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Variability in the slope water and its relation to the Gulf Stream path

journal contribution
posted on 2023-05-17, 06:55 authored by Beatriz Pena-MolinoBeatriz Pena-Molino, Joyce, TM
Sea surface temperature (SST) and sea surface height (SSH) data for 1993-2007 for the North Atlantic are combined with hydrographic data at 69 W to investigate the relation between the Gulf Stream (GS) position and the Slope Water properties. SST anomalies north of the GS are correlated with changes in its path. The lag of this correlation is such that positive temperature anomalies precede northward shifts of the GS, and suggests that SST anomalies move westward with speeds of several cm/s. EOF analysis of the SST and SSH fields shows that cooling and strengthening of the SW flow are in phase over the Slope Water, which is mirrored in the vertical structure of these fields at 69 W, indicating larger transports in the deep western boundary current lead to southward shifts of the mean GS path. This relation between the slope water and the GS path provides some predictability for the latter.

History

Publication title

Geophysical Research Letters

Volume

35

Article number

L03606

Number

L03606

Pagination

1-5

ISSN

0094-8276

Department/School

Institute for Marine and Antarctic Studies

Publisher

Amer Geophysical Union

Place of publication

2000 Florida Ave Nw, Washington, USA, Dc, 20009

Rights statement

Copyright 2008 American Geophysical Union

Repository Status

  • Restricted

Socio-economic Objectives

Oceanic processes (excl. in the Antarctic and Southern Ocean)

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