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  3. Lakes
  4. ECV Products and Requirements for Lakes

ECV Products and Requirements for Lakes

These products and requirements reflect the Implementation Plan 2016 (GCOS-200). GCOS is reviewing and will update the requirements until 2022. More information on: gcos.wmo.int.

 

PRODUCT DEFINITION FREQUENCY RESOLUTION REQUIRED MEASUREMENT UNCERTAINTY STABILITY STANDARDS/ REFERENCES
Lake water level Elevation of the free surface of a lake relative to a specified vertical datum Daily. 100 m 3 cm for large lakes; 10 cm for the remainder 1 cm/decade WMO (2006, 2008a)
Water Extent Aera extent of the surface of a lake Daily 20 m 10 % (relative); 5% (for 70 largest lakes) 5%/%/decade WMO (2006, 2008a)
Lake surface water temperature Temperature of the lake surface [ K ]. Weekly 300 m 1 K 0.1 K/decade WMO (2006, 2008a)
Lake ice thickness Thickness of ice of a lake Monthly 100m 1-2 cm    
Lake Ice Cover Percentage of lake covered by ice Daily 300 m 10% 1 % /decade  
Lake Colour Lake Water Leaving Reflectance Weekly 300 m 30% 1 %/decade  

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