Khatri, Hemant 
ORCID: 0000-0001-6559-9059, Williams, Richard G ORCID: 0000-0002-3180-7558, Woollings, Tim and Smith, Doug M
(2022)
Fast and Slow Subpolar Ocean Responses to the North Atlantic Oscillation: Thermal and Dynamical Changes.
GEOPHYSICAL RESEARCH LETTERS, 49 (24).
Abstract
<jats:title>Abstract</jats:title><jats:p>Climate model hindcasts are analyzed to reveal the impacts of the North Atlantic Oscillation (NAO) on the North Atlantic subpolar ocean, which exhibits variability on seasonal to decadal timescales. The ocean response to a single winter NAO event is separated into fast and slow responses. The fast response persists over winter–spring seasons, during which wind stress and heat flux anomalies associated with the NAO rapidly modify ocean temperatures via changes in Ekman transport and ocean‐atmosphere heat exchanges. The slow response persists for 3–4 years, during which overturning and gyre circulations redistribute opposing‐signed surface temperature anomalies created by the NAO. This redistribution modifies east‐west temperature contrasts altering the meridional heat transport associated with gyres and changing the strength of the overturning circulation. Hence, the fast and slow responses lead to opposing‐signed subpolar temperature anomalies in time from the competing effects of local forcing and horizontal heat convergence.</jats:p>
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | North Atlantic meridional overturning, North Atlantic Oscillation, ocean response timescales |
| Divisions: | Faculty of Science and Engineering > School of Environmental Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 08 Mar 2023 09:59 |
| Last Modified: | 21 Aug 2023 02:39 |
| DOI: | 10.1029/2022GL101480 |
| Open Access URL: | https://doi.org/10.1029/2022GL101480 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3168848 |
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