Eddies in the Western Mediterranean seen in thermal infrared imagery and SLA fields

Image segmentation; Location; Surface waters; Anticyclonic eddies; Region of interest; Sea level anomaly; Sea surface temperature (SST); Thermal infrared imagery; Two dimensional model; Western Mediterranean; Western Mediterranean Sea; Sea level; Mediterranean Sea; Mediterranean Sea (West)

Abstract :

[en] In this article, daily fields of sea surface temperature (SST) and sea level anomaly (SLA) of the Western Mediterranean Sea obtained in 2011–2013 are being co-analysed. The study is aimed at assessing potentials of the fields of SLA for manifestation of mesoscale eddies in the region of interest. First, the SST imagery was inspected visually and locations of mesoscale eddies noticed in the images were detected. After that, closed contours were extracted in the fields of SLA and their locations were compared with locations of eddies directly seen in the SST images. Such a comparison showed that among anticyclonic eddies found in SST, about 56.3% had corresponding closed contours of SLA; the percentage was increasing with increasing eddy diameter. For cyclonic eddies, supposedly due to their smaller spatial and time scales, such percentage was only about 20.2%. During the warm season, when the mixed layer is particularly shallow and the turbulence is closer to the two-dimensional model, the correspondence between eddies seen in SST and closed contours of SLA was higher than during the cold period. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

Disciplines :

Earth sciences & physical geography

Author, co-author :

Karimova, Svetlana ; Université de Liège - ULg

Language :

English

Title :

Eddies in the Western Mediterranean seen in thermal infrared imagery and SLA fields

Publication date :

2018

Journal title :

International Journal of Remote Sensing

ISSN :

0143-1161

eISSN :

1366-5901

Publisher :

Taylor & Francis, United Kingdom

Volume :

Issue :

Pages :

4304-4329

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 10 December 2021

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