ESRL Quarterly Newsletter - Fall 2010

By the Numbers

Los Angeles ozone reaches Colorado

1,000 miles: The distance that ozone and possibly other pollutants from the Los Angeles Basin can travel due to the “mountain chimney effect” of Southern California’s San Gabriel Mountains, pictured.

At the fall AMS Mountain Meteorology Conference, Andy Langford and Bob Banta (CSD) discussed results from airborne lidar measurements of ozone made above the Los Angeles Basin in 2009. Their results—also published in Geophysical Research Letters with Christoph Senff, Raul Alvarez, and Michael Hardesty of CSD—indicate that the mountains push polluted air up into the free troposphere, where it can travel as far as western Colorado. More: search for doi:10.1029/2010GL042507.