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Rapid changes in the seasonal sea level cycle along the US Gulf coast from the late 20th century

Rapid changes in the seasonal sea level cycle along the US Gulf coast from the late 20th century
Rapid changes in the seasonal sea level cycle along the US Gulf coast from the late 20th century
Temporal variations of the seasonal sea level harmonics throughout the 20th and early 21st century along the United States Gulf coast are investigated. A significant amplification of the annual sea level cycle from the 1990s onward is found, with both lower winter and higher summer sea levels in the eastern Gulf. Ancillary data are used to build a set of multiple regression models to explore the mechanisms driving the decadal variability and recent increase in the annual cycle. The results suggest that changes in the air surface temperature toward warmer summers and colder winters and changes in mean sea level pressure explain most of the amplitude increase. The changes in the seasonal sea level cycle are shown to have almost doubled the risk of hurricane induced flooding associated with sea level rise since the 1990s for the eastern and north-eastern Gulf of Mexico coastlines.
0094-8276
491-498
Wahl, Thomas
6506794a-1f35-4803-b7f7-98702e57e667
Calafat, Francisco M.
f97617bd-0238-48e6-b693-7d409ac30c47
Luther, Mark E.
c2794873-cbc1-400a-bd74-9cd7aa06bba4
Wahl, Thomas
6506794a-1f35-4803-b7f7-98702e57e667
Calafat, Francisco M.
f97617bd-0238-48e6-b693-7d409ac30c47
Luther, Mark E.
c2794873-cbc1-400a-bd74-9cd7aa06bba4

Wahl, Thomas, Calafat, Francisco M. and Luther, Mark E. (2014) Rapid changes in the seasonal sea level cycle along the US Gulf coast from the late 20th century. Geophysical Research Letters, 41 (2), 491-498. (doi:10.1002/2013GL058777).

Record type: Article

Abstract

Temporal variations of the seasonal sea level harmonics throughout the 20th and early 21st century along the United States Gulf coast are investigated. A significant amplification of the annual sea level cycle from the 1990s onward is found, with both lower winter and higher summer sea levels in the eastern Gulf. Ancillary data are used to build a set of multiple regression models to explore the mechanisms driving the decadal variability and recent increase in the annual cycle. The results suggest that changes in the air surface temperature toward warmer summers and colder winters and changes in mean sea level pressure explain most of the amplitude increase. The changes in the seasonal sea level cycle are shown to have almost doubled the risk of hurricane induced flooding associated with sea level rise since the 1990s for the eastern and north-eastern Gulf of Mexico coastlines.

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Published date: 28 January 2014
Organisations: Energy & Climate Change Group, Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 362280
URI: http://eprints.soton.ac.uk/id/eprint/362280
ISSN: 0094-8276
PURE UUID: 4901ac15-333c-43fa-bc66-f4df00dbeebc

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Date deposited: 19 Feb 2014 11:07
Last modified: 14 Mar 2024 16:02

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Contributors

Author: Thomas Wahl
Author: Francisco M. Calafat
Author: Mark E. Luther

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