Evolution of satellite derived mesoscale thermal patterns in the Black Sea

Sur, Halil İbrahim; Ilyin, Y.P.

doi:10.1016/s0079-6611(97)00009-8

Cited by 42 publications

(18 citation statements)

References 8 publications

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“…These results are consistent with recent observations which show, both in satellite imagery and in situ surveys, that the Rim Current is often accompanied by a series of localised recurrent nearshore anticyclones (Zatsepin et al 2003). Most of these eddies are not steady but move cyclonically around the basin of the Black Sea with the large-scale circulation and interact actively with the current jet and adjacent eddies (Sur et al 1997;Ginzburg et al2002).…”

Section: Resultssupporting

confidence: 92%

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Hydrodynamic modelling of mesoscale eddies in the Black Sea

et al. 2005

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A three dimensional structure of mesoscale circulation in the Black Sea is simulated using the Proudman Oceanographic Laboratory Coastal Ocean Modelling System. A number of sensitivity tests reveal the response of the model to changes in the horizontal resolution, time steps, and diffusion coefficients. Three numerical grids are examined with x-fine (3.2 km), fine (6.7 km) and coarse (25 km) resolution. It is found that the coarse grid significantly overestimates the energy of the currents and is not adequate even for the study of basin-scale circulation. The x-fine grid, on the other hand, does not give significant advantages compared to the fine grid, and the latter is used for the bulk of simulations. The most adequate parameters are chosen from the sensitivity study and used to model both the basin-scale circulation and day-to-day variability of mesoscale currents for the months of May and June of 2000. The model is forced with actual wind data every 6 h and monthly climatic data for evaporation, precipitation, heat fluxes and river run-off. The results of the fine grid model are compared favourably against the satellite imagery. The model adequately reproduces the general circulation and many mesoscale features including cyclonic and anticyclonic eddies, jets and filaments in different parts of the Black Sea. The model gives a realistic geographical distribution and parameters of mesoscale currents, such as size, shape and evolution of the eddies.

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Section: Resultssupporting

confidence: 92%

“…The evidence is supported by satellite data analysis of Sea Surface Temperature (Sur and Ilyin 1997;Ginzburg et al 2000;Zatsepin et al 2002) and chlorophyll (e.g. Vostokov et al 2002), results of quasi-synoptic surveys (e.g.…”

Section: Introductionmentioning

confidence: 82%

Hydrodynamic modelling of mesoscale eddies in the Black Sea

et al. 2005

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“…The T 5 decreased abruptly at K0 in July 1998 and in June 2003. In July 1998, cold water patches were found in the vicinity of the strait (Altıok et al, 2012) as the anticyclonic eddy formations caused an increase in the CIW at the Black Sea exit (Sur et al, 1997). A similar feature was observed in June 2003.…”

Section: Upper Layer Temperature and Salinitymentioning

confidence: 86%

Seasonal and Interannual Variability of Water Exchange in the Strait of Istanbul

Altiok

Kayişoğlu

2015

Medit. Mar. Sci.

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Temperature and salinity distribution and volume fluxes through the Strait of Istanbul were analyzed using the long-term monthly time series of temperature-salinity (1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010) and current profiles (1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010), collected from both ends of the strait. While the annual cycle of the upper layer temperature, with the minima in February and maxima in August, reflects the influence of air temperature with a near monthly phase shift, the annual cycle of the upper layer salinity, with the lowest values observed between April and September is mostly affected by the river discharge into the Western Black Sea.

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“…As the long-lived anticyclonic mesoscale eddies are an ubiquitous feature of the Black Sea circulation [Sur and Ilyin, 1997;Ginzburg et al, 2002aGinzburg et al, , 2002bKarabashev et al, 2006;Stanev and Kandilarov, 2012], one could expect that the eddy-induced transport plays a significant role in shaping the properties of the shelf waters in the Black Sea in general and is not specific to the year 2005.…”

Section: Discussionmentioning

confidence: 99%

Cross-shelf exchange in the northwestern Black Sea

Zhou

Shapiro

Wobus

2014

J. Geophys. Res. Oceans

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The transports of water, heat, and salt between the northwestern shelf and deep interior of the Black Sea are investigated using a high-resolution three-dimensional primitive equation model. From April to August 2005, both onshore and offshore cross-shelf break transports in the top 20 m were 0.24 Sv on average, which is equivalent to the replacement of 60% of the volume of surface shelf waters (0-20 m) per month. Two main exchange mechanisms are studied: Ekman transport, and transport by mesoscale eddies and associated meanders of the Rim Current. The Ekman drift causes nearly uniform onshore or offshore flow over a large section of the shelf break, but it is confined to the upper layers. In contrast, eddies and meanders penetrate deep down to the bottom, but they are restricted laterally. During the strong wind events of 15-22 April and 1-4 July, some 0.66 3 10 12 and 0.44 3 10 12 m 3 of water were removed from the northwestern shelf, respectively. In comparison, the single long-lived Sevastopol Eddy generated a much larger offshore transfer of 2.84 3 10 12 m 3 over the period 23 April to 30 June, which is equivalent to 102% of the volume of northwestern shelf waters. Over the study period, salt exchanges increased the average density of the shelf waters by 0.67 kg m 23 and reduced the density contrast between the shelf and deep sea, while lateral heat exchanges reduced the density of the shelf waters by 0.16 kg m 23 and sharpened the shelf break front.

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Evolution of satellite derived mesoscale thermal patterns in the Black Sea

Cited by 42 publications

References 8 publications

Hydrodynamic modelling of mesoscale eddies in the Black Sea

Hydrodynamic modelling of mesoscale eddies in the Black Sea

Seasonal and Interannual Variability of Water Exchange in the Strait of Istanbul

Cross-shelf exchange in the northwestern Black Sea

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