Abstract
The contribution of the tropical sea surface temperature in the Arctic tropospheric warming during 1979–2013 was studied through simulations using the CAM6-Nor atmospheric general circulation model. Results showed that the tropical sea surface temperature explained about 30%–40% of the autumn warming and the January warming in the historical simulation. This implies that the tropical sea surface temperature could have been one of the main drivers of Arctic winter tropospheric warming between 1979 and 2013. The tropical sea surface temperature impacts generally came from a combination of the effects of the tropical central-eastern Pacific, the tropical Indo-western Pacific, and the tropical Atlantic, except for the January warming below 850 hPa, which was dominated by the tropical Indo-western Pacific impacts.
Published Version
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