Temporal variability of the Atlantic meridional overturning circulation at 26.5°N

Stuart A. Cunningham, Torsten Kanzow, Darren Rayner, Molly O. Baringer, William E Johns, Jochem Marotzke, Hannah R. Longworth, Elizabeth M. Grant, Joël J M Hirschi, Lisa Beal, Christopher S. Meinen, Harry L. Bryden

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Abstract

The vigor of Atlantic meridional overturning circulation (MOC) is thought to be vulnerable to global warming, but its short-term temporal variability is unknown so changes inferred from sparse observations on the decadal time scale of recent climate change are uncertain. We combine continuous measurements of the MOC (beginning in 2004) using the purposefully designed transatlantic Rapid Climate Change array of moored instruments deployed along 26.5°N, with time series of Gulf Stream transport and surface-layer Ekman transport to quantify its intra-annual variability. The year-long average overturning is 18.7 ± 5.6 sverdrups (Sv) (range: 4.0 to 34.9 Sv, where 1 Sv = a flow of ocean water of 106 cubic meters per second). Interannual changes in the overturning can be monitored with a resolution of 1.5 Sv.

Original languageEnglish (US)
Pages (from-to)935-938
Number of pages4
JournalScience
Volume317
Issue number5840
DOIs
StatePublished - Aug 17 2007

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Climate Change
Global Warming
Oceans and Seas
Water

ASJC Scopus subject areas

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Cunningham, S. A., Kanzow, T., Rayner, D., Baringer, M. O., Johns, W. E., Marotzke, J., ... Bryden, H. L. (2007). Temporal variability of the Atlantic meridional overturning circulation at 26.5°N. Science, 317(5840), 935-938. https://doi.org/10.1126/science.1141304

Temporal variability of the Atlantic meridional overturning circulation at 26.5°N. / Cunningham, Stuart A.; Kanzow, Torsten; Rayner, Darren; Baringer, Molly O.; Johns, William E; Marotzke, Jochem; Longworth, Hannah R.; Grant, Elizabeth M.; Hirschi, Joël J M; Beal, Lisa; Meinen, Christopher S.; Bryden, Harry L.

In: Science, Vol. 317, No. 5840, 17.08.2007, p. 935-938.

Research output: Contribution to journalArticle

Cunningham, SA, Kanzow, T, Rayner, D, Baringer, MO, Johns, WE, Marotzke, J, Longworth, HR, Grant, EM, Hirschi, JJM, Beal, L, Meinen, CS & Bryden, HL 2007, 'Temporal variability of the Atlantic meridional overturning circulation at 26.5°N', Science, vol. 317, no. 5840, pp. 935-938. https://doi.org/10.1126/science.1141304
Cunningham SA, Kanzow T, Rayner D, Baringer MO, Johns WE, Marotzke J et al. Temporal variability of the Atlantic meridional overturning circulation at 26.5°N. Science. 2007 Aug 17;317(5840):935-938. https://doi.org/10.1126/science.1141304
Cunningham, Stuart A. ; Kanzow, Torsten ; Rayner, Darren ; Baringer, Molly O. ; Johns, William E ; Marotzke, Jochem ; Longworth, Hannah R. ; Grant, Elizabeth M. ; Hirschi, Joël J M ; Beal, Lisa ; Meinen, Christopher S. ; Bryden, Harry L. / Temporal variability of the Atlantic meridional overturning circulation at 26.5°N. In: Science. 2007 ; Vol. 317, No. 5840. pp. 935-938.
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