Warming of intermediate water in the sea of Okhotsk since the 1950s |
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| Authors: | Motoyo Itoh |
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| Institution: | (1) Institute of Observational Research for Global Ocean, Japan Agency for Marine-Earth Science and Technology, Natsushima-cho, Yokosuka 237-0061, Japan |
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| Abstract: | Okhotsk Sea Intermediate Water (OSIW), the source water for ventilation of North Pacific Intermediate Water, exhibits a multidecadal
warming trend. Historical data show that OSIW temperatures increased by 0.28, 0.57, 0.31 and 0.10°C during 1955 to 2003 at
potential densities of 26.8, 27.0, 27.2 and 27.4σ
θ
, at depths of approximately 250, 500, 700 and 900 m, respectively. This rate of warming is much faster than that of the global
ocean. This OSIW warming is likely linked to the reduced ventilation of cold Dense Shelf Water associated with brine rejection
during sea ice formation. |
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| Keywords: | Warming intermediate water Okhotsk Sea |
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