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An overview of a research project aimed at building a complex network of ozone transport between 15 air basins in california. The author discusses the importance of understanding local and transported ozone concentrations, the problems faced in determining background ozone levels and transport patterns, and the methodology used to analyze statistical data and back trajectory analysis. The document also mentions the sources of data used in the study.
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California is divided into 15 Air Basins to better manage air pollution. Air basin boundaries were decided by grouping similar geographic features together. Some air basins really are like a basin, with valleys surrounded by mountains. Political boundaries, Such as counties, were also important.
Local Ozone
=
cities and natural events such as wildfires)
7
Analyses of the time of peak ozone concentration at various monitoring sites can yield useful information on transport patterns and source areas.
In most major source areas of interest in California, transport winds are light in the morning, allowing ozone precursor concentrations to build up and zone to form.
A B
A Wind^ B
Morning
Peak Local Ozone = Incoming (natural background + transported anthropogenic) + Local Anthropogenic
Ran multiple backward trajectories each day for five years (2001–2005, April–October); Determined the daily peak 8-hr ozone concentration at the last site near which each trajectory passed during daylight hours prior to entering each city; and Averaged all concentrations to estimate incoming boundary layer concentration each day.
How to connect this network to our
course?
Ozone Transport sketch map of San Francisco Bay Area Air Basin
Where my data come from?
Air Resources Board.
one of the most extensive in the world, consisting of over 250 sites where air pollution levels are monitored and more than 700 monitors used to measure the pollutant levels.
http://www.arb.ca.gov