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Impact of the Atlantic meridional overturning circulation on the decadal variability of the Gulf Stream path and regional chlorophyll and nutrient concentrations

Sanchez-Franks, A.; Zhang, R.. 2015 Impact of the Atlantic meridional overturning circulation on the decadal variability of the Gulf Stream path and regional chlorophyll and nutrient concentrations. Geophysical Research Letters, 42 (22). 9889-9887. 10.1002/2015GL066262

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AGU Publisher statement: An edited version of this paper was published by AGU. © 2015 American Geophysical Union. Further reproduction or electronic distribution is not permitted. doi:10.1002/2015GL066262
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Abstract/Summary

In this study, we show that the underlying physical driver for the decadal variability in the Gulf Stream (GS) path and the regional biogeochemical cycling is linked to the low frequency variability in the Atlantic meridional overturning circulation (AMOC). There is a significant anticorrelation between AMOC variations and the meridional shifts of the GS path at decadal time scale in both observations and two Earth system models (ESMs). The chlorophyll and nutrient concentrations in the GS region are found significantly correlated with the AMOC fingerprint and anticorrelated with the GS path at decadal time scale through coherent isopycnal changes in the GS front in the ESMs. Our results illustrate how changes in the large-scale ocean circulation, such as AMOC, are teleconnected with regional decadal physical and biogeochemical variations near the North American east coast. Such linkages are useful for predicting future physical and biogeochemical variations in this region.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/2015GL066262
ISSN: 00948276
Additional Keywords: Gulf Stream; AMOC; biogeochemical cycle
NORA Subject Terms: Marine Sciences
Date made live: 28 Jan 2016 11:34 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/512772

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