Comparative analysis of interannual variability of water temperature on the surface of the southwestern part of the Barents Sea and on the Kola Section
https://doi.org/10.36038/2307-3497-2021-186-119-131
Abstract
Objective: to determine the area of the Barents Sea, the variability of which annual sea surface temperature (SST) has a high level of statistical correlation with that in the layers 0–50 and 0–200 m in the Kola Section, which crosses the flow of Atlantic waters of the Murmansk current.
Using methods: analysis of water temperature data for presence of trends, cyclic components, correlation and regression analysis, calculations of statistical characteristics were performed using MS Excel 2007 package. To study the frequency structure of interannual water temperature fluctuations, the spectral analysis implemented in the software package “AutoSignal” was used.
Novelty: The 1951–2017 data revealed a polygon in the southwestern part of the Barents Sea with coordinates 71–73° N and 31–33° E, where mean SST has a high correlation with sea water temperature of the 0–50 m layer on the Kola Section (r = 0.92). This allows the surface temperature to be used to estimate its interannual variability and to recover data gaps on the section.
Result: spectral compositions of water temperature variations of the Atlantic genesis water, obtained by different methods, have insignificant differences in all frequency ranges, that determines their close correlation. Over the considered 67-year time range in 90 % of cases SST anomalies on the identified polygon and average temperature in the 0–50 m layer on the Kola Section coincided by sign, and in 81 % of years their difference in absolute value is not exceed 0.3 °C. Since 1996, during the period of modern warming of sea waters during 22 years, the temperature deviations from the norms on the polygon and on section were only positive, and the difference of anomalies was less than 0.2 °C.
Practical significance: Using SST data in a selected section of the Barents Sea, it is possible to restore water temperature gaps in the Kola Section, analyze the features of its inter-annual variability and predict the dynamics of the sea climate.
About the Authors
V. D. Boitsov
Novgorod Branch of VNIRO («NovgorodNIRO»)
Russian Federation
Russian Federation
Vladimir D. Boitsov
38 f. 2, Oktyabrskaya St., Veliky Novgorod, 173002
V. V. Guzenko
St. Petersburg Maritime Assembly
Russian Federation
Russian Federation
Vladimir V. Guzenko
English embankment 42, Saint-Petersburg, 190000
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Review
For citations:
Boitsov V.D., Guzenko V.V. Comparative analysis of interannual variability of water temperature on the surface of the southwestern part of the Barents Sea and on the Kola Section. Trudy VNIRO. 2021;186:119-131. (In Russ.) https://doi.org/10.36038/2307-3497-2021-186-119-131
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