Evaluation of a chemical transport model for sulfate using ACE-2 observations and attribution of sulfate mixing ratios to source regions and formation processes

Details Evaluation of a chemical transport model for sulfate using ACE-2 observations and attribution of sulfate mixing ratios to source regions and formation processes Evaluation of a chemical transport model for sulfate using ACE-2 observations and attribution of sulfate mixing ratios to source regions and formation processes

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30l..43b&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 12, pp. 43-1, CiteID 1641, DOI 10.1029/2003GL016942

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Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry (3334), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry

Scientific paper

High resolution measurements of sulfate during the ACE-2 campaign (June-July 1997) permit detailed evaluation of the performance of a chemical transport models driven by analyzed meteorological data. At Tenerife, Canary Islands, (minimal proximate sources) the median ratio characteristic spread between model and observations, S m/o ~1.3, was comparable to the spread of three sets of collocated observations and to the spread of observations at stations separated by ~13 km within a single model grid cell (1° × 1°). Somewhat greater S m/o, ~1.6, at Sagres, Portugal is attributed to nonrepresentativeness of a single measurement site influenced by proximate sources. At Tenerife contributions from European, North American, and biogenic sources to sulfate mixing ratios are comparable, with North American sources dominating (up to ~85%) under conditions of a strong Azores high; thus substantial contributions of sulfate, and by implication other aerosols, can result from long-range midlatitude transport across the Atlantic Ocean.

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