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  2. Essential Climate Variables
  3. Carbon Dioxide, Methane & Other Greenhouse Gases
  4. ECV Products and Requirements for Carbon Dioxide, Methane & Other Greenhouse Gases

ECV Products and Requirements for Carbon Dioxide, Methane & Other Greenhouse Gases

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
Tropospheric CO2 column Molecules of CO2 in the atmosphere from surface to Tropopause (Molecules/cm2) 4hr 5-10km/NA 1ppm 1.5ppm/ decade ESA CCI CMUG tables (http://www.esa-cmug-cci.org/)
Tropospheric CO2 Dry air mole fraction of CO2 in the troposphere (Mol/mol) 4hr 5-10km/5km 1ppm 1.5ppm  
Tropospheric CH4 column Total molecules of CH4 in the atmosphere from surface to Tropopause (Molecules/cm2) 4hr 5-10km/NA 10ppb 7ppb  
Tropospheric CH4 Dry air mole fraction of CH4 in the troposphere (Mol/mol) 4hr 5-10km/5km 0.5ppb 0.7ppb  
Stratospheric CH4 Dry air mole fraction of CH4 in the stratosphere (Mol/mol) daily 100-200km/2km 5% 0.30%  

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