GEOS-Chem simulation for AEROCOM Organic Aerosol Inter-comparison

SIMULATED YEAR: 2006

Gabriele Curci – CETEMPS

Nov. 2009

CARBONACEOUS AEROSOL BUDGET IN GEOS-Chem

BC OA*

Emission [Tg/y] 7.6 67.9

SOA Production [Tg/y] - 31.8

Total Production [Tg/y] 7.6 99.7

Dry Deposition [Tg/y] 1.9 17.1

Wet Deposition [Tg/y] 5.6 77.8

Total Loss [Tg/y] 7.6 94.9

Burden [Tg] 0.11 0.91

* OA is Organic Mass. An OM/OC ratio of 2.1 is used in calculations.

GEOS-Chem model version v8-02-02 with online SOA chemistry, GEOS-5 meteorology at 2° latitude x 2.5 ° longitude horizontal resolution and 47 vertical layers (38 in the troposphere).

SURFACE TEMPERATURE [K]

SURFACE PRESSURE [hPa]

SURFACE SPECIFIC HUMIDITY [g/kg]

PRECIPITATION [mm/day]

BLACK CARBON (BC) EMISSIONS [Gg]

PRIMARY ORGANIC AEROSOL (POA) EMISSIONS [Gg]

SECONDARY ORGANIC AEROSOL (SOA) PRODUCTION [Gg]

BC DRY DEPOSITION [Gg]

POA DRY DEPOSITION [Gg]

BC WET DEPOSITION [Gg]

OA WET DEPOSITION [Gg]

BC BURDEN [Gg]

OA BURDEN [Gg]

SOA FRACTION OF OA (Column average)

AEROSOL OPTICAL DEPTH @ 550 nm [unitless]

BC OPTICAL DEPTH @ 550 nm [unitless]

OA OPTICAL DEPTH @ 550 nm [unitless]