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  Dust layer effects on the atmospheric radiative budget and heating rate profiles

Perrone, M. R., Tafuro, A. M., & Kinne, S. (2012). Dust layer effects on the atmospheric radiative budget and heating rate profiles. Atmospheric Environment, 59, 344-354. doi:10.1016/j.atmosenv.2012.06.012.

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Perrone, M. R., Autor
Tafuro, A. M., Autor
Kinne, S.1, 2, Autor           
Affiliations:
1The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_913550              
2Observations and Process Studies, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_913575              

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Schlagwörter: Aerosol direct radiative effects; Aerosol heating rates; Aerosol vertical profiles; Desert dust properties
 Zusammenfassung: The effect of mineral aerosol optical properties and vertical distribution on clear-sky, instantaneous and daily-average aerosol direct radiative effects (DREs) and heating rates (HRs) is analyzed in the solar (S, 0.3-4 μm) and terrestrial (T, 4-80 μm) spectral domain, respectively. The used radiative transfer model is based on lidar, sun-sky photometer, and radiosonde measurements. The study focuses on the Sahara dust outbreak of July 16, 2009 which advected dust particles from north-western Africa over south-eastern Italy. Clear-sky, instantaneous aerosol DREs and HRs undergo large changes within few hours, for the variability of the dust aerosol properties and vertical distribution. The daily-average, clear-sky aerosol S-DRE is near -5 Wm -2 and -12 Wm -2 at the top of the atmosphere (ToA) and surface (sfc), respectively. The daily-average aerosol T-DRE offsets the S-DRE by about one third at the ToA and by about one half at the surface. The daily average aerosol HR integrated over the whole aerosol column is 0.5 and -0.3 K day -1 in the S and T domain, respectively. Thus, the all-wave integrated HR is 0.2 K day -1. These results highlight the importance of accounting for the interaction of dust particles with T and S radiation. Sensitivity tests indicate that the uncertainties of the aerosol refractive index, size distribution, and vertical distribution have on average a large impact on aerosol HRs in the S and T domain, respectively. Refractive index and aerosol size distribution uncertainties also have a large impact on S- and T-DREs. The aerosol vertical distribution that has a negligible impact on aerosol S-DREs, is important for aerosol T-DREs. It is also shown that aerosol HRs and DREs in the terrestrial domain are affected by the water vapour vertical distribution. © 2012 Elsevier Ltd.

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Sprache(n): eng - English
 Datum: 20122012-11
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.atmosenv.2012.06.012
 Art des Abschluß: -

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Titel: Atmospheric Environment
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford [England] : Pergamon
Seiten: - Band / Heft: 59 Artikelnummer: - Start- / Endseite: 344 - 354 Identifikator: ISSN: 1352-2310
CoNE: https://pure.mpg.de/cone/journals/resource/958480288336