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Rhodes - 8 to 11 October 2002 THERMOHALINE CIRCULATION AND DYNAMIC STRUCTURE OF THE NORTH AEGEAN Dimitris GEORGOPOULOS National Centre for Marine Research.

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Presentation on theme: "Rhodes - 8 to 11 October 2002 THERMOHALINE CIRCULATION AND DYNAMIC STRUCTURE OF THE NORTH AEGEAN Dimitris GEORGOPOULOS National Centre for Marine Research."— Presentation transcript:

1 Rhodes - 8 to 11 October 2002 THERMOHALINE CIRCULATION AND DYNAMIC STRUCTURE OF THE NORTH AEGEAN Dimitris GEORGOPOULOS National Centre for Marine Research

2 GEOMORFOLOGY 1908-1984 1985-1999 EXISTING DATA

3 METEOROLOGICAL CONDITIONS The prevailing winds are northerlies The secondary peak in frequency are Southerlies

4 ETESIAN WINDS NOAA-AVHRR 31-8-87 Visible

5 UPEWLLINGS NOAA-AVHRR HRPT of 4-9-1987 Summer wind stress distribution in the Mediterrenean

6 WATER MASSES Black Sea Water (BSW) Old BSW Levantine Surface Water (LSW) Levantine Intermediate Water (LIW) Deep and Bottom Water (DW) * *

7 The distribution of BSW and LSW BSW occupies the northern and western parts of the N. Aegean The LSW occupies the eastern part of the Aegean up to the Limnos Plateau BSW LSW

8 SEASONAL EVOLUTION OF BSW * *

9 BSW Seasonal varibility of the BSW at station in the Limnos basin. * The net exchange through Dardanelles fluctuates from 200km 3 /yr to 1000km 3 /yr. The mean inflow in the AEGEAN is 1257km 3 /yr and outflow from the AEGEAN is 957km 3 /yr

10 LSW LIA-4 Nov.-86 LIA-3 Sept.-86 LIA-5 Mar.-87 LIA-6 Aug.-87

11 SEASONAL CHANGES OF THE WATER COLUMN *

12 DISTRIBUTION OF LIW AUGUST-SEPTEMBER 1986

13 DISTRIBUTION OF LIW AUGUST-SEPTEMBER 1987

14 DEEP AND BOTTOM WATER OF THE N. AEGEAN * -0.1 1987 Mean minimum temperature during the last 48 years in Alexandroupolis meteo station

15 DEEP AND BOTTOM WATER IN DIFFERENT BASINS * *

16 10 year changes in the N. Aegean The recent history of the Limnos Basin 1986 1987 - 1988 1993 1997

17 10 year changes in the N. Aegean The recent history of the North Skyros Basin 1986 1987 1988 1997

18 DEEP AND BOTTOM WATER IN DIFFERENT BASINS

19 ? ? ? ? ? LSW LIW NAeW BSW ? SOURCES OF DEEP WATER IN THE N. AEGEAN

20 και plateau Θερμαϊκού CONVEYOR BELT CONNECTING THE NORTH AND SOUTH AEGEAN

21 THE DYNAMIC STRUCTURE LIA-3 August 86 LIA-4 November 86 LIA-5 March 87 LIA-6 August 87 MAIN DYNAMIC FEATURES Cyclone of Chios basin Anticyclones along the periphery of the Chios Cyclone North Sporades Cyclone Samothraki Anticyclone Athos anticyclone Current of the Eastern Aegean Thermohaline front of Limnos Thermohaline fronts where BSW meet LSW/LIW Upwellings

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