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FIELDS
AOT
- Black Carbon
- Dust
- Fine
- Organic Carbon
- Sea Salt
- Sulfate
- Total
Surface

How is Surface PM2.5 Calculated? In MERRA-2 the total surface PM2.5 is the sum of the contribution from dust, organic carbon, black carbon, sea salt, and sulfate. The surface geometrical PM2.5 can be calculated from fields in the tavg1_2d_aer_Nx using the following equation: PM2.5 = DUSMASS25 + OCSMASS+ BCSMASS + SSSMASS25 + SO4SMASS* (132.14/96.06). Sulfate requires a multiplication factor since the species tracer in MERRA-2 is the sulfate ion.

Please note that this equation is not applicable for GEOS FP or GEOS-CF.
Total Column
- Black Carbon
- Dust
- Organic Carbon
- Sulfur Dioxide
- Sulfate
- Sea Salt
- Ozone
REGIONS

ANALYSIS DATE

ANALYSIS TIME

Atmospheric Composition (2D) Maps