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  2. Essential Climate Variables
  3. Aerosols
  4. ECV Products and Requirements for Aerosols

ECV Products and Requirements for Aerosols

These products and requirements reflect the Implementation Plan 2016 (GCOS-200). GCOS is reviewing and will update the requirements as part of their contribution to the UNFCCC Global Stocktake and the current state of the discussion is reflected on the web page "2022 requirement update".

 

Product Definition Frequency Resolution Required Measurement Uncertainty Stability Standards/ References
Aerosol optical depth The AOD is the spectral dependant aerosol e extinction coefficient integrated over the geometrical path length (dimensionless) 4hr 5-10km/ NA/ Max(0.03;10%) 0.02/ decade ESA CCI CMUG tables (http://www.esa-cmug-cci.org/)
Aerosol-layer height Height of vertically localized aerosol layer in the free troposphere above sea level (km) 4hr 5-10km/ NA/ 0.03 0.01  
Single-scattering albedo The spectrally dependent ratio of the aerosol scattering to the aerosol extinction (dimensionless) 4hr 5-10km/ NA/ 1km 0.5km  
Aerosol-extinction coeff. profile Spectrally dependent scattering and absorption by a population of aerosol particles per unit of geometrical path length (1/m) weekly 200-500 km/ 1km 10% 20%  

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