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Diurnal Cycle of the Dust Instantaneous Direct Radiative Forcing Over the Arabian Peninsula : Volume 15, Issue 8 (24/04/2015)

By Osipov, S.

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Book Id: WPLBN0003981562
Format Type: PDF Article :
File Size: Pages 52
Reproduction Date: 2015

Title: Diurnal Cycle of the Dust Instantaneous Direct Radiative Forcing Over the Arabian Peninsula : Volume 15, Issue 8 (24/04/2015)  
Author: Osipov, S.
Volume: Vol. 15, Issue 8
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Stenchikov, G., Banks, J., Brindley, H., & Osipov, S. (2015). Diurnal Cycle of the Dust Instantaneous Direct Radiative Forcing Over the Arabian Peninsula : Volume 15, Issue 8 (24/04/2015). Retrieved from

Description: King Abdullah University of Science and Technology, Thuwal, Saudi Arabia. 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 standalone column radiation transport model coupled with the Mie 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 the shortwave instantaneous dust direct radiative forcing was studied for a range of aerosol and surface characteristics representative for 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.

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

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