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Analysis of a vortex causing sea-effect snowfall in the western part of the Black Sea: a case study of events that occurred on 30–31 January 2012
Natural Hazards ( IF 3.7 ) Pub Date : 2021-03-26 , DOI: 10.1007/s11069-021-04707-8
Veli Yavuz , Ali Deniz , Emrah Tuncay Özdemir

In this study, snow events in the Marmara region were identified for the 2009–2018 period, and then the times at which a vortex causing the formation of a sea-effect snow (SES) band was seen over the Black Sea were determined from Terra, MSG-2 and MSG-3 satellite imagery. During this period, the SES band was found only between 30 and 31 January 2012 over the western Black Sea. This band maintained its dominance over the region for approximately 24 h. The cause and effects of this band and the precipitation that resulted were investigated. Meteorological data published by 12 airports, 16 meteorological stations and 5 radiosonde stations belonging to five countries were analysed within the two-day period to describe the relevant meteorological conditions. In addition, sea surface temperature data and synoptic charts of the upper atmospheric levels were investigated. According to the results, the maximum amount of snow (24 cm) was observed at the Inebolu Station (in Turkey). As a result of the effect of the vortex-type SES band moving over the Marmara and western Black Sea regions, a total of 102 flights belonging to a private airline company were cancelled, sea transportation was disrupted, and vehicular accidents occurred in Istanbul. In all radiosonde measurements, inversion layers were observed between the surface and the 700 hPa level, and wind direction changes occurred mostly between 0° and 50° within the same level range. The temperature difference between the sea surface and the 850 hPa level reached 25.8 °C where the vortex-type SES band core was located. In the synoptic level charts, the dominance of a low-pressure centre during the two-day period was observed in the area where the vortex-type SES band was formed.



中文翻译:

对黑海西部造成海洋降雪的漩涡的分析:2012年1月30日至31日发生的事件的案例研究

在这项研究中,确定了马尔马拉地区2009-2018年的降雪事件,然后从Terra中确定了在黑海上空观察到引起海雪形成(SES)波段的涡旋的时间。 ,MSG-2和MSG-3卫星图像。在此期间,仅在2012年1月30日至31日之间在西部黑海上空发现了SES波段。该频带在整个区域保持其主导地位约24小时。研究了该频带的因果关系以及由此产生的降水。在两天内对来自五个国家的12个机场,16个气象站和5个无线电探空站发布的气象数据进行了分析,以描述相关的气象条件。此外,研究了海面温度数据和高层大气的天气图。根据结果​​,在Inebolu站(土耳其)观察到最大积雪(24厘米)。由于涡旋型SES波段在马尔马拉和黑海西部地区移动的影响,属于一家私人航空公司的102趟航班被取消,海上运输受到干扰,伊斯坦布尔发生了车祸。在所有探空仪测量中,在地面和700 hPa液位之间都观测到了反演层,并且在相同液位范围内,风向变化主要发生在0°和50°之间。涡旋型SES带芯所在的海面与850 hPa之间的温差达到25.8°C。在概要级别的图表中,

更新日期:2021-03-26
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