Nocturnal Chemistry in the Urban Boundary Layer of Los Angeles.

摘要

The State of California continues to face air quality challenges in its major urban areas. Ozone and particulate matter (PM) levels in the South Coast Air Basin exceed the California and Federal standard regularly, and the ever growing population makes the development of further strategies to improve air quality a priority. To support the States air pollution mitigation goals this project focused on the investigation of nocturnal chemistry in the Los Angeles basin. While often ignored, nocturnal chemistry is important, as the processes occurring at night set the stage for air quality conditions on the next day. To support other research efforts to better understand the processes underlying air pollution the University of California Los Angeles (UCLA) organized the CalNex Los Angeles supersite, which was located on the campus of the California Institute of Technology. The supersite, which hosted more than 40 research groups, yielded a highly comprehensive data set of gaseous and particulate pollutants and meteorological parameters from May 15, 2010 to June 16, 2010.