref> the Global Cryosphere Watch (GCW),<ref>{{cite news |title= Global Cryosphere Watch |publisher=WMO |year= 2013 |url= http://globalcryospherewatch.org/|accessdate= 2013-11-05}}</ref> and the World Hydrological Cycle Observing System (WHYCOS),<ref>{{cite news |title= World Hydrological Cycle Observing System |publisher=WMO |year= 2013 |url= http://www.whycos.org/whycos/|accessdate= 2013-11-05}}</ref> and the [[Intergovernmental Oceanographic Commission]]-led Global Ocean Observing System ([[GOOS]]). A number of other domain-based and cross-domain research and operational observing systems also provide important contributions and encompass both in-situ and satellite observations. GCOS is both supported by and supports the international scientific and technical community, and the [[World Climate Research Programme]] (WCRP) co-sponsors the expert panels set up by GCOS for the atmospheric, oceanic and terrestrial domains. The composite observing system designated by GCOS serves as the climate-observation component of the broader [[Global Earth Observation System of Systems]] (GEOSS), and at the same time a number of specific observing-system initiatives of GEOSS contribute to the GCOS. | The primary observing systems contributing to the GCOS are the WMO Integrated Global Observing System (WIGOS),<ref>{{cite news |title= WMO Integrated Global Observing System |publisher=WMO |year= 2013 |url= http://www.wmo.int/pages/prog/www/wigos/index_en.html|accessdate= 2013-11-05}}</ref> the Global Cryosphere Watch (GCW),<ref>{{cite news |title= Global Cryosphere Watch |publisher=WMO |year= 2013 |url= http://globalcryospherewatch.org/|accessdate= 2013-11-05}}</ref> and the World Hydrological Cycle Observing System (WHYCOS),<ref>{{cite news |title= World Hydrological Cycle Observing System |publisher=WMO |year= 2013 |url= http://www.whycos.org/whycos/|accessdate= 2013-11-05}}</ref> and the [[Intergovernmental Oceanographic Commission]]-led Global Ocean Observing System ([[GOOS]]). A number of other domain-based and cross-domain research and operational observing systems also provide important contributions and encompass both in-situ and satellite observations. GCOS is both supported by and supports the international scientific and technical community, and the [[World Climate Research Programme]] (WCRP) co-sponsors the expert panels set up by GCOS for the atmospheric, oceanic and terrestrial domains. The composite observing system designated by GCOS serves as the climate-observation component of the broader [[Global Earth Observation System of Systems]] (GEOSS), and at the same time a number of specific observing-system initiatives of GEOSS contribute to the GCOS. |