Inter-Annual Variability of Water Exchange between the Azov Sea and the Sivash Bay through the Tonky Strait

IF 0.7 Q4 OCEANOGRAPHY Physical Oceanography Pub Date : 2020-09-01 DOI:10.22449/0233-7584-2020-5-532-544
Е. Eremina, V. Evstigneev
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Abstract

Purpose. The work is aimed at studying the components’ intra- and inter-annual variability in the water exchange between the Sivash Bay and the Sea of Azov through the Tonky Strait at the current climatic period based on the empirical conversion schemes and using the hydrometeorological observation data obtained at the nearby stations. Methods and Results. Using the data on the sea level, and the wind direction and speed, the runoffs of the Azov Sea and the Sivash Bay waters in the Tonky Strait during 1966–2013 are calculated by two methods developed by Slatinsky Yu.G. in 1969 and Raskin L.G. in 1992. Predominance of the Azov currents over the Sivash ones is revealed. Seasonal and long-term dynamics of the runoff values in the strait are given based on the monthly average and annual average data. The data on the wind regime variability in the Genichesk region, and the sea level at the Genichesk meteorological station and at the Chongarsky bridge meteorological post are cited. Conclusions. The calculations show that the average annual inflow of the Azov waters through the Tonky Strait varies within the wide range 0.3 km3 – 1.18 km3, and the outflow of the Sivash waters constitutes on average 0.26 km3 per year. Difference between the water inflow and outflow in the strait is characterized by high inter-annual variability. Over the whole period under study, it amounted on average up to 0.45 km3. In the components’ spectrum of water exchange between the Sivash Bay and the Azov Sea, distinguished are the ~ 4 year fluctuations of the Sivash waters outflow from the bay, and the 3 and 5–6 year fluctuations of the Azov Sea waters inflow to the Sivash Bay. Multi-year variability of the Sivash water outflow with the 4 year periodicity is conditioned by the same precipitation amount periodicity over the Sivash Bay.
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亚速海和锡瓦什湾通过通基海峡的水交换年际变化
意图本工作旨在基于经验转换方案,并使用附近站点获得的水文气象观测数据,研究当前气候期西瓦什湾和亚速海之间通过通基海峡的水交换分量的年内和年间变化。方法和结果。根据海平面、风向和风速的数据,采用Slatinsky Yu.G.于1969年和Raskin L.G.于1992年开发的两种方法计算了1966年至2013年东基海峡亚速海和西瓦什湾水域的径流。揭示了亚速流对锡瓦什流的主导作用。根据月平均和年平均数据,给出了海峡径流量的季节和长期动态。引用了Genichesk地区的风况变化数据,以及Geniches克气象站和Chongarsky大桥气象站的海平面数据。结论。计算表明,亚速海通过顿基海峡的年均流入量在0.3 km3至1.18 km3之间变化,锡瓦什水的流出量平均每年0.26 km3。海峡入流和出流的差异具有较高的年际变化特征。在整个研究期间,它的平均含量高达0.45 km3。在西瓦什湾和亚速海之间的水交换分量谱中,可区分的是西瓦什海水从海湾流出的~4年波动,以及亚速海海水流入西瓦什海湾的3-6年波动。锡瓦什湾4年周期性的锡瓦什水流出的多年变化受到相同降水量周期的制约。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Physical Oceanography
Physical Oceanography OCEANOGRAPHY-
CiteScore
1.80
自引率
25.00%
发文量
8
审稿时长
24 weeks
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