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Spectral surface albedo over Morocco and its impact on radiative forcing of Saharan dust

Bierwirth, Eike und Wendisch, Manfred und Ehrlich, André und Heese, Birgit und Tesche, Matthias und Althausen, Dietrich und Schladitz, Alexander und Müller, Detlef und Otto, Sebastian und Trautmann, Thomas und Dinter, Tilman und von Hoyningen-Huene, Wolfgang und Kahn, Ralph (2007) Spectral surface albedo over Morocco and its impact on radiative forcing of Saharan dust. Tellus B - Chemical and Physical Meteorology, 61B (1), Seiten 252-269. DOI: 10.1111/j.1600-0889.2008.00395.x.

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Offizielle URL: http://www3.interscience.wiley.com/journal/118533053/home

Kurzfassung

In May–June 2006, airborne and ground-based solar (0.3–2.2 μm) and thermal infrared (4–42 μm) radiation measurements have been performed in Morocco within the Saharan Mineral Dust Experiment (SAMUM). Upwelling and downwelling solar irradiances have been measured using the Spectral Modular Airborne Radiation Measurement System (SMART)-Albedometer. With these data, the areal spectral surface albedo for typical surface types in southeastern Morocco was derived from airborne measurements for the first time. The results are compared to the surface albedo retrieved from collocated satellite measurements, and partly considerable deviations are observed. Using measured surface and atmospheric properties, the spectral and broad-band dust radiative forcing at top-of-atmosphere (TOA) and at the surface has been estimated. The impact of the surface albedo on the solar radiative forcing of Saharan dust is quantified. In the SAMUM case of 19 May 2006, TOA solar radiative forcing varies by 12 W m<sup>-2</sup> per 0.1 surface-albedo change. For the thermal infrared component, values of up to +22 W m<sup>-2</sup> were derived. The net (solar plus thermal infrared) TOA radiative forcing varies between −19 and +24 W m<sup>-2</sup> for a broad-band solar surface albedo of 0.0 and 0.32, respectively. Over the bright surface of southeastern Morocco, the Saharan dust always has a net warming effect.

Dokumentart:Zeitschriftenbeitrag
Titel:Spectral surface albedo over Morocco and its impact on radiative forcing of Saharan dust
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Bierwirth, EikeInstitute for Atmospheric Physics, Johannes Gutenberg University, Mainz, Germany
Wendisch, ManfredInstitute for Atmospheric Physics, Johannes Gutenberg University, Mainz, Germany
Ehrlich, AndréInstitute for Atmospheric Physics, Johannes Gutenberg University, Mainz, Germany
Heese, BirgitLeibniz Institute for Tropospheric Research, Leipzig, Germany
Tesche, MatthiasLeibniz Institute for Tropospheric Research, Leipzig, Germany
Althausen, DietrichLeibniz Institute for Tropospheric Research, Leipzig, Germany
Schladitz, AlexanderLeibniz Institute for Tropospheric Research, Leipzig, Germany
Müller, DetlefLeibniz Institute for Tropospheric Research, Leipzig, Germany
Otto, SebastianNICHT SPEZIFIZIERT
Trautmann, ThomasNICHT SPEZIFIZIERT
Dinter, TilmanInstitute of Environmental Physics, University of Bremen, Bremen, Germany
von Hoyningen-Huene, WolfgangInstitute of Environmental Physics, University of Bremen, Bremen, Germany
Kahn, RalphLaboratory for Atmospheric and Space Physics, University of Colorado, Boulder, USA
Datum:21 Dezember 2007
Erschienen in:Tellus B - Chemical and Physical Meteorology
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:61B
DOI :10.1111/j.1600-0889.2008.00395.x
Seitenbereich:Seiten 252-269
Status:veröffentlicht
Stichwörter:Saharan mineral dust, spectral measurements, spectral radiative forcing, spectral surface albedo, spectral irradiance, radiative transfer simulations
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 Entwicklung von Atmosphärenprozessoren (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > Atmosphärenprozessoren
Hinterlegt von: Prof.Dr. Thomas Trautmann
Hinterlegt am:21 Jan 2009
Letzte Änderung:15 Jan 2010 00:05

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