DATE2016-08-19 18:33:47
IDABSTRACT20160819183347-1058
CONTACTyelizyilmaz@itu.edu.tr
PRESENTATIONPOSTER
INVITED0
IDSESSION1
TITLETHE ROLE OF ATMOSPHERE-OCEAN INTERACTION IN THE RELATIONSHIP BETWEEN SEA SURFACE CONDITIONS OF THE MEDITERRANEAN SEA AND REGIONAL CLIMATE OVER EUROPE
AUTHORSYeliz Yilmaz (1), Fulden Batibeniz (2), Ufuk Utku Turuncoglu (3,4), Baris Onol (2)
AFFILIATIONS
  1. Eurasia Institute Of Earth Sciences, Istanbul Technical University Istanbul (Turkey)
  2. Aeronautics And Astronautics Faculty, Meteorological Engineering, Istanbul Technical University Istanbul (Turkey)
  3. Informatics Institute, Istanbul Technical University Istanbul (Turkey)
  4. Earth System Physics Section, International Centre For Theoretical Physics Trieste (Italy)
ABSTRACTThe Mediterranean Sea plays a crucial role in complex feedback mechanisms and processes of the Europe’s climate system. It is important to understand the air-sea interaction in this region, thus there are many studies conducted on the relationship between atmosphere and seas focusing on one of the main climate change hotspots, Mediterranean. In this study, the results of the coupled regional climate model were used to determine the effects of the largest of the semi-enclosed European seas (Mediterranean Sea) on the regional climate system. This coupled model, Regional Earth System Model (RegESM) is a newly developed modeling system which integrates atmosphere, ocean, river routing and wave components. The configuration of its two components was used to simulate the the feedback mechanisms within the atmosphere and ocean components. The simulations were performed for the period between 1979 and 2012 over Europe (50 km) that includes an active ocean component for Mediterranean Sea. The ERA-Interim reanalysis dataset is used as lateral boundary condition for both standalone and coupled model simulations. To investigate the relationship between sea surface conditions and the regional climate, a time-phase relationship analysis based simply on the lagged-correlations is applied to the model results (both standalone and coupled) and evaluated. The results of the analyses show that the considered variables over the sea (SST and evaporation) and the climate variables over the land (precipitation, surface air temperature, etc.) have strong relationship depending on the analyzed season and the selected sub-region over the sea. The results also indicate that the relationship is stronger in fall and winter seasons, which air-sea temperature difference is high. The lag (or response) time between anomalies of the sea related variables (SST and EVP) and the anomalies of the variables over the land is around 7-13 days for SST and 2-6 days for EVP. Acknowledgments This study has been supported by a research grant (113Y108) provided by The Scientific and Technological Research Council of Turkey (TUBITAK) and partly by The Abdus Salam International Center for Theoretical Physics (ICTP) Associateship Scheme. The computing resources used in this work were provided by National Center for High Performance Computing of Turkey (UHEM) under grant number 5003082013.
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