Imperial College London
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Professor Helen Brindley

Faculty of Natural Sciences, Department of Physics

Professor in Earth Observation
 
 
 
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Contact

 

+44 (0)20 7594 7673h.brindley

 
 
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Location

 

717Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Brindley:2015:10.1002/2015JD023282,
author = {Brindley, H and Osipov, S and Bantges, R and Smirnov, A and Banks, J and Levy, R and Prakash, PJ and Stenchikov, G},
doi = {10.1002/2015JD023282},
journal = {Journal of Geophysical Research: Atmospheres},
pages = {10862--10878},
title = {An assessment of the quality of aerosol retrievals over the Red Sea and evaluation of the climatological cloud-free dust direct radiative effect in the region},
url = {http://dx.doi.org/10.1002/2015JD023282},
volume = {120},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Ground-based and satellite observations are used in conjunction with the Rapid Radiative Transfer Model (RRTM) to assess climatological aerosol loading and the associated cloud-free aerosol direct radiative effect (DRE) over the Red Sea. Aerosol optical depth (AOD) retrievals from the Moderate Resolution Imaging Spectroradiometer and Spinning Enhanced Visible and InfraRed Imager (SEVIRI) instruments are first evaluated via comparison with ship-based observations. Correlations are typically better than 0.9 with very small root-mean-square and bias differences. Calculations of the DRE along the ship cruises using RRTM also show good agreement with colocated estimates from the Geostationary Earth Radiation Budget instrument if the aerosol asymmetry parameter is adjusted to account for the presence of large particles. A monthly climatology of AOD over the Red Sea is then created from 5 years of SEVIRI retrievals. This shows enhanced aerosol loading and a distinct north to south gradient across the basin in the summer relative to the winter months. The climatology is used with RRTM to estimate the DRE at the top and bottom of the atmosphere and the atmospheric absorption due to dust aerosol. These climatological estimates indicate that although longwave effects can reach tens of W m−2, shortwave cooling typically dominates the net radiative effect over the Sea, being particularly pronounced in the summer, reaching 60 W m−2 at the surface. The spatial gradient in summertime AOD is reflected in the radiative effect at the surface and in associated differential heating by aerosol within the atmosphere above the Sea. This asymmetric effect is expected to exert a significant influence on the regional atmospheric and oceanic circulation.
AU  - Brindley,H
AU  - Osipov,S
AU  - Bantges,R
AU  - Smirnov,A
AU  - Banks,J
AU  - Levy,R
AU  - Prakash,PJ
AU  - Stenchikov,G
DO  - 10.1002/2015JD023282
EP  - 10878
PY  - 2015///
SN  - 2169-897X
SP  - 10862
TI  - An assessment of the quality of aerosol retrievals over the Red Sea and evaluation of the climatological cloud-free dust direct radiative effect in the region
T2  - Journal of Geophysical Research: Atmospheres
UR  - http://dx.doi.org/10.1002/2015JD023282
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000209847000017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/49143
VL  - 120
ER  -
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