Citation:

Eder, B. OBJECTIVE METEOROLOGICAL CLASSIFICATION SCHEME DESIGNED TO ELUCIDATE OZONE'S DEPENDENCE ON METEOROLOGY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-93/275 (NTIS PB94122587), 1993.

Description:

This paper utilizes a two-stage clustering approach as part of an objective classification scheme designed to elucidate 03's dependence on meteorology. hen applied to ten years (1981-1990) of meteorological data for Birmingham, Alabama, the classification scheme identified seven statistically distinct meteorological regimes. ecause of the critical impact meteorological conditions have on the formation, transport and deposition of 03, the seven homogeneous meteorological clusters exhibited significantly different concentrations characteristics. he two clusters found to contribute the most to the 03 climatology of the area in terms of normalized contribution (normalized product of cluster frequency and mean concentration) were the Bermuda High (25.56%) and Transitional Anticyclone (24.78%). he Migratory Anticyclone's (12.88%) impact on the 03 climatology is limited because of its relative infrequency when compared to C1 and C5. he small contributions associated with the remaining four clusters are attributable to their meteorological characteristics which act to inhibit 03 formation. lusters 2 and 6, the southwesterly flow (8.39%) and the easterly flow (12.32%), advect moisture-laden maritime air from the Gulf of Mexico and the Atlantic Ocean, respectively, resulting in extensive cloud cover, low solar radiation, and mild temperatures. lusters 4 and 7, the cold and warm frontal passages (7.94 and 8.12%), are also characterized by extensive cloud cover and low solar insolation.

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