Convection in the Black Sea during cold winters

Date

2001-11-01

Author

Ivanov, LI
Backhaus, JO
Ozsoy, E
Wehde, H

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

81
views

0
downloads

We investigate the effects of initial conditions and atmospheric forcing on the penetration depth of winter convection in the strongly stratified environment of the Black Sea. The amount of Cold Intermediate Water (CIW) formed annually in the Black Sea, and the amount entrained into the euphotic zone from below, largely depend on the convective activity in the cold season. Seasonal thermohaline evolution of the mixed layer has been simulated using a one-dimensional mixed layer model driven by the ECMWF meteorological data, and initial conditions based on hydrographic data collected in the northwestern Black Sea in autumn. Simulations have been carried out for three different regions with typical hydrological conditions. The results were compared with data obtained in the spring seasons of successive years. Convection events, primarily responsible for the replenishment of the CIW, are shown to last for several days and coinciding with severe storms. The model results suggest that inhomogeneities in the CIW density and thickness could be a consequence of initial stratification in different parts of the Black Sea. In all of our experiments, convection had limited effect in modifying thermal and density structure of the main pycnocline.

Subject Keywords

Black Sea, Air-sea interaction, Mixing processes, Oceanic convection, Pycnocline erosion

URI

https://hdl.handle.net/11511/67731

Journal

JOURNAL OF MARINE SYSTEMS

DOI

https://doi.org/10.1016/s0924-7963(01)00047-1

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Air-sea exchange in the Black Sea estimated from atmospheric analysis for the period 1979-1993 Schrum, C; Staneva, J; Stanev, E; Ozsoy, E (2001-11-01) The air-sea exchange in the Black Sea is revisited in the paper on the base of data provided from the ECMWF atmospheric re-analysis for the period 1979-1993. Climatological characteristics of analysis data are compared against available climatic data, demonstrating quite a good consistency. Several drawbacks are found: too low temperatures in the easternmost part of the sea, too low dew point temperature and slight underestimation of precipitation. However, the seasonal and inter-annual oscillations are res...
Principal component and time series analysis of air-sea interactions in the "seas of the old world" Gündüz, Murat; Özsoy, Emin; Graduate School of Marine Sciences (2002) Climate data on surface atmospheric variables, sea surface temperature and computed air-sea fluxes are analysed to describe comparative surface climatolo gies of the 'Seas of the Old World' (Black, Caspian and Mediterranean Seas) and to investigate their interannual and interdecadal variability. Based on these analyses, differences and similarities between climates of these basins and their relationships to other global systems are identified. Empirical Orthogonal Function (EOF) Analysis is used to study sp...
Seasonal Changes in the Composition and Abundance ofZooplankton in the Seas of the Mediterranean Basin Kovalev, Av; Mazzocchı, Mg; Toklu Alıçlı, Benin; Skryabın, Va; Kıdeyş, Ahmet Erkan (2003-01-01) Seasonal changes in the composition, abundance and biomass of zooplankton in the seas of the Mediterranean basin (the Mediterranean, Black and Azov seas) have been reviewed using our own data and data from the literature. In the deep-water central regions of the seas, the seasonal cycle of zooplankton abundance is characterised by one maximum occurring in spring or summer. In the coastal regions, two to three peaks (spring, summer and autumn) exist for the zooplankton abundance. The amplitude of seasonal fl...
Ventilation of deep waters in the Adriatic and Ionian Seas following changes in thermohaline circulation of the Eastern Mediterranean Manca, Beniamino B.; Ibello, Valeria; Pacciaroni, Massimo; Scarazzato, Paolo; Giorgetti, Alessandra (2006-07-27) Hydrographic measurements obtained in March-April 2002 indicate a new ventilation of the deep layers in the Adriatic and Ionian Seas, following abrupt changes in the thermohaline circulation of the eastern Mediterranean observed since the beginning of the last decade. The water masses that reside in the Southern Adriatic basin were renewed by open ocean winter convection of water with potential density excess (sigma(theta)) > 29.18 kg m(-3) at depths 600 to 800 m and by a vein of still denser (29.26 kg m(-3...
Chemical composition of Eastern Black Sea aerosol-Preliminary results BALCILAR, İLKER; Zararsız, Abdullah; Kalaycı, Yusuf; DOĞAN, GÜRAY; Tuncel, Süleyman Gürdal (2014-08-01) Trace element composition of atmospheric particles collected at a high altitude site on the Eastern Black Sea coast of Turkey was investigated to understand atmospheric transport of pollutants to this semi-closed basin. Aerosol samples were collected at a timber-storage area, which is operated by the General Directorate of Forestry. The site is situated at a rural area and is approximately 50 km to the Black Sea coast and 200 km to the Georgia border of Turkey. Coarse (PM2.5-10) and fine (PM2.5) aerosol sam...

Citation Formats

L. Ivanov, J. Backhaus, E. Ozsoy, and H. Wehde, “Convection in the Black Sea during cold winters,” JOURNAL OF MARINE SYSTEMS, pp. 65–76, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67731.