Advanced

Smoking Rain Clouds over the Amazon

Andreae, Meinrat O.; Rosenfeld, Daniel; Artaxo, P.; Costa, A. A.; Frank, Göran LU ; Longo, K. M. and Silva-Dias, M. A. F. (2004) In Science 303(5662). p.1337-1342
Abstract
Heavy smoke from forest fires in the Amazon was observed to reduce cloud droplet size and so delay the onset of precipitation from 1.5 kilometers above cloud base in pristine clouds to more than 5 kilometers in polluted clouds and more than 7 kilometers in pyro-clouds. Suppression of low-level rainout and aerosol washout allows transport of water and smoke to upper levels, where the clouds appear “smoking” as they detrain much of the pollution. Elevating the onset of precipitation allows invigoration of the updrafts,causing intense thunderstorms, large hail, and greater likelihood for overshooting cloud tops into the stratosphere. There,detrained pollutants and water vapor would have profound radiative impacts on the climate system. The... (More)
Heavy smoke from forest fires in the Amazon was observed to reduce cloud droplet size and so delay the onset of precipitation from 1.5 kilometers above cloud base in pristine clouds to more than 5 kilometers in polluted clouds and more than 7 kilometers in pyro-clouds. Suppression of low-level rainout and aerosol washout allows transport of water and smoke to upper levels, where the clouds appear “smoking” as they detrain much of the pollution. Elevating the onset of precipitation allows invigoration of the updrafts,causing intense thunderstorms, large hail, and greater likelihood for overshooting cloud tops into the stratosphere. There,detrained pollutants and water vapor would have profound radiative impacts on the climate system. The invigorated storms release the latent heat higher in the atmosphere. This should substantially affect the regional and global circulation systems. Together,these processes affect the water cycle, the pollution burden of the atmosphere, and the dynamics of atmospheric circulation. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science
volume
303
issue
5662
pages
1337 - 1342
publisher
The American Association for the Advancement of Science
external identifiers
  • scopus:1442354691
ISSN
1095-9203
DOI
10.1126/science.1092779
language
English
LU publication?
no
id
cf59e3fa-107a-4b0c-bbf3-358f8116a473 (old id 1041305)
date added to LUP
2008-03-26 16:53:39
date last changed
2017-12-10 04:31:08
@article{cf59e3fa-107a-4b0c-bbf3-358f8116a473,
  abstract     = {Heavy smoke from forest fires in the Amazon was observed to reduce cloud droplet size and so delay the onset of precipitation from 1.5 kilometers above cloud base in pristine clouds to more than 5 kilometers in polluted clouds and more than 7 kilometers in pyro-clouds. Suppression of low-level rainout and aerosol washout allows transport of water and smoke to upper levels, where the clouds appear “smoking” as they detrain much of the pollution. Elevating the onset of precipitation allows invigoration of the updrafts,causing intense thunderstorms, large hail, and greater likelihood for overshooting cloud tops into the stratosphere. There,detrained pollutants and water vapor would have profound radiative impacts on the climate system. The invigorated storms release the latent heat higher in the atmosphere. This should substantially affect the regional and global circulation systems. Together,these processes affect the water cycle, the pollution burden of the atmosphere, and the dynamics of atmospheric circulation.},
  author       = {Andreae, Meinrat O. and Rosenfeld, Daniel and Artaxo, P. and Costa, A. A. and Frank, Göran and Longo, K. M. and Silva-Dias, M. A. F.},
  issn         = {1095-9203},
  language     = {eng},
  number       = {5662},
  pages        = {1337--1342},
  publisher    = {The American Association for the Advancement of Science},
  series       = {Science},
  title        = {Smoking Rain Clouds over the Amazon},
  url          = {http://dx.doi.org/10.1126/science.1092779},
  volume       = {303},
  year         = {2004},
}