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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), AAC2-1-AAC2-16. DOI: 10.1029/2002JD002933.

Full text not available from this repository.

Official URL: http://www.agu.org/journals/jd/jd0316/2002JD002933/2002JD002933.pdf

Abstract

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.

Document Type:Article
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
Authors:
AuthorsInstitution or Email of Authors
Früh, BarbaraInst. f. Physik der Atmosphäre, Johannes Gutenberg-Universität, Mainz
Eckstein, EvaMPI f. Chemie, Mainz
Trautmann, ThomasUNSPECIFIED
Wendisch, ManfredInst. f. Troposphärenforschung, Leipzig
Fiebig, MarkusUNSPECIFIED
Feister, UweMet. Observatorium, DWD, Potsdam
Date:2003
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:108
DOI:10.1029/2002JD002933
Page Range:AAC2-1-AAC2-16
Status:Published
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 (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:23 Jul 2007
Last Modified:27 Apr 2009 14:06

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