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A new method to retrieve the aerosol layer absorption coefficient from airborne flux density and actinic radiation measurements

Bierwirth, Eike und Wendisch, Manfred und Jäkel, Evelyn und Ehrlich, André und Schmidt, K. Sebastian und Stark, Harald und Pilewskie, Peter und Esselborn, Michael und Gobbi, Gian Paolo und Ferrare, Richard und Müller, Thomas und Clarke, Antony (2010) A new method to retrieve the aerosol layer absorption coefficient from airborne flux density and actinic radiation measurements. Journal of Geophysical Research, 115 (D14211), Seiten 1-11. DOI: 10.1029/2009JD013636.

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Offizielle URL: http://www.agu.org/journals/jd/jd1011/2009JD012523/2009JD012523.pdf

Kurzfassung

A new method is presented to derive the mean value of the spectral absorption coefficient of an aerosol layer from combined airborne measurements of spectral net irradiance and actinic flux density. While the method is based on a theoretical relationship of radiative transfer theory, it is applied to atmospheric radiation measurements for the first time. The data have been collected with the Spectral Modular Airborne Radiation Measurement System (SMART‐Albedometer), the Solar Spectral Flux Radiometer (SSFR), and the Actinic Flux Spectroradiometer (AFSR) during four field campaigns between 2002 and 2008 (the Saharan Mineral Dust Experiment (SAMUM), the Influence of Clouds on the Spectral Actinic Flux in the Lower Troposphere (INSPECTRO) project, and the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites and Aerosol, Radiation, and Cloud Processes Affecting Arctic Climate (ARCTAS/ARCPAC) projects). The retrieval algorithm is tested in a series of radiative transfer model runs and then applied to measurement cases with different aerosol species and loading. The method is shown to be a feasible approach to obtain the mean aerosol absorption coefficient across a given accessible altitude range. The results indicate that the method is viable whenever the difference of the net irradiance at the top and bottom of a layer is equal to or higher than the measurement uncertainty for net irradiance. This can be achieved by a high optical depth or a low single‐scattering albedo within the layer.

Dokumentart:Zeitschriftenbeitrag
Titel:A new method to retrieve the aerosol layer absorption coefficient from airborne flux density and actinic radiation measurements
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Bierwirth, EikeUniv. of Colorado, Boulder, CO, USA
Wendisch, ManfredUniv. Leipzig, Leipzig
Jäkel, EvelynJohannes Gutenberg Univ. Mainz, Mainz
Ehrlich, AndréUniv. Leipzig, Leipzig
Schmidt, K. SebastianUniv. of Colorado, Boulder, CO, USA
Stark, HaraldNOAA, Boulder, CO, USA
Pilewskie, PeterUniv. of Colorado, Boulder, CO, USA
Esselborn, MichaelDLR
Gobbi, Gian PaoloCNR, Rome, I
Ferrare, RichardNASA Langley Research Center, Hampton, VA, USA
Müller, ThomasIfT, Leipzig
Clarke, AntonyUniv. of Hawai‘i at Mānoa, Honolulu, HI, USA
Datum:2010
Erschienen in:Journal of Geophysical Research
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:115
DOI :10.1029/2009JD013636
Seitenbereich:Seiten 1-11
Status:veröffentlicht
Stichwörter:SMART‐Albedometer, SAMUM, SSFR, ARCTAS/ARCPAC
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 > Lidar
Hinterlegt von: Jana Freund
Hinterlegt am:16 Aug 2010 17:47
Letzte Änderung:23 Jan 2014 11:36

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