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The role of air-sea interaction in the precipitation variability of the Southern Black Sea coast

Ozan Mert Göktürk Naki Akçar Dominik Fleitmann Institute of Geosciences, University of Bern. The role of air-sea interaction in the precipitation variability of the Southern Black Sea coast. Aim. To explain what 'air-sea interaction' is

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The role of air-sea interaction in the precipitation variability of the Southern Black Sea coast

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  1. Ozan Mert Göktürk Naki Akçar Dominik Fleitmann Institute of Geosciences, University of Bern The role of air-sea interaction in the precipitation variability of the Southern Black Sea coast

  2. 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 ?

  3. Low Air Temp + High Water Temp Sea / lake effect Precipitation

  4. Great Lakes of the North America • Sea of Japan • Black Sea ? • ...

  5. 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! Sea / lake effect Precipitation Low Air Temp + High Water Temp

  6. Fall + Winter, 1951-1990Correlations between air temperature and precipitation Temp - + Precip + Temp + Precip

  7. November, 1951-1990Correlations between air temperature and precipitation

  8. February, 1951-1990Correlations between temperature and precipitation

  9. January+February vs February, 1951-1990Correlations between temperature and precipitation + Sea Surface Temp Air Temp - + Precip

  10. 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.

  11. 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 ?

  12. Finally... Radar image, 27.09.2008 Sea Surface Temp anomaly 25.09.2008 Wind speed in Istanbul: 140 km / h (all-time record)‏

  13. Sea Surface Temp anomaly 06.09.2009 Istanbul, 09.09.2009 08.09.2009

  14. Thanks!

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