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Coherent modulation of the sea-level annual cycle in the United States by Atlantic Rossby waves
Natl Oceanog Ctr, Joseph Proudman Bldg,6 Brownlow St, Liverpool L3 5DA, Merseyside, England.ORCID iD: 0000-0002-7474-135X
Univ Cent Florida, Natl Ctr Integrated Coastal Res, 12800 Pegasus Dr,Suite 211, Orlando, FL 32816 USA;Univ Cent Florida, Dept Civil Environm & Construct Engn, USA.
Uppsala universitet, Reglerteknik, Sweden.
Natl Oceanog Ctr, England.
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2018 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, article id 2571Article in journal (Refereed) Published
Abstract [en]

Changes in the sea-level annual cycle (SLAC) can have profound impacts on coastal areas, including increased flooding risk and ecosystem alteration, yet little is known about the magnitude and drivers of such changes. Here we show, using novel Bayesian methods, that there are significant decadal fluctuations in the amplitude of the SLAC along the United States Gulf and Southeast coasts, including an extreme event in 2008-2009 that is likely (probability = 68%) unprecedented in the tide-gauge record. Such fluctuations are coherent along the coast but decoupled from deep-ocean changes. Through the use of numerical and analytical ocean models, we show that the primary driver of these fluctuations involves incident Rossby waves that generate fast western-boundary waves. These Rossby waves project onto the basin-wide upper mid-ocean transport (top 1000 m) leading to a link with the SLAC, wherein larger SLAC amplitudes coincide with enhanced transport variability.

Place, publisher, year, edition, pages
Nature Publishing Group , 2018. Vol. 9, article id 2571
National Category
Oceanography, Hydrology and Water Resources
Identifiers
URN: urn:nbn:se:liu:diva-159804DOI: 10.1038/s41467-018-04898-yISI: 000437101700001PubMedID: 29968703OAI: oai:DiVA.org:liu-159804DiVA, id: diva2:1344811
Funder
Swedish Research Council, 2016-04278Swedish Foundation for Strategic Research , ICA16-0015
Note

Correction in: Nature Communications, vol. 9, Article number: 4312, 2018.

DOI: 10.1038/s41467-018-06852-4

Available from: 2019-08-22 Created: 2019-08-22 Last updated: 2019-08-23

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