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Aerosol modeling over Europe: 2. Interannual variability of aerosol shortwave direct radiative forcing

Marmer, Elina and Langmann, Bärbel and Hungershöfer, Katja and Trautmann, Thomas (2007) Aerosol modeling over Europe: 2. Interannual variability of aerosol shortwave direct radiative forcing. Journal of Geophysical Research - Atmosphere, 112 (D23S16), pp. 1-14. DOI: 10.1029/2006JD008040.

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Abstract

Aerosol distribution over Europe and its direct radiative forcing have been simulated with a regional atmosphere-chemistry model and an off-line radiation transfer model. Primary and secondary organic and inorganic aerosols have been considered. The simulation was conducted for meteorologically different years 2002 and 2003 to analyze the spatial and temporal variability of the aerosol distribution and the direct forcing. The accompanying paper focuses on the aerosol distribution, while radiative forcing is discussed in this paper. The mixing state of aerosols, externally or internally, is shown to influence the strength, regional distribution and sign of radiative forcing, thereby regulating the forcing efficiency. Positive top-of-the-atmosphere forcing was simulated over eastern and southeastern Europe in spring and winter because of contribution of black carbon. Its strength varies from +0.2 to +1 Wm<sup>-2</sup>, depending on aerosol mixing assumptions. Sensitivity studies show a mean European direct forcing of –0.3 Wm<sup>-2</sup> in winter and –2.5 Wm<sup>-2</sup> in summer, regionally ranging from –5 to + 4 Wm<sup>-2</sup>.

Document Type:Article
Title:Aerosol modeling over Europe: 2. Interannual variability of aerosol shortwave direct radiative forcing
Authors:
AuthorsInstitution or Email of Authors
Marmer, ElinaMax Planck Institute for Meteorology, Hamburg
Langmann, BärbelMax Planck Institute for Meteorology, Hamburg
Hungershöfer, KatjaUniversity of Leipzig, Institute for Meteorology, Leipzig
Trautmann, ThomasUNSPECIFIED
Date:3 October 2007
Journal or Publication Title:Journal of Geophysical Research - Atmosphere
Volume:112
DOI:10.1029/2006JD008040
Page Range:pp. 1-14
Status:Published
Keywords:aerosol modeling, shortwave radiative forcing, aerosol optical properties, radiative transfer
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Entwicklung von Atmosphärenprozessoren (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Prof.Dr. Thomas Trautmann
Deposited On:16 Jan 2008
Last Modified:12 Dec 2013 20:26

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