Biomass burning in Southeast Asia peaks in late winter or early spring as farmers begin to prepare land for seasonal planting. The widespread nature of the burning creates a seasonal pattern of emissions that play a significant role in regional air pollution, including tropospheric earthobservatory.nasa.gov/Library/ChemistrySunlight/ ozone. (Ozone can be both beneficial and harmful in the atmosphere, depending on its altitude. High up in the stratosphere, ozone protects the planet from harmful UV radiation. Closer to earth, tropospheric ozone is a harmful air pollutant.)
Like most parts of the world, the burning in Southeast Asia exhibits a diurnal (daily) cycle, in which burning is less widespread in the morning and increases throughout the day. Compare this morning image of Southeast Asia, including (left to right) Thailand, Cambodia, Laos, and Vietnam, captured by the modis.gsfc.nasa.gov Moderate Resolution Imaging Spectroradiometer (MODIS) on the terra.nasa.gov/ Terra satellite to the same area captured by aqua.nasa.gov Aqua MODIS earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=5390 in the afternoon. Note the dramatic increase in fires (red dots) in the afternoon image. This image was acquired Jan. 31, 2003.
The high-resolution image provided above is 500 meters per pixel. The MODIS Rapid Response System provides this image at MODIS' maximum spatial resolution of rapidfire.sci.gsfc.nasa.gov/gallery/?2003031-0131/Indochina.A2003031.0330.250m.jpg 250 meters.
Image courtesy Jeff Schmaltz, rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team, NASA GSFC
| Date Taken: | 07.23.2011 |
| Date Posted: | 02.08.2013 11:34 |
| Photo ID: | 846167 |
| Resolution: | 1700x2200 |
| Size: | 755.82 KB |
| Location: | WASHINGTON, D.C., US |
| Web Views: | 2 |
| Downloads: | 1 |
