Water temperature variations off the Sakhalin coast from the data of instrumental observations
- Authors: Shevchenko G.V.1, Kirillov K.V.1
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Affiliations:
- Institute of Marine Geology and Geophysics, Far Eastern Branch
- Issue: Vol 42, No 3 (2017)
- Pages: 189-197
- Section: Article
- URL: https://journals.rcsi.science/1068-3739/article/view/230057
- DOI: https://doi.org/10.3103/S1068373917030062
- ID: 230057
Cite item
Abstract
The data of instrumental observations of water temperature at autonomous bottom stations in the coastal zone of Sakhalin Island (the depth is 3-17 m) mainly along the southeastern coast are analyzed. The cases of sharp (by 15°C per day) temperature drop are detected. They are caused by the strengthening of southern and southwestern winds typtcal of summer and betng the offshore winds which favor the lift of cold water to the surface. This phenomenon is observed every year but its intensity varies depending on the frequency of offshore winds. Along the southwestern coast of Sakhalin, where the offshore effect is induced by northern, northeastern, and eastern winds characterized by the low frequency of occurrence, water temperature drops are rarer and shorter (3-5 days) but rather sharp. The occurrence of cold water (its temperature is sometimes negative) in the shallow coastal zone may lead to the mass mortality of juvenile salmon after its downstream migration in spawning rivers, may impede the approaches of humpback salmon and negatively affect its catch.
About the authors
G. V. Shevchenko
Institute of Marine Geology and Geophysics, Far Eastern Branch
Author for correspondence.
Email: g.shevchenko@imgg.ru
Russian Federation, ul. Nauki 1B, Yuzhno-Sakhalinsk, 693022
K. V. Kirillov
Institute of Marine Geology and Geophysics, Far Eastern Branch
Email: g.shevchenko@imgg.ru
Russian Federation, ul. Nauki 1B, Yuzhno-Sakhalinsk, 693022