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Dynamical and cloud‐radiation feedbacks in El Niño and greenhouse warming

2001; American Geophysical Union; Volume: 28; Issue: 8 Linguagem: Inglês

10.1029/2000gl012078

1944-8007

Fei‐Fei Jin, Zeng‐Zhen Hu, Mojib Latif, Lars Bengtsson, E. Roeckner,

Marine and coastal ecosystems

An El Niño‐like steady response is found in a greenhouse warming simulation resulting from coupled ocean‐atmosphere dynamical feedbacks similar to those producing the present‐day El Niños. There is a strong negative cloud‐radiation feedback on the sea surface temperature (SST) anomaly associated with this enhanced eastern equatorial Pacific warm pattern. However, this negative feedback is overwhelmed by the positive dynamical feedbacks and cannot diminish the sensitivity of the tropical SST to enhanced greenhouse gas concentrations. The enhanced eastern‐Pacific warming in the coupled ocean‐atmosphere system suggests that coupled dynamics can strengthen this sensitivity.