Journal
JOURNAL OF CLIMATE
Volume 18, Issue 12, Pages 1853-1860Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI3460.1
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In this study, a mechanism is demonstrated whereby a large reduction in the Atlantic thermohaline circulation (THC) can induce global-scale changes in the Tropics that are consistent with paleoevidence of the global synchronization of millennial-scale abrupt climate change. Using GFDL's newly developed global coupled ocean-atmosphere model (CM2.0), the global response to a sustained addition of freshwater to the model's North Atlantic is simulated. This freshwater forcing substantially weakens the Atlantic THC, resulting in a southward shift of the intertropical convergence zone over the Atlantic and Pacific, an El Nino-like pattern in the southeastern tropical Pacific, and weakened Indian and Asian summer monsoons through air-sea interactions.
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