Thermohaline characteristics of the Azov Sea in the summer season of 1989–2021 and how they are affected by the runoff of the Don and Kuban Rivers
Considerable inter-annual variations of water temperature and salinity in the Azov Sea necessitate their constant monitoring. Following the numerous studies undertaken in this area, this work presents the specific features of inter-annual changes in temperature and salinity of the sea surface layer, averaged for the summer seasons of 1989–2021 both for the Azov Sea (excluding Taganrog Bay) and for its various areas; two representative time spans, 1989–2004 and 2005–2021, have been identified. The first time span was characterized by a relatively wide variation range of the temperature and by its decreased values, as well as by the decrease in the salinity. During the second time span, an increase in the both temperature and salinity of the sea surface layer occurred in the sea and its regions, which was induced by the increase in the air temperatures in the area and by the reduction of the relatively cold Don River runoff after 2005 in the case of the first parameter, and, for the second parameter, it resulted from the decrease in the runoff of the both Don and Kuban Rivers. Correlation analysis of the series of the summer temperature and salinity values by area and for the sea on the whole as they relate to the annual and maximum runoff of the Don River (Razdorskaya) and to the annual runoff of the Kuban River (Krasnodar and the river mouth) for 1989–2021 has shown the absence of the significant relationship with temperature and its presence with salinity both for the sea and for most of its regions at the confidence level of 99 % for the Don River runoff and 95 % for the Kuban River runoff.
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2023
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| Subjects: | Annual variations, Long-term records, Correlation analysis, Salinity data, Air temperature, Sea surface salinity, Корреляционный анализ, Режим температуры воды, ASFA_2015::R::Runoff, ASFA_2015::T::Thermohaline circulation, ASFA_2015::S::Sea surface temperature, |
| Online Access: | http://hdl.handle.net/1834/42633 |
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| Summary: | Considerable inter-annual variations of water temperature and salinity in the Azov Sea necessitate their constant monitoring. Following the numerous studies undertaken in this area, this work presents the specific features of inter-annual changes in temperature and salinity of the sea surface layer, averaged for the summer seasons of 1989–2021 both for the Azov Sea (excluding Taganrog Bay) and for its various areas; two representative time spans, 1989–2004 and 2005–2021, have been identified. The first time span was characterized by a relatively wide variation range of the temperature and by its decreased values, as well as by the decrease in the salinity. During the second time span, an increase in the both temperature and salinity of the sea surface layer occurred in the sea and its regions, which was induced by the increase in the air temperatures in the area and by the reduction of the relatively cold Don River runoff after 2005 in the case of the first parameter, and, for the second parameter, it resulted from the decrease in the runoff of the both Don and Kuban Rivers. Correlation analysis of the series of the summer temperature and salinity values by area and for the sea on the whole as they relate to the annual and maximum runoff of the Don River (Razdorskaya) and to the annual runoff of the Kuban River (Krasnodar and the river mouth) for 1989–2021 has shown the absence of the significant relationship with temperature and its presence with salinity both for the sea and for most of its regions at the confidence level of 99 % for the Don River runoff and 95 % for the Kuban River runoff. |
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