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| Titel |
Subpolar Atlantic cooling and North American east coast warming linked to AMOC slowdown |
| VerfasserIn |
Stefan Rahmstorf, Levke Caesar, Georg Feulner, Vincent Saba |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142988
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| Publikation (Nr.) |
 EGU/EGU2017-6675.pdf |
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| Zusammenfassung |
| Reconstructing the history of the Atlantic Meridional Overturning Circulation (AMOC) is
difficult due to the limited availability of data. One approach has been to use instrumental and
proxy data for sea surface temperature (SST), taking multi-decadal and longer SST
variations in the subpolar gyre region as indicator for AMOC changes [Rahmstorf et al.,
2015].
Recent high-resolution global climate model results [Saba et al., 2016] as well as
dynamical theory and conceptual modelling [Zhang and Vallis, 2007] suggest that an AMOC
weakening will not only cool the subpolar Atlantic but simultaneously warm the Northwest
Atlantic between Cape Hatteras and Nova Scotia, thus providing a characteristic SST pattern
associated with AMOC variations.
We analyse sea surface temperature (SST) observations from this region together with
high-resolution climate model simulations to better understand the linkages of SST
variations to AMOC variability and to provide further evidence for an ongoing AMOC
slowdown.
References
Rahmstorf, S., J. E. Box, G. Feulner, M. E. Mann, A. Robinson, S. Rutherford, and E. J.
Schaffernicht (2015), Exceptional twentieth-century slowdown in Atlantic Ocean overturning
circulation, Nature Climate Change, 5(5), 475-480, doi: 10.1038/nclimate2554.
Saba, V. S., et al. (2016), Enhanced warming of the Northwest Atlantic Ocean under
climate change, Journal of Geophysical Research-Oceans, 121(1), 118-132, doi:
10.1002/2015JC011346.
Zhang, R., and G. K. Vallis (2007), The Role of Bottom Vortex Stretching on the Path of
the North Atlantic Western Boundary Current and on the Northern Recirculation Gyre,
Journal of Physical Oceanography, 37(8), 2053-2080, doi: 10.1175/jpo3102.1. |
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