Diurnal cycle of the dust instantaneous direct radiative forcing over the Arabian Peninsula

Handle URI:
http://hdl.handle.net/10754/577019
Title:
Diurnal cycle of the dust instantaneous direct radiative forcing over the Arabian Peninsula
Authors:
Osipov, S.; Stenchikov, Georgiy L. ( 0000-0001-9033-4925 ) ; Brindley, H.; Banks, J.
Abstract:
In this study we attempted to better quantify radiative effects of dust over the Arabian Peninsula and their dependence on input parameters. For this purpose we have developed a stand-alone column radiation transport model coupled with the Mie, T-matrix and geometric optics calculations and driven by reanalysis meteorological fields and atmospheric composition. Numerical experiments were carried out for a wide range of aerosol optical depths, including extreme values developed during the dust storm on 18–20 March 2012. Comprehensive ground-based observations and satellite retrievals were used to estimate aerosol optical properties, validate calculations and carry out radiation closure. The broadband surface albedo, fluxes at the bottom and top of the atmosphere as well as instantaneous dust radiative forcing were estimated both from the model and observations. Diurnal cycle of the shortwave instantaneous dust direct radiative forcing was studied for a range of aerosol and surface characteristics representative of the Arabian Peninsula. Mechanisms and parameters responsible for diurnal variability of the radiative forcing were evaluated. We found that intrinsic variability of the surface albedo and its dependence on atmospheric conditions, along with anisotropic aerosol scattering, are mostly responsible for diurnal effects.
KAUST Department:
Applied Mathematics and Computational Science Program; Physical Sciences and Engineering (PSE) Division
Citation:
Diurnal cycle of the dust instantaneous direct radiative forcing over the Arabian Peninsula 2015, 15 (16):9537 Atmospheric Chemistry and Physics
Publisher:
Copernicus GmbH
Journal:
Atmospheric Chemistry and Physics
Issue Date:
27-Aug-2015
DOI:
10.5194/acp-15-9537-2015
Type:
Article
ISSN:
1680-7324
Additional Links:
http://www.atmos-chem-phys.net/15/9537/2015/
Appears in Collections:
Articles; Applied Mathematics and Computational Science Program; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorOsipov, S.en
dc.contributor.authorStenchikov, Georgiy L.en
dc.contributor.authorBrindley, H.en
dc.contributor.authorBanks, J.en
dc.date.accessioned2015-09-09T13:55:11Zen
dc.date.available2015-09-09T13:55:11Zen
dc.date.issued2015-08-27en
dc.identifier.citationDiurnal cycle of the dust instantaneous direct radiative forcing over the Arabian Peninsula 2015, 15 (16):9537 Atmospheric Chemistry and Physicsen
dc.identifier.issn1680-7324en
dc.identifier.doi10.5194/acp-15-9537-2015en
dc.identifier.urihttp://hdl.handle.net/10754/577019en
dc.description.abstractIn this study we attempted to better quantify radiative effects of dust over the Arabian Peninsula and their dependence on input parameters. For this purpose we have developed a stand-alone column radiation transport model coupled with the Mie, T-matrix and geometric optics calculations and driven by reanalysis meteorological fields and atmospheric composition. Numerical experiments were carried out for a wide range of aerosol optical depths, including extreme values developed during the dust storm on 18–20 March 2012. Comprehensive ground-based observations and satellite retrievals were used to estimate aerosol optical properties, validate calculations and carry out radiation closure. The broadband surface albedo, fluxes at the bottom and top of the atmosphere as well as instantaneous dust radiative forcing were estimated both from the model and observations. Diurnal cycle of the shortwave instantaneous dust direct radiative forcing was studied for a range of aerosol and surface characteristics representative of the Arabian Peninsula. Mechanisms and parameters responsible for diurnal variability of the radiative forcing were evaluated. We found that intrinsic variability of the surface albedo and its dependence on atmospheric conditions, along with anisotropic aerosol scattering, are mostly responsible for diurnal effects.en
dc.language.isoenen
dc.publisherCopernicus GmbHen
dc.relation.urlhttp://www.atmos-chem-phys.net/15/9537/2015/en
dc.rightsThis work is distributed under the Creative Commons Attribution 3.0 License.en
dc.titleDiurnal cycle of the dust instantaneous direct radiative forcing over the Arabian Peninsulaen
dc.typeArticleen
dc.contributor.departmentApplied Mathematics and Computational Science Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalAtmospheric Chemistry and Physicsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorStenchikov, Georgiy L.en
kaust.authorOsipov, S.en
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