Морской гидрофизический журнал. 2024; 40: 255-270
Влияние апвеллинга на распределение хлорофилла a в прибрежной зоне Юго-Восточной Балтики в летний период 2000–2019 годов
Аннотация
Цель. Получение количественных оценок влияния апвеллинга на распределение хлорофилла а летом в прибрежной зоне Юго-Восточной Балтики в 2000–2019 гг. – цель настоящей тработы.
Методы и результаты. По данным о повторяемости и продолжительности апвеллингов за июнь – август 2000–2019 гг. и мультисенсорных спутниковых наблюдений концентрации хлорофилла а в прибрежной зоне Юго-Восточной Балтики получены среднемноголетние и среднемесячные значения исследуемых параметров и оценено влияние событий подъема вод на концентрацию хлорофилла а в поверхностном слое моря. Показано влияние апвеллингов на пространственное распределение хлорофилла а в прибрежной зоне моря. Установлено, что снижение его концентрации более чем на 1 мг/м3 наблюдается после подъема вод любой продолжительности и во все месяцы. Максимальные падения концентрации хлорофилла а отмечены после длительных апвеллингов продолжительностью > 6 дней.
Выводы. В течение недели после апвеллинга летом в прибрежной зоне Юго-Восточной Балтики наблюдаются пониженные концентрации хлорофилла а по сравнению со значениями, предшествующими возникновению апвеллинга.
Список литературы
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Morskoy Gidrofizicheskiy Zhurnal. 2024; 40: 255-270
Influence of Coastal Upwelling on Chlorophyll a Distribution in the Coastal Zone of the Southeastern Baltic Sea in Summer Periods, 2000–2019
Abstract
Purpose. The study is purposed at obtaining the quantitative estimates of coastal upwelling influence on the distribution of chlorophyll a in the coastal zone of the southeastern Baltic Sea during the summer seasons in 2000–2019.
Methods and Results. Based on the data both on frequency and duration of upwelling events for June – August 2000–2019 and the chlorophyll a concentrations derived from multi-sensor satellite observations in the coastal zone of the southeastern Baltic Sea, the long-term and monthly average values of the studied parameters are obtained, and the influence of upwelling events on the chlorophyll a concentration in the sea surface layer is assessed. The spatial variability of chlorophyll a in the coastal areas is found to be related to the influence of upwelling events. On the average, the chlorophyll a concentration decreases by more than 1 mg/m3 after an upwelling of any duration and in all summer months. The concentration drop is most significant after the upwelling events lasting more than 6 days.
Conclusions. The reduced chlorophyll a concentrations (as compared to the pre-upwelling values) are observed in course of a week after a coastal upwelling event in the southeastern Baltic Sea.
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