Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability
The Gulf Stream plays an important role in North Atlantic climate variability on a range of timescales. The North Atlantic is notable for large decadal variability in sea surface temperatures (SST). Whether this variability is driven by atmospheric or oceanic influences is a disputed point. Long tim...
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ftunivmaynooth:oai:mural.maynoothuniversity.ie:12177 2024-04-28T08:29:42+00:00 Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability McCarthy, Gerard Joyce, Terrence M. Josey, Simon A. 2018-09-21 text https://mural.maynoothuniversity.ie/12177/ https://mural.maynoothuniversity.ie/12177/1/McCarty_GUlf_2018.pdf en eng American Geophysical Union https://mural.maynoothuniversity.ie/12177/1/McCarty_GUlf_2018.pdf McCarthy, Gerard and Joyce, Terrence M. and Josey, Simon A. (2018) Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability. Geophysical Research Letters, 45 (20). 11,257-11,264. ISSN 0094-8276 Article PeerReviewed 2018 ftunivmaynooth 2024-04-09T23:30:38Z The Gulf Stream plays an important role in North Atlantic climate variability on a range of timescales. The North Atlantic is notable for large decadal variability in sea surface temperatures (SST). Whether this variability is driven by atmospheric or oceanic influences is a disputed point. Long time series of atmospheric and ocean variables, in particular long time series of Gulf Stream position, reveal differing sources of SST variability on quasi‐decadal and multidecadal timescales. On quasi‐decadal timescales, an oscillatory signal identified in the North Atlantic Oscillation (NAO) controls SST evolution directly via air‐sea heat fluxes. However, on multidecadal timescales, this relationship between the NAO and SST changes, while the relationship between the NAO and Gulf Stream position remains consistent in phase and resonant in amplitude. Recent changes in the Gulf Stream Extension show a weakening and broadening of the current, consistent with increased instability. We consider these changes in the context of a weakening Atlantic overturning circulation. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Maynooth University ePrints and eTheses Archive (National University of Ireland) |
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Maynooth University ePrints and eTheses Archive (National University of Ireland) |
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ftunivmaynooth |
language |
English |
description |
The Gulf Stream plays an important role in North Atlantic climate variability on a range of timescales. The North Atlantic is notable for large decadal variability in sea surface temperatures (SST). Whether this variability is driven by atmospheric or oceanic influences is a disputed point. Long time series of atmospheric and ocean variables, in particular long time series of Gulf Stream position, reveal differing sources of SST variability on quasi‐decadal and multidecadal timescales. On quasi‐decadal timescales, an oscillatory signal identified in the North Atlantic Oscillation (NAO) controls SST evolution directly via air‐sea heat fluxes. However, on multidecadal timescales, this relationship between the NAO and SST changes, while the relationship between the NAO and Gulf Stream position remains consistent in phase and resonant in amplitude. Recent changes in the Gulf Stream Extension show a weakening and broadening of the current, consistent with increased instability. We consider these changes in the context of a weakening Atlantic overturning circulation. |
format |
Article in Journal/Newspaper |
author |
McCarthy, Gerard Joyce, Terrence M. Josey, Simon A. |
spellingShingle |
McCarthy, Gerard Joyce, Terrence M. Josey, Simon A. Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability |
author_facet |
McCarthy, Gerard Joyce, Terrence M. Josey, Simon A. |
author_sort |
McCarthy, Gerard |
title |
Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability |
title_short |
Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability |
title_full |
Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability |
title_fullStr |
Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability |
title_full_unstemmed |
Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability |
title_sort |
gulf stream variability in the context of quasi‐decadal and multidecadal atlantic climate variability |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://mural.maynoothuniversity.ie/12177/ https://mural.maynoothuniversity.ie/12177/1/McCarty_GUlf_2018.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://mural.maynoothuniversity.ie/12177/1/McCarty_GUlf_2018.pdf McCarthy, Gerard and Joyce, Terrence M. and Josey, Simon A. (2018) Gulf Stream Variability in the Context of Quasi‐Decadal and Multidecadal Atlantic Climate Variability. Geophysical Research Letters, 45 (20). 11,257-11,264. ISSN 0094-8276 |
_version_ |
1797587817764749312 |