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The role of air-sea interaction in the precipitation variability of the Southern Black Sea coast
Ozan Mert GöktürkNaki AkçarDominik Fleitmann
Institute of Geosciences, University of Bern
Aim
To explain what 'air-sea interaction' is To demonstrate the role of air-sea interaction
process in the present day precipitation variability of the southern Black Sea coast, by means of simple data analysis
Possible implications of this mechanism in the paleoclimate context ?
Low Air Temp + High Water Temp Sea / lake effect Precipitation
Great Lakes of the North America
Sea of Japan Black Sea ? ...
Sea / lake effect Precipitation
Hypothesis: The southern Black Sea area must be one of the “sea/lake effect” regions.
Test: Calculate correlations of temperature and sea surface temperature with precipitation!
Low Air Temp + High Water Temp
Fall + Winter, 1951-1990Correlations between air temperature and precipitation
TempPrecip
Temp -Precip +
++
November, 1951-1990 Correlations between air temperature and precipitation
February, 1951-1990Correlations between temperature and precipitation
January+February vs February, 1951-1990Correlations between temperature and precipitation
Air Temp -
Precip
Sea Surface Temp
+
+
Conclusion
Air - sea interaction is possibly the dominant precipitation generator for the Southern Black Sea coast
This process can be quite independent from the large scale climate, for example cyclone frequency, Arctic-North Atlantic oscillation etc.
Implications - Questions
Warm and wet ? Or, cold and wet ? Possible contrast between Mediterranean and
southern Black Sea areas, in terms of rainfall? Mountain glaciation mechanisms ?
Finally...
Sea Surface Temp anomaly 25.09.2008
Radar image, 27.09.2008
Wind speed in Istanbul: 140 km / h (all-time record)
Sea Surface Temp anomaly 06.09.2009
08.09.2009
Istanbul, 09.09.2009
Thanks!