Comparison of wind and wave sources for turkish coasts

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2014

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Esen, Mustafa

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Hourly wind measurements are the most important and commonly used data to estimate wave climate for Turkish coasts. There are several data sources, available for coastal engineers in Turkey, among which hourly wind measurements of Turkish coastal meteorological stations (TCMSs) are the most easily obtained and used data. However, due to several features and factors, the overall performance of TCMSs’ representability for onshore winds is low. Therefore, a need arises to search and use alternative wind data sources. ECMWF which provides 6 hourly wind data under various data sets is planned to be used, but at first the accuracy of ECMWF wind data is investigated. For this, ECMWF wind data is compared with land-based in-situ wind measurements at Sinop region, after the land-based wind data is carried to the same environment and elevation of ECWMF wind data. By smoothing the in-situ wind fields and increasing the data set with obtaining hourly wind data with linear connection of successive 6 hourly ECMWF winds, the wind changes are divided into certain groups and by looking into their correlations with the corresponding ECMWF wind data four different modification methods are achieved. At next stage, ECMWF wind speeds are modified by these four methods and the modifications which give the best correlations with in-situ wind are determined. In the final stage, these modification methods are applied to certain storms during which in-situ wave measurements are available. Using the modified ECMWF wind speeds, wave estimations are performed with a numerical model and the resulting wave heights are compared to in-situ wave heights. In addition, in order to have an idea about possible use of these modification methods for other coastal regions, a storm, during which wave measurements are available, is chosen at Hopa, Black Sea coast of Turkey.

Subject Keywords

Winds, Wind forecasting., Weather forecasting., Climatology

URI

http://etd.lib.metu.edu.tr/upload/12618079/index.pdf
https://hdl.handle.net/11511/23938

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. Esen, “Comparison of wind and wave sources for turkish coasts,” Ph.D. - Doctoral Program, Middle East Technical University, 2014.