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Satellite-based Estimate of Aerosol Direct Radiative Effect Over the South-east Atlantic : Volume 13, Issue 9 (05/09/2013)

By Costantino, L.

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Book Id: WPLBN0003996346
Format Type: PDF Article :
File Size: Pages 30
Reproduction Date: 2015

Title: Satellite-based Estimate of Aerosol Direct Radiative Effect Over the South-east Atlantic : Volume 13, Issue 9 (05/09/2013)  
Author: Costantino, L.
Volume: Vol. 13, Issue 9
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Bréon, F., & Costantino, L. (2013). Satellite-based Estimate of Aerosol Direct Radiative Effect Over the South-east Atlantic : Volume 13, Issue 9 (05/09/2013). Retrieved from http://www.ebooklibrary.org/


Description
Description: Laboratoire des Sciences du Climat et de l'Environnement Unité Mixte de Recherche CEA-CNRS-UVSQ, UMR8212, 91191 Gif sur Yvette, France. The net effect of aerosol Direct Radiative Forcing (DRF) is the balance between the scattering effect that reflects solar radiation back to space (cooling), and the absorption that decreases the reflected sunlight (warming). The amplitude of these two effects and their balance depends on the aerosol load, its absorptivity, the cloud fraction and the respective position of aerosol and cloud layers.

In this study, we use the information provided by CALIOP (CALIPSO satellite) and MODIS (AQUA satellite) instruments as input data to a Rapid Radiative Transfer Model (RRTM) and quantify the shortwave (SW) aerosol direct atmospheric forcing, over the South-East Atlantic. The combination of the passive and active measurements allows estimates of the horizontal and vertical distributions of the aerosol and cloud parameters. We use a parametrization of the Single Scattering Albedo (SSA) based on the satellite-derived Angstrom coefficient.

The South East Atlantic is a particular region, where bright stratocumulus clouds are often topped by absorbing smoke particles. Results from radiative transfer simulations confirm the similar amplitude of the cooling effect, due to light scattering by the aerosols, and the warming effect, due to the absorption by the same particles. Over six years of satellite retrievals, from 2005 to 2010, the South-East Atlantic all-sky SW DRF is −0.03 W m−2, with a spatial standard deviation of 8.03 W m−2. In good agreement with previous estimates, statistics show that a cloud fraction larger than 0.5 is generally associated with positive all-sky DRF. In case of cloudy-sky and aerosol located only above the cloud top, a SSA larger than 0.91 and cloud optical thickness larger than 4 can be considered as threshold values, beyond which the resulting radiative forcing becomes positive.


Summary
Satellite-based estimate of aerosol direct radiative effect over the South-East Atlantic

Excerpt
Abel, S. J., Highwood, E. J., Haywood, J. M., and Stringer, M. A.: The direct radiative effect of biomass burning aerosols over southern Africa, Atmos. Chem. Phys., 5, 1999–2018, doi:10.5194/acp-5-1999-2005, 2005.; Bréon F. M. and Doutriaux-Boucher, M.: A comparison of cloud droplet radii measured from space, IEEE Trans Geosc. Rem. Sens., 43, 1796–1805, 2005.; Chand, D., Wood, R., Anderson, T. L., Satheesh, S. K., and Charlson, R. J.: Satellite-derived direct radiative effect of aerosols dependent on cloud cover, Nat. Geosci., 2, 181–184, doi:10.1038/ngeo437, 2009.; Charlson, R. J., Langer, J., Rodhe, H., Leovy, C. B., and Warren, S. G.: Perturbation of the Northern Hemisphere radiative balance by backscattering from anthropogenic aerosols, Tellus, 43, 152–163, 1991.; Charlson, R. J., Schwartz, S. E., Hales, J. M., Cess, R. D., Coakley Jr., J. A., Hansen, J. E., and Hofmann, D. J.: Climate forcing by anthropogenic aerosols, Science, 255, 423–430, 1992.; Chen, Lin, Shi, Guang-Yu, and Zhong, Ling-Zhi: Short-Wave Direct Radiative Effect of Aerosols in the Clear-Sky over Oceans from Satellites Observations, ettandgrs, vol. 1, 567–570, 2008 International Workshop on Education Technology and Training & 2008 International Workshop on Geoscience and Remote Sensing, 2008.; Chylek, P. and Wong, J.: Effect of absorbing aerosols on global radiation budget, Geophys. Res. Lett., 22, 929–931, 1995.; Costantino, L. and Bréon, F.-M.: Analysis of aerosol-cloud interaction from multi-sensor satellite observations, Geophys. Res. Lett., 37, L11801, doi:10.1029/2009GL041828, 2010.; Costantino, L. and Bréon, F.-M.: Aerosol indirect effect on warm clouds over South-East Atlantic, from co-located MODIS and CALIPSO observations, Atmos. Chem. Phys., 13, 69–88, doi:10.5194/acp-13-69-2013, 2013.; Dubovik, O., Holben, B. N., Eck, T. F., Smirnov, A., Kaufman, Y. J., Kin, G. M. D., Tanr ì, D., and Slutsker, I.: Variability of absorption and optical properties of key aerosol types observed in worldwide locations, J. Atmos. Sci., 59, 590–608, 2002.; Feingold, G., Eberhard, W. L., Veron, D. E., and Previdi, M.: First measurements of the Twomey indirect effect using ground-based remote sensors, Geophys. Res. Lett., 30, 1287, doi:10.1029/2002GL016633, 2003.; Forster, P., Ramaswamy, V., Artaxo, P., Berntsen, T., Betts, R., Fahey, D. W., Haywood, J., Lean, J., Lowe, D. C., Myhre, G., Nganga, J., Prinn, R., Raga, G., M. Schulz and Van Dorland, R.: Changes in atmospheric constituents and in radiative forcing, in: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M., and Miller, H. L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 2007.; Garay, M. J., de Szoeke, S. P., and Moroney, C. M.: Comparison of marine stratocumulus cloud top heights in the southeastern Pacific retrieved from satellites with coincident ship-based observations, J. Geophys. Res., 113, D18204, doi:10.1029/2008JD009975, 2008.; Harshvardhan, Zhao, G., Di Girolamo, L., and Green, R. N.: Satellite-observed location of stratocumulus cloudtop heights in the presence of strong inversions, IEEE T. Geosci. Remote S., 47, 1421–1428, doi:10.1109/TGRS.2008.2005406, 2009.; Hatzianastassiou, N., Matsoukas, C., Drakakis, E., Stackhouse Jr., P. W., Koepke, P., Fotiadi, A., Pavlakis, K. G., and Vardavas, I.: The direct effect of aerosols on solar radia

 

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