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Global-GCOS Upper Air Network (GUAN)
browse graphic The Global Climate Observing System (GCOS) was established in 1992 to ensure that the observations and information needed to address climate-related issues are taken and made available to all potential users. It is co-sponsored by the World Meteorological Organization (WMO), the Intergovernmental Oceanographic Commission (IOC) of UNESCO, the United Nations Environment Programme (UNEP) and the International Council for Science (ICSU). GCOS does not directly make observations nor generate data products. Rather, its role is to stimulate, encourage, coordinate or otherwise facilitate making necessary observations by national or international organizations in support of their own requirements and other shared goals. GCOS provides an operational framework for integrating, and enhancing as needed, the observational systems of participating countries and organizations into a comprehensive system focused on requirements for climate studies. To do this, GCOS builds upon existing and developing observing systems such as the Global Ocean Observing System, the Global Terrestrial Observing System, and the Global Observing System and Global Atmospheric Watch of the World Meteorological Organization. The GCOS Upper air Network, or GUAN, is one of the GCOS atmospheric networks.