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Title: Changes in the vertical temperature structure associated with carbonaceous aerosols

Changes in the vertical temperature structure associated with carbonaceous aerosols Carbonaceous aerosols from anthropogenic activities act to both scatter and absorb solar radiation. It has been postulated that absorption by aerosols might significantly alter both the vertical temperature structure of the atmosphere and cloud fraction [Hansen et al. 1997, Ackerman et al, 2000]. Since both effects may alter the assessment of climate change associated with human activities, it is very important to understand both the magnitude and the mechanism by which carbonaceous aerosols affect climate. In this paper, we used a coupled climate and chemistry transport model to estimate the effects of carbonaceous aerosols on the vertical temperature structure and their effects on cloud fraction. A series Of control simulations were also carried out to compare the results of the model in which carbonaceous aerosols interact with climate with those in which they do not. We will present the temperature difference between simulations that include the effect of black carbon on the radiation field and those that do not, both at the surface and in the free troposphere. We will also discuss the change of temperature lapse rate and changes of cloud fraction associated with black carbon.
Authors: ; ; ; ;
Publication Date:
OSTI Identifier:15013443
Report Number(s):UCRL-JC-147529
TRN: US200601%%405
DOE Contract Number:W-7405-ENG-48
Resource Type:Conference
Resource Relation:Conference: 81st Annual Meeting of the American Meteoroligical Society, Albuquerque, NM, Jan 14 - Jan 19, 2001
Research Org:Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:USDOE
Country of Publication:United States
Language:English
Subject: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; AEROSOLS; CARBON; CHEMISTRY; CLIMATES; CLOUDS; RADIATIONS; SOLAR RADIATION; TRANSPORT; TROPOSPHERE