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Atmospheric response to the North Pacific enabled by daily sea surface temperature variability
Author(s) -
Zhou Guidi,
Latif Mojib,
Greatbatch Richard J.,
Park Wonsun
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2015gl065356
Subject(s) - extratropical cyclone , climatology , pacific decadal oscillation , sea surface temperature , environmental science , atmosphere (unit) , climate model , atmospheric model , eddy , atmospheric circulation , atmospheric sciences , climate change , geology , oceanography , meteorology , geography , turbulence
Ocean‐atmosphere interactions play a key role in climate variability on a wide range of timescales from seasonal to decadal and longer. The extratropical oceans are thought to exert noticeable feedbacks on the atmosphere especially on decadal and longer timescales, yet the large‐scale atmospheric response to anomalous extratropical sea surface temperature (SST) is still under debate. Here we show, by means of dedicated high‐resolution atmospheric model experiments, that sufficient daily variability in the extratropical background SST needs to be resolved to force a statistically significant large‐scale atmospheric response to decadal North Pacific SST anomalies associated with the Pacific Decadal Oscillation, which is consistent with observations. The large‐scale response is mediated by atmospheric eddies. This implies that daily extratropical SST fluctuations must be simulated by the ocean components and resolved by the atmospheric components of global climate models to enable realistic simulation of decadal North Pacific sector climate variability.