A Study on Synoptically Influenced Local Wind Circulation in Complex Terrain and Its Application to Air Quality Modeling
World’s population centers are often located along transportation corridors build upon waterways, and the topography of such locales is characterized by complex terrain. Complex topography has a profound influence on local microclimate as well as on air quality. Phoenix is one of the large and growing cities in the U.S., which has been classified as “serious” by the US Environmental Protection Agency for non-attainment of the National Ambient Air Quality Standards for ozone, fine particulate matter (PM) and CO. One of the major factors contributing to this phenomenon is the complex-terrain induced thermal circulation. The Phoenix Air Flow Experiments (PAFEX) were conducted in 1998 in an effort to improve the understanding of circulation, transport and small-scale atmospheric mixing processes in the Phoenix area. The PAFEX-I was conducted during January 14 – February 4, and PAFEX-II was carried out during July 15 – September 15, 1998 .
KeywordsOzone Concentration Complex Terrain Sonic Anemometer Julian Date National Weather Service
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