Atmospheric Composition Analysis Group » Surface …
Contents: V4.NA.02 is recommended for use over North America V4.CH.02 is recommended for use over China V4.GL.02 is recommended for other regions. Previous, obsolete versions are also available.. North American Regional Estimates (V4.NA.02): We estimate ground-level fine particulate matter (PM 2.5) total and compositional mass concentrations over North America by combining Aerosol Optical ...
