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  1. Home
  2. Essential Climate Variables
  3. Precursors for Aerosols and Ozone
  4. ECV Products and Requirements for Precursors for Aerosols and Ozone

ECV Products and Requirements for Precursors for Aerosols and Ozone

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 FREQ. RES. REQUIRED MEASUREMENT UNCERTAINTY STABILITY STANDARDS/ REFERENCES
NO2 tropospheric column Molecules of NO2 in the atmosphere from surface to tropopause (Molecules/cm2) 4hr 5-10 km/NA Max (20%,0.03DU) 2%  
SO2,HCHO tropospheric columns Total molecules of SO2, HCHO in the atmosphere from surface to tropopause (Molecules/cm2) 4hr 5-10 km/NA Max (30%,0.04DU) 5%  
CO tropospheric column Total molecules of CO in the atmosphere from surface to tropopause (Molecules/cm2) 4hr 5-10 km/NA Max (20%,20DU); 2%  
CO tropospheric profile Dry air mole fraction of CO (Mol/mol) 4hr 10 km/5km 20%; 2%  

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