THERMOHALINE CIRCULATION AND DYNAMIC STRUCTURE OF THE NORTH

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THERMOHALINE CIRCULATION AND DYNAMIC STRUCTURE OF THE NORTH AEGEAN Dimitris GEORGOPOULOS National Centre for

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

GEOMORFOLOGY EXISTING DATA 1908 -1984 1985 -1999

GEOMORFOLOGY EXISTING DATA 1908 -1984 1985 -1999

METEOROLOGICAL CONDITIONS • The prevailing winds are northerlies • The secondary peak in frequency

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

ETESIAN WINDS NOAA-AVHRR 31 -8 -87 Visible

ETESIAN WINDS NOAA-AVHRR 31 -8 -87 Visible

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

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

WATER MASSES • Black Sea Water (BSW) • Old BSW • Levantine Surface Water

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

The distribution of BSW and LSW • BSW occupies the northern and western parts

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

SEASONAL EVOLUTION OF BSW * *

SEASONAL EVOLUTION OF BSW * *

BSW Seasonal varibility of the BSW at station in the Limnos basin. The net

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

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

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

SEASONAL CHANGES OF THE WATER COLUMN *

SEASONAL CHANGES OF THE WATER COLUMN *

DISTRIBUTION OF LIW AUGUST-SEPTEMBER 1986

DISTRIBUTION OF LIW AUGUST-SEPTEMBER 1986

DISTRIBUTION OF LIW AUGUST-SEPTEMBER 1987

DISTRIBUTION OF LIW AUGUST-SEPTEMBER 1987

DEEP AND BOTTOM WATER OF THE N. AEGEAN * Mean minimum temperature during the

DEEP AND BOTTOM WATER OF THE N. AEGEAN * Mean minimum temperature during the last 48 years in Alexandroupolis meteo station -0. 1 1987

DEEP AND BOTTOM WATER IN DIFFERENT BASINS * *

DEEP AND BOTTOM WATER IN DIFFERENT BASINS * *

10 year changes in the N. Aegean The recent history of the Limnos Basin

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

10 year changes in the N. Aegean The recent history of the North Skyros

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

DEEP AND BOTTOM WATER IN DIFFERENT BASINS

DEEP AND BOTTOM WATER IN DIFFERENT BASINS

SOURCES OF DEEP WATER IN THE N. AEGEAN BSW ? NAe. W ? ?

SOURCES OF DEEP WATER IN THE N. AEGEAN BSW ? NAe. W ? ? ? NAe. W ? ? LIW LSW NAe. W

CONVEYOR BELT CONNECTING THE NORTH AND SOUTH AEGEAN και plateau Θερμαϊκού

CONVEYOR BELT CONNECTING THE NORTH AND SOUTH AEGEAN και plateau Θερμαϊκού

THE DYNAMIC STRUCTURE LIA-3 August 86 LIA-5 March 87 MAIN DYNAMIC FEATURES • Cyclone

THE DYNAMIC STRUCTURE LIA-3 August 86 LIA-5 March 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 LIA-4 November 86 LIA-6 August 87