Three-dimensional solar radiation effects on the actinic flux field in a biomass-burning plume
Trentmann, Jörg and Früh, Barbara and Boucher, Olivier and Trautmann, Thomas and Andreae, Meinrat O. (2003) Three-dimensional solar radiation effects on the actinic flux field in a biomass-burning plume. Journal of Geophysical Research, 108 (17), .
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Three-dimensional (3-D) solar radiative transfer models describe radiative transfer under inhomogeneous atmospheric conditions more accurately than the commonly used one-dimensional (1-D) radiative transfer models that assume horizontal homogeneity of the atmosphere. Here results of 3-D radiative transfer simulations for a biomass-burning plume are presented and compared with local one-dimensional (l-1-D) simulations, i.e., 1-D simulations in every column of the model domain. The spatial distribution of the aerosol particles was derived from a 3-D atmospheric transport simulation. We studied the impact of 3-D radiative effects on the actinic flux within the plume center. The differences in the actinic flux between results from the 3-D and the l-1-D simulations are considerable, ranging from -40% to more than +200%, depending on the wavelength, solar zenith angle, and the absorbing properties of the aerosol. The reason for this discrepancy is the neglect of horizontal photon transport in the 1-D simulation. These large 3-D effects on the actinic flux have the potential to influence significantly the in-plume photochemistry.
|Title:||Three-dimensional solar radiation effects on the actinic flux field in a biomass-burning plume|
|Journal or Publication Title:||Journal of Geophysical Research|
|In ISI Web of Science:||Yes|
|Keywords:||Atmospheric Composition and Structure: Aerosols and particles; Atmospheric Composition and Structure: Pollution - urban and regional; Meteorology and Atmospheric Dynamics: Radiative processes|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Remote Sensing Technology Institute|
|Deposited By:||Cornelia Roehl|
|Deposited On:||17 Feb 2006|
|Last Modified:||06 Jan 2010 22:25|
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