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THERMOHALINE CIRCULATION AND DYNAMIC STRUCTURE OF THE NORTH AEGEAN. Dimitris GEORGOPOULOS National Centre for Marine Research. EXISTING DATA. GEOMORFOLOGY. 1908-1984. 1985-1999. METEOROLOGICAL CONDITIONS. The prevailing winds are northerlies

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thermohaline circulation and dynamic structure of the north aegean

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

GEOMORFOLOGY

1908-1984

1985-1999

meteorological conditions
METEOROLOGICAL CONDITIONS
  • The prevailing winds are northerlies
  • The secondary peak in frequency are Southerlies
etesian winds
ETESIAN WINDS

NOAA-AVHRR

31-8-87

Visible

upewllings
UPEWLLINGS

NOAA-AVHRR

HRPT

of 4-9-1987

Summer wind stress distribution in the Mediterrenean

water masses
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
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

BSW

LSW

slide9
BSW

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

The net exchange through Dardanelles fluctuates from 200km3/yr to 1000km3/yr.

The mean inflow in the AEGEAN is 1257km3/yr and outflow from the AEGEAN is 957km3/yr

*

slide10

LIA-4

Nov.-86

LIA-5

Mar.-87

LSW

LIA-6

Aug.-87

LIA-3

Sept.-86

distribution of liw
DISTRIBUTION OF LIW

AUGUST-SEPTEMBER 1986

distribution of liw1
DISTRIBUTION OF LIW

AUGUST-SEPTEMBER

1987

deep and bottom water of the n aegean
DEEP AND BOTTOM WATEROF THE N. AEGEAN

*

Mean minimum temperature during the last 48 years in Alexandroupolis meteo station

-0.1

1987

10 year changes in the n aegean
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 aegean1
10 year changes in the N. Aegean

The recent history of the North Skyros Basin

1986

1987

1988

1997

slide19

SOURCES OF DEEP WATER IN THE N. AEGEAN

BSW

?

NAeW

?

?

?

NAeW

?

LIW

?

LSW

NAeW

the dynamic structure

LIA-5

March 87

THE DYNAMIC STRUCTURE

LIA-3

August 86

  • 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 meetLSW/LIW
  • Upwellings

LIA-4

November 86

LIA-6

August 87

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