Global Climate Observing System (GCOS) Ensuring the Availability of Global Observations for Climate.
World Meteorological Organization Working together in weather, climate and water Global Framework for Climate Services: Climate Services for All Filipe.
WMO Drought Activities Robert Stefanski Chief, Agricultural Meteorology Division WMO.
The GCOS Reference Upper-Air Network H.Vömel 1, F.J. Immler 1, M.Sommer 1, P. Thorne 2, G. Bodeker 3 and the WG-ARO 4 (1) GRUAN Lead center, Richard-Assmann-Observatorium,
