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Authors: Scoccimarro, E.* 
Gualdi, S.* 
Villarini, G.* 
Vecchi, G. A.* 
Zhao, M.* 
Walsh, K.* 
Navarra, A.* 
Title: Intense precipitation events associated with landfalling tropical cyclones in response to a warmer climate and increased CO2
Issue Date: 2014
Series/Report no.: 12/27 (2014)
DOI: 10.1175/JCLI-D-14-00065.1
Keywords: tropical cyclones
extreme events
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.02. Climate 
Abstract: In this work the authors investigate possible changes in the intensity of rainfall events associated 28 with tropical cyclones (TCs) under idealized forcing scenarios, including a uniformly warmer climate, with a special focus on landfalling storms. A new set of experiments designed within the U.S. CLIVAR Hurricane Working Group allows disentangling the relative role of changes in atmospheric carbon dioxide from that played by sea surface temperature (SST) in changing the amount of precipitation associated with TCs in a warmer world. Compared to the present day simulation, we found an increase in TC precipitation under the scenarios involving SST increases. On the other hand, in a CO2 doubling-only scenario, the changes in TC rainfall are small and we found that, on average, TC rainfall tends to decrease compared to the present day climate. The results of this study highlight the contribution of landfalling TCs to the projected increase in the precipitation changes affecting the tropical coastal regions.
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