The ozone season is heating up in California. The Code Yellow (Moderate) and Code Orange (Unhealthy for Sensitive Groups) AQI values across California (below on left, overlaid with today’s MODIS Aqua true color image in Google Earth) are almost entirely due to ozone. Elsewhere, air quality is in the Code Green (Good) range except for a few isolated areas of Code Yellow conditions due to ozone in Texas and the Midwest and PM2.5 in Florida and the Mid-Atlantic (below on right, MODIS Aqua true color overlaid with AQIs in Google Earth).
NOAA’s Hazard Mapping System (HMS) Fire and Smoke Product (below) indicates several large smoke plumes associated with seasonal burning in Central America. Unfortunately the NASA Rapid Response website is down tonight, so I can’t show any MODIS true color images of the smoke. I’ll update this post with the images as soon as I can access them, so check back tomorrow if you are interested.
UPDATE: NASA MODIS Rapid Response is back up - apparently they had to do "extensive electrical work in the machine room," which is why we couldn't access the site for a few days. There are no images for April 21 or 22, however, so I can't show you the smoke over Central America.Posted by Amy Huff at April 21, 2009 9:40 PM