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Facilitating Access to Global Observing Systems Data and Information

 Global Terrestrial Observing Network (GT-NET)
Data Access

Global Terrestrial Observing Network (GT-NET) is a system of observation networks: Glacier (GTN-G), Hydrology (GTN-H), Lake Level/Area (GTN-L), Mountain Network, and Permafrost (GTN-P) and River Discharge (GTN-R). Each represents an organized effort for a particular theme, habitat type or region. The formation of GT-Net has been pursued by the Terrestrial Observation Panel for Climate (TOPC) on behalf of the Global Terrestrial Observing System (GTOS) and the Global Climate Observing System (GCOS). Regional networks are being developed through GTOS regional programs.

Data Access and Information on the terrestrial ECVs are available in the ECV Data Access Matrix.

GTN-NET Program Overview

Updated February 2, 2011

Mountains Network

  • Monitoring for global change research in mountains

Permafrost Network (GTN-P)

  • The Global Terrestrial Network for Permafrost (GTN-P), approved in 1999 and coordinated by the International Permafrost Association (IPA), comprises two international monitoring networks: Thermal State of Permafrost (TSP) and Circumpolar Active Layer Monitoring (CALM).

Glacier Network (GTN-G)

Hydrology Network (GTN-H)

Lake Level/Area Network (GTN-L)

  • The International Data Center on the Hydrology of Lakes and Reservoirs (HYDROLARE) establishes, develops and regularly updates international database on hydrological regime of lakes and reservoirs in order to stimulate the development of the global monitoring system on lakes and reservoirs for rational use, preservation and management of their water resources; to improve the knowledge of lateral fluxes transformation within lakes and reservoirs; to supply data for scientific and educational purposes, modelling, development of different global and regional projects/programmes.

River Discharge (GTN-R)

  • The GTN-R is a recently launched project of the Global Runoff Data Centre (GRDC), aiming at improving access to near real-time river discharge data for selected gauging stations around the world, capturing the majority of the freshwater flux into oceans. GTN-R will draw together the already available heterogeneous information on near-real-time river discharge data provided by individual national hydrological services, and redistribute the data in a harmonized way.