Analysis of Sea Surface Pressure Climatology and Cyclogenesis Patterns over the Black Sea

Semi-permanent low-pressure centers form as a result of topographical features and atmospheric flows. The precise location and intensity of these centers significantly influence the weather patterns in the surrounding countries. In the same context, the occurrence of cyclogenesis over the Black Sea, often mentioned as the Black Sea Low, significantly impacts the weather conditions in Türkiye. A cyclone must persist throughout the year to be classified as a semi-permanent pressure system, however, the literature indicates the potential existence of high-pressure areas in the Black Sea as well. This study aims to investigate the presence of the Black Sea Low by examining low-pressure centers over the region, to determine the frequency and seasonality of cyclonic activity. The ERA5 dataset with 0.25° resolution is used for the analysis, covering the period from 1940 to 2023. Related variables like mean sea level pressure, sea surface temperature, temperature, wind speed, and total precipitation are examined to investigate the persistence and seasonal variations of the low-pressure center over the Black Sea through synoptic pattern categorizations of cyclogenesis over the Black Sea. The preliminary results indicate a low-pressure pattern on the southeastern Black Sea, which is seasonal and forms during the summer months over the region.