The Untold Story of Pyrocumulonimbus

The Untold Story of Pyrocumulonimbus Wildfire is becoming the focus of increasing attention. It is now realized that changes in the occurrence frequency and intensity of wildfires has important significant consequences for a variety of important problems, including atmospheric change and safety in the urbanwildland interface. One important but poorly understood aspect of wildfire behaviorpyrocumulonimbus firestorm dynamics and atmospheric impacthas a curious history of theory and observation. The pyroCb is a fire-started or fire-augmented thunderstorm that in its most extreme manifestation injects huge abundances of smoke and other biomass-burning emissions into the lower stratosphere. The observed hemispheric spread of smoke and other biomass-burning emissions could have important climate consequences. PyroCbs have been spawned naturally and through anthropogenesis, and they are hypothesized as being part of the theoretical Nuclear nuclear winter work. However, direct attribution of the stratospheric aerosols to the pyroCb only occurred in the last decade. Such an extreme injection by thunderstorms was previously judged to be unlikely because the extratopical tropopause is considered to be a strong barrier to convection.Two recurring themes have developed as pyroCb research unfolds. First, some mystery layer eventspuzzling stratospheric aerosol-layer observationsand other layers reported as volcanic aerosol, can now be explained in terms of pyroconvection. Second, pyroCb events occur surprisingly frequently, and they are likely a relevant aspect of several historic wildfires. Here we show that pyroCbs offer a plausible alternate explanation for phenomena that were previously assumed to involve volcanic aerosols in 19891991. In addition, we survey the Canada/U.S. fire season of 2002 and identify 17 pyroCbs, some of which are associated with newsworthy fires, such as the Hayman, Rodeo/Chediski, and Biscuit Fires. Some of these pyroCbs injected smoke into the lowermost stratosphere. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

Loading next page...
 
/lp/ams/the-untold-story-of-pyrocumulonimbus-dngmTQvaa0
Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
D.O.I.
10.1175/2010BAMS3004.1
Publisher site
See Article on Publisher Site

Abstract

Wildfire is becoming the focus of increasing attention. It is now realized that changes in the occurrence frequency and intensity of wildfires has important significant consequences for a variety of important problems, including atmospheric change and safety in the urbanwildland interface. One important but poorly understood aspect of wildfire behaviorpyrocumulonimbus firestorm dynamics and atmospheric impacthas a curious history of theory and observation. The pyroCb is a fire-started or fire-augmented thunderstorm that in its most extreme manifestation injects huge abundances of smoke and other biomass-burning emissions into the lower stratosphere. The observed hemispheric spread of smoke and other biomass-burning emissions could have important climate consequences. PyroCbs have been spawned naturally and through anthropogenesis, and they are hypothesized as being part of the theoretical Nuclear nuclear winter work. However, direct attribution of the stratospheric aerosols to the pyroCb only occurred in the last decade. Such an extreme injection by thunderstorms was previously judged to be unlikely because the extratopical tropopause is considered to be a strong barrier to convection.Two recurring themes have developed as pyroCb research unfolds. First, some mystery layer eventspuzzling stratospheric aerosol-layer observationsand other layers reported as volcanic aerosol, can now be explained in terms of pyroconvection. Second, pyroCb events occur surprisingly frequently, and they are likely a relevant aspect of several historic wildfires. Here we show that pyroCbs offer a plausible alternate explanation for phenomena that were previously assumed to involve volcanic aerosols in 19891991. In addition, we survey the Canada/U.S. fire season of 2002 and identify 17 pyroCbs, some of which are associated with newsworthy fires, such as the Hayman, Rodeo/Chediski, and Biscuit Fires. Some of these pyroCbs injected smoke into the lowermost stratosphere.

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Oct 1, 2010

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial