Document Detail


Intensification of Pacific storm track linked to Asian pollution.
MedLine Citation:
PMID:  17374719     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Indirect radiative forcing of atmospheric aerosols by modification of cloud processes poses the largest uncertainty in climate prediction. We show here a trend of increasing deep convective clouds over the Pacific Ocean in winter from long-term satellite cloud measurements (1984-2005). Simulations with a cloud-resolving weather research and forecast model reveal that the increased deep convective clouds are reproduced when accounting for the aerosol effect from the Asian pollution outflow, which leads to large-scale enhanced convection and precipitation and hence an intensified storm track over the Pacific. We suggest that the wintertime Pacific is highly vulnerable to the aerosol-cloud interaction because of favorable cloud dynamical and microphysical conditions from the coupling between the Pacific storm track and Asian pollution outflow. The intensified Pacific storm track is climatically significant and represents possibly the first detected climate signal of the aerosol-cloud interaction associated with anthropogenic pollution. In addition to radiative forcing on climate, intensification of the Pacific storm track likely impacts the global general circulation due to its fundamental role in meridional heat transport and forcing of stationary waves.
Authors:
Renyi Zhang; Guohui Li; Jiwen Fan; Dong L Wu; Mario J Molina
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-03-20
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  104     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-03-28     Completed Date:  2007-05-14     Revised Date:  2010-09-15    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5295-9     Citation Subset:  IM    
Affiliation:
Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843, USA. zhang@ariel.met.tamu.edu
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MeSH Terms
Descriptor/Qualifier:
Aerosols
Air Movements
Air Pollutants*
Atmosphere
Climate
Computer Simulation
Environment
Environmental Pollution*
Pacific Ocean
Time Factors
Weather*
Wind
Chemical
Reg. No./Substance:
0/Aerosols; 0/Air Pollutants
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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