1. Project: ENVIR.LG.961007
2. Title: The Role of Water Mass Formation and Transport Processes on the Health of the Caspian Sea
3. Participants:
- Prof. Ozsoy E., IMS METU, Turkey
- Prof. Sur H. I., Institute of Marine Science and Administration, Istanbul University, Turkey
- Dr. Ibrayev R., Institute of Numerical Mathematics, RAS, Russia
- Dr. Schrum C., Center of Marine and Climate Research, Institute of Oceanography, Hamburg
- Acad. Sarkisyan A., Institute of Numerical Mathematics, RAS, Russia
4. Co-directors:
- Prof. Emin Ozsoy
Institute of Marine Sciences, Middle East Technical University
P. O. Box 28
TR 33731 Erdemli-Içel, Turkey
Tel : (90) 324 521 24 06
Fax : (90) 324 521 23 27
E-mail: ozsoy@ims.metu.edu.tr, ozsoy@metu.edu.tr
Web:http://www.ims.metu.edu.tr/cv/ozweb/emin.html
- Dr. Rashit Ibrayev
Institute of Numerical Mathematics
Russian Academy of Sciences
8, Gubkin St. Moscow
117951 GSP-1 Russia
Tel: 7 095 938 3900
Fax: 7 095 938 1821
e-mail: ibrayev@inm.ras.ru
5. Status: completed
6. Period (start/end): 1997-2000.
7. Objectives:
To describe and understand the circulation of the Caspian Sea with particular emphasis on seasonal variability and deep water formation processes.
8. Results:
Two versions of three-dimensional primitive equation models of the Caspian Sea with sub-models for sea ice thermodynamics and air-sea interaction are developed. The model is first used to study seasonal circulation without incorporating density effects, to reveal peripheral coastal current systems, surface wind-drift, and upwelling features. The model is then used to study the seasonal baroclinic circulation and mixing characteristics of the sea under the influence of realistic surface and lateral fluxes of mass, momentum and heat, computed interactively using model sea-surface temperature, atmospheric variables computed from the boundary layer sub-model and ECMWF / ERA (1979-1994) 15-year atmospheric re-analysis data. The features of ice-formation in the northern Caspian, boundary currents, convection, eddy generation, and sea level change in response to water budgets are analysed and described.
9.Publications:
1. Ibrayev R.A., Ozsoy E. , Sarkisyan A.S., Sur H.I. Seasonal Variability of the Caspian Sea Circulation Driven by Climatic Wind Stress and River Discharge, J. Phys. Oceanogr. (2001). (in press).
2. Ibrayev, R.A., Ozsoy E., Schrum C., Sarkisyan A.S., Sur H.I. Seasonal Variability of the Caspian Sea Circulation, Part II: Three-Dimensional Circulation and Air-Sea Interaction (2001) (in preparation).
3. Schrum C., Ibrayev R., and Ozsoy E. On the Sensitivity of Caspian Sea Mean Sea Level - A numerical study with the 3-d model HAMSOM (2000) (in preparation).
4. Sur H.I., Ozsoy E., Ibrayev R.A. Satellite - Derived Flow Characteristcs of the Caspian Sea, in: D. Halpern (editor), Satellites, Oceanography and Society, Elsevier Oceanography Series, 63, Elsevier, 376 pp. (2000).
5. Ibraev R.A., Ozsoy E., Sarkisyan A.S., Sur H.I. Seasonal Variability of the Caspian Sea Dynamics: Barotropic Motions Driven by Climatic Wind Stress and River Discharge, in {\it Oceanic Fronts and Related Phenomena}, Proceedings of the Konstantin Fedorov International Memorial Symposium, St. Petersburg, International Oceanographic Commission Workshop Report No. 159, UNESCO, pp. 212-217 (1999).