NASA image: Pyrocumulus cloud billows from New Mexico fire

On June 12, 2013, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image of the Silver fire burning east of Silver City, New Mexico. In addition to producing gray smoke plumes, the fire spawned a pyrocumulus cloud—a tall, cauliflower-shaped cloud that billowed up above the smoke.

Pyrocumulus clouds are similar to cumulus clouds, but the heat that forces the air to rise (which leads to cooling and condensation of water vapor) comes from fire instead of sun-warmed ground. In , pyrocumulus cloud appear as opaque white patches hovering over darker smoke.

Scientists monitor closely because the clouds can inject smoke and pollutants high into the atmosphere. As pollutants are dispersed by wind, they can affect air quality over a broad area. As noted by the University Maryland at Baltimore County (UMBC) Smog Blog, the smoke from the fire contributed to elevated concentrations of particulate matter over much of the southeastern United States on June 13, 2013.

A preliminary analysis by University of Wisconsin Scott Bachmeier indicated that the maximum height of the pryocumulus cloud from Silver fire was between 10 and 11 kilometers (6 and 7 miles). The temperature at the top of the clouds was between -45°C to -50°C, about 20 degrees warmer than the temperatures at the top of other nearby clouds that were not produced by fires.


Explore further:

NASA image: Thompson Ridge Fire, New Mexico

add to favorites
email to friend
print
save as pdf

Source Article from http://phys.org/news290710133.html

Views: 0

You can leave a response, or trackback from your own site.

Leave a Reply

Powered by WordPress | Designed by: Premium WordPress Themes | Thanks to Themes Gallery, Bromoney and Wordpress Themes