Thermohaline circulation and dynamic structure of the north aegean
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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

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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


Seasonal evolution of bsw

SEASONAL EVOLUTION OF BSW

*

*


Thermohaline circulation and dynamic structure of the north aegean

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

*


Thermohaline circulation and dynamic structure of the north aegean

LIA-4

Nov.-86

LIA-5

Mar.-87

LSW

LIA-6

Aug.-87

LIA-3

Sept.-86


Seasonal changes of the water column

SEASONAL CHANGES OF THE WATER COLUMN

*


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


Deep and bottom water in different basins

DEEP AND BOTTOM WATER IN DIFFERENT BASINS

*

*


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


Deep and bottom water in different basins1

DEEP AND BOTTOM WATER IN DIFFERENT BASINS


Thermohaline circulation and dynamic structure of the north aegean

SOURCES OF DEEP WATER IN THE N. AEGEAN

BSW

?

NAeW

?

?

?

NAeW

?

LIW

?

LSW

NAeW


Thermohaline circulation and dynamic structure of the north aegean

CONVEYOR BELT CONNECTING THE NORTH AND SOUTH AEGEAN

και plateau

Θερμαϊκού


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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