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- Title
Response to CO<sub>2</sub> Doubling of the Atlantic Hurricane Main Development Region in a High-Resolution Climate Model.
- Authors
DOI, TAKESHI; VECCHI, GABRIEL A.; ROSATI, ANTHONY J.; DELWORTH, THOMAS L.
- Abstract
Response of climate conditions in the Atlantic hurricane main development region (MDR) to doubling of atmospheric CO2 has been explored using the new high-resolution coupled climate model, version 2.5 (CM2.5), developed at the Geophysical Fluid Dynamics Laboratory (GFDL). In the annual mean, the SST in the MDR warms by about 2°C in the CO2 doubling run relative to the control run; the trade winds become weaker in the northern tropical Atlantic and the rainfall increases over the ITCZ and its northern region. The amplitude of the annual cycle of the SST over the MDR is not significantly changed by CO2 doubling. However, the authors find that the interannual variations show significant responses to CO2 doubling; the seasonal macimum peak of the interannual variations of the SST over the MDR is about 25% stronger than in the control run. The enhancement of the interannual variations of the SST in the MDR is caused by changes in effectiveness of the wind-evaporation-SST (WES) positive feedback; WES remains a positive feedback until boreal early sum- mer in the CO2 doubling run. The enhancement of the interannual variability of the SST over the MDR in boreal early summer due to CO2 doubling could lead to serious damages associated with the Atlantic hurricane count and drought (or flood) in the Sahel and South America in a future climate.
- Subjects
HURRICANES; CARBON dioxide; ATMOSPHERIC models; GEOPHYSICAL Fluid Dynamics Laboratory (U.S.); ELECTRONIC feedback
- Publication
Journal of Climate, 2013, Vol 26, Issue 12, p4322
- ISSN
0894-8755
- Publication type
Article
- DOI
10.1175/JCLI-D-12-00110.1