Global Network of Isotopes in Precipitation (GNIP)

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Founded 1961, as a joint programme of B-XB1383 - International Atomic Energy Agency (IAEA) and B-XB3556 - World Meteorological Organization (WMO). Became operational within Isotope Hydrology Section of IAEA in Dec 1998, when a Memorandum of Understanding was signed between IAEA and WMO. Combined with the 'Isotope Hydrology Information System (ISOHIS)' since early 2001. Integrated into the WISER ('Water Isotope System for Data Analysis, Visualization and Electronic Retrieval') web platform, 2004.


Collect basic meteorological data and isotope contents of precipitation (oxygen-18, deuterium and tritium) on a global scale to obtain basic data on the temporal and spatial variations of environmental isotopes in precipitation; provide basic isotope data for the use of environmental isotopes in hydrological investigations within the scope of water resources inventory, planning and development; provide input data to verify and further improve atmospheric circulation models as well as studies on climate change or ecology.


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Scientific Steering Committee (meets as needed, usually in Vienna, (Austria)).


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Relations with Inter-Governmental Organizations

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Type I Classification

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Subjects *

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UN Sustainable Development Goals **

GOAL 13: Climate Action



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** UN SDGs are linked to the subject classification.

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