Spatial and temporal variations of Levantine Intermediate Water : with special focus on the M84/3 and POS414 cruises.

Essink, Sebastian (2012) Spatial and temporal variations of Levantine Intermediate Water : with special focus on the M84/3 and POS414 cruises. (Bachelor thesis), Universität Hamburg, Hamburg, Germany, 59 pp.

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Abstract

The Levantine Intermediate Water (LIW) is a main contributor to the circulation system of the Mediterranean Sea. Climatological analyses of a historical data base have been carried out to resolve spatial and temporal variations of LIW. On seven horizontal boxes, corresponding to broad regions relevant to the LIW flow, seasonally and spatially averaged time series with a maximum length of 100 years have been produced. Spatially, the results reveal a continuous decline of salinity and temperature of the LIW layer from its formation site toward the Atlantic. A trend analysis over the period from 1945 to 2000 yields an increase in salinity in all observed boxes with an amplitude of 2.5 · 10-3 psu/year and a warming of the LIW layer in the Western Mediterranean basin. It is found that the most important mixing regions are the approaches to the Straits of Sicily and Gibraltar and the Gulf of Lion, where deep water formation occurs. An analysis of the data from the recent cruise METEOR M84/3 (2011) confirm the found spatial variability. The method used in this work is useful to depict the basic variations of the LIW properties in the Mediterranean basins. Due to the large heterogeneity of the data, however, large uncertainties in the trend determinantion cannot be excluded.

Document Type: Thesis (Bachelor thesis)
Thesis Advisor: Hainbucher, Dagmar and Quadfasel, Detlef
Additional Information: Die fehlenden Seiten 2,14,24,48 und 58 sind im Original leere Seiten
Keywords: M84/3; METEOR; POSEIDON; POS414
Open Access Journal?: No
Expeditions/Models/Experiments:
Date Deposited: 28 Sep 2015 08:38
Last Modified: 29 Jul 2019 07:21
URI: http://oceanrep.geomar.de/id/eprint/29815

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