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Science 15 February 2002:
Vol. 295. no. 5558, pp. 1272 - 1275
DOI: 10.1126/science.1065080

Reports

A Microphysical Connection Among Biomass Burning, Cumulus Clouds, and Stratospheric Moisture

Steven Sherwood

A likely causal chain is established here that connects humidity in the stratosphere, relative humidity near the tropical tropopause, ice crystal size in towering cumulus clouds, and aerosols associated with tropical biomass burning. The connections are revealed in satellite-observed fluctuations of each quantity on monthly to yearly time scales. More aerosols lead to smaller ice crystals and more water vapor entering the stratosphere. The connections are consistent with physical reasoning, probably hold on longer time scales, and may help to explain why stratospheric water vapor appears to have been increasing for the past five decades.

Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA. E-mail: steven.sherwood{at}yale.edu


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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
From the Cover: Short circuit of water vapor and polluted air to the global stratosphere by convective transport over the Tibetan Plateau.
R. Fu, Y. Hu, J. S. Wright, J. H. Jiang, R. E. Dickinson, M. Chen, M. Filipiak, W. G. Read, J. W. Waters, and D. L. Wu (2006)
PNAS 103, 5664-5669
   Abstract »    Full Text »    PDF »
Evidence for the Predominance of Mid-Tropospheric Aerosols as Subtropical Anvil Cloud Nuclei.
A. M. Fridlind, A. S. Ackerman, E. J. Jensen, A. J. Heymsfield, M. R. Poellot, D. E. Stevens, D. Wang, L. M. Miloshevich, D. Baumgardner, R. P. Lawson, et al. (2004)
Science 304, 718-722
   Abstract »    Full Text »    PDF »
Smoking Rain Clouds over the Amazon.
M. O. Andreae, D. Rosenfeld, P. Artaxo, A. A. Costa, G. P. Frank, K. M. Longo, and M. A. F. Silva-Dias (2004)
Science 303, 1337-1342
   Abstract »    Full Text »    PDF »



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Science. ISSN 0036-8075 (print), 1095-9203 (online)