A nested model study of the Loop Current generated variability and its impact on the West Florida Shelf

Barth, Alexander; Alvera Azcarate, Aïda; Weisberg, R. H.

doi:10.1029/2007JC004492

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A nested model study of the Loop Current generated variability and its impact on the West Florida Shelf

Barth, Alexander; Alvera Azcarate, Aïda; Weisberg, R. H.

2008 • In Journal of Geophysical Research. Oceans, 113 (C5)

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https://hdl.handle.net/2268/26199

DOI
10.1029/2007JC004492

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Keywords :

coastal ocean model; vertical coordinate; temperature budget; system; circulation; surface; water; parametrization; implementation; assimilation

Abstract :

[en] A West Florida Shelf model based on the Regional Ocean Modeling System (ROMS) is nested in the North Atlantic Hybrid Coordinate Ocean Model (NAT HYCOM). The focus of this work is the study of the impact of the Loop Current on the West Florida Shelf. In order to assess the model's accuracy, it is compared quantitatively to in situ temperature and velocity measurements on the shelf. A series of sensitivity experiments are conducted to determine the appropriate wind forcing, sea surface temperature relaxation, and mixing scheme. By the inclusion of the Loop Current, we are able to study the propagation of an anticyclonic vortex detaching from the Loop Current. We found that the ambient gradient of potential vorticity is able to explain the vortex path and speed. The statistics of such Loop Current generated flow features were examined by including a tracer marking Loop Current water. This allows to track the Loop Current water on the West Florida Shelf and to quantify the amount of Loop Current water reaching the shelf.

Research Center/Unit :

Centre Interfacultaire de Recherches en Océanologie - MARE - GHER

Disciplines :

Earth sciences & physical geography

Author, co-author :

Barth, Alexander ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie physique

Alvera Azcarate, Aïda ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)

Weisberg, R. H.

Language :

English

Title :

A nested model study of the Loop Current generated variability and its impact on the West Florida Shelf

Publication date :

09 May 2008

Journal title :

Journal of Geophysical Research. Oceans

ISSN :

2169-9275

eISSN :

2169-9291

Publisher :

American Geophysical Union (AGU), Washington, United States - District of Columbia

Volume :

113

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 22 October 2009

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