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Simulation of solar radiation during a total eclipse: a challenge for radiative transfer

Emde, Claudia und Mayer, Bernhard (2007) Simulation of solar radiation during a total eclipse: a challenge for radiative transfer. Atmospheric Chemistry and Physics, 7, Seiten 2259-2270.

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Offizielle URL: http://www.atmos-chem-phys.net/7/2259/2007

Kurzfassung

A solar eclipse is a rare but spectacular natural phenomenon and furthermore it is a challenge for radiative transfer modelling. Whereas a simple one-dimensional radiative transfer model with reduced solar irradiance at the top of the atmosphere can be used to calculate the brightness during partial eclipses a much more sophisticated model is required to calculate the brightness (i.e. the diffuse radiation) during the total eclipse. The reason is that radiation reaching a detector in the shadow gets there exclusively by horizontal transport of photons in a spherical shell atmosphere, which requires a three-dimensional radiative transfer model. In this study the first fully three-dimensional simulations for a solar eclipse are presented exemplified by the solar eclipse at 29 March 2006. Using a backward Monte Carlo model we calculated the diffuse radiation in the umbra and simulated the changing colours of the sky. Radiance and irradiance are decreased by 3 to 4 orders of magnitude, depending on wavelength. We found that aerosol has a comparatively small impact on the radiation in the umbra. We also estimated the contribution of the solar corona to the radiation under the umbra and found that it is negligible compared to the diffuse solar radiation in the wavelength region from 310 to 500 nm.

Dokumentart:Zeitschriftenbeitrag
Titel:Simulation of solar radiation during a total eclipse: a challenge for radiative transfer
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Emde, ClaudiaNICHT SPEZIFIZIERT
Mayer, BernhardNICHT SPEZIFIZIERT
Datum:4 Mai 2007
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:7
Seitenbereich:Seiten 2259-2270
Status:veröffentlicht
Stichwörter:3-D radiative transfer, solar radiation, solar eclipse
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Fernerkundung der Atmosphäre
Hinterlegt von: Dr.rer.nat. Claudia Emde
Hinterlegt am:22 Mai 2007
Letzte Änderung:20 Okt 2014 14:31

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