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Precipitation Response to Regional Radiative Forcing : Volume 12, Issue 2 (13/02/2012)

By Shindell, D. T.

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Book Id: WPLBN0003978757
Format Type: PDF Article :
File Size: Pages 23
Reproduction Date: 2015

Title: Precipitation Response to Regional Radiative Forcing : Volume 12, Issue 2 (13/02/2012)  
Author: Shindell, D. T.
Volume: Vol. 12, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Milly, G., Voulgarakis, A., Faluvegi, G., & Shindell, D. T. (2012). Precipitation Response to Regional Radiative Forcing : Volume 12, Issue 2 (13/02/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: NASA Goddard Institute for Space Studies and Columbia Earth Institute, New York, USA. Precipitation shifts can have large impacts on human society and ecosystems. Many aspects of how inhomogeneous radiative forcings influence precipitation remain unclear, however. Here we investigate regional precipitation responses to various forcings imposed in different latitude bands in a climate model. We find that several regions show strong, significant responses to most forcings, but the magnitude and even the sign depends upon the forcing location and type. Aerosol and ozone forcings typically induce larger responses than equivalent carbon dioxide (CO2) forcing, and the influence of remote forcings often outweighs that of local forcings. Consistent with this, ozone and especially aerosols contribute greatly to precipitation changes over the Sahel and South and East Asia in historical simulations, and inclusion of aerosols greatly increases the agreement with observed trends in these areas, which cannot be attributed to either greenhouse gases or natural forcings. Estimates of precipitation responses derived from multiplying our Regional Precipitation Potential (RPP; the response per unit forcing relationships) by historical forcings typically capture the actual response in full transient climate simulations fairly well, suggesting that these relationships may provide useful metrics. The strong sensitivity to aerosol and ozone forcing suggests that although some air quality improvements may unmask greenhouse gas-induced changes in temperature, they have large benefits for reducing regional disruption of the hydrologic cycle.

Summary
Precipitation response to regional radiative forcing

Excerpt
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