Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/4588
Authors: | Bellucci, A.* Gualdi, S.* Scoccimarro, E.* Navarra, A.* |
Title: | NAO–ocean circulation interactions in a coupled general circulation model | Journal: | Climate Dynamics | Series/Report no.: | 7-8/31(2008) | Publisher: | SPRINGER | Issue Date: | Dec-2008 | DOI: | 10.1007/s00382-008-0408-4 | Keywords: | NAO Ocean Dynamics |
Subject Classification: | 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate | Abstract: | The interplay between the North Atlantic Oscillation and the large scale ocean circulation is inspected in a 20th century simulation conducted with a state-of-the-art coupled general circulation model. Significant lead-lag covariance between oceanic and tropospheric variables suggests that the system supports a damped oscillatory mode involving an active ocean-atmosphere coupling, with a typical NAO-like space structure and a 5 years timescale, qualitatively consistent with a mid-latitude delayed oscillator paradigm. The two essential processes governing the oscillation are 1) a negative feedback between ocean gyre circulation and the high latitude SST meridional gradient and 2) a positive feedback between SST and the NAO. The atmospheric NAO pattern appears to have a weaker projection on the ocean meridional overturning, compared to the gyre circulation, which leads to a secondary role for the thermohaline circulation in driving the meridional heat transport, and thus the oscillatory mode. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
bellucci08.pdf | 2.1 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
10
36
checked on Feb 10, 2021
Page view(s)
127
checked on Apr 17, 2024
Download(s)
27
checked on Apr 17, 2024