Ground-Based Measured and Calculated Spectra of Actinic Flux Density and Downward UV Irradiance in Cloudless Conditions and their Sensitivity to Aerosol Microphysical Properties
Früh, Barbara and Eckstein, Eva and Trautmann, Thomas and Wendisch, Manfred and Fiebig, Markus and Feister, Uwe (2003) Ground-Based Measured and Calculated Spectra of Actinic Flux Density and Downward UV Irradiance in Cloudless Conditions and their Sensitivity to Aerosol Microphysical Properties. Journal of Geophysical Research, 108 (D16), . DOI: 10.1029/2002JD002933.
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Ground-based spectral measurements of actinic flux density (300–660 nm wavelength) and downward UV irradiance (300–324 nm) under cloudless conditions have been compared with the results of one-dimensional radiative transfer calculations employing concurrent airborne vertical profile measurements of aerosol particle size distributions. Good agreement (within ±10%) between measured and calculated spectra was found. The remaining differences were explained by uncertainties inherent in the aerosol particle microphysical input data and the column ozone content. A respective sensitivity analysis of the calculated spectra, which was based on the observed variability of microphysical properties, has shown that the particle number concentration is the most crucial input uncertainty for both the actinic flux density and the UV irradiance. For the wavelength range investigated, the uncertainty of the column ozone content is of minor importance for both spectral quantities.
|Title:||Ground-Based Measured and Calculated Spectra of Actinic Flux Density and Downward UV Irradiance in Cloudless Conditions and their Sensitivity to Aerosol Microphysical Properties|
|Journal or Publication Title:||Journal of Geophysical Research|
|In ISI Web of Science:||Yes|
|Keywords:||actinic flux, UV irradiance, aerosol radiative forcing, radiative transfer simulations, aerosols and particles, transmission and scattering of radiation|
|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):||W - Vorhaben Entwicklung von Atmosphärenprozessoren (old)|
|Institutes and Institutions:||Remote Sensing Technology Institute > Atmospheric Processors|
|Deposited By:||Prof.Dr. Thomas Trautmann|
|Deposited On:||23 Jul 2007|
|Last Modified:||27 Apr 2009 14:06|
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