Copyright © The Oceanographic Society of Japan.
Oyashio water flowing into the Mixed Water Region (MWR) and the Kuroshio Ex-tension region that forms North Pacific Intermediate Water (NPIW) has been exam-ined, based on four Conductivity-Temperature-Depth profiler (CTD)/Lowered Acous-tic Doppler Current Profiler (L-ADCP) surveys of water masses an...
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| Format: | Text |
| Language: | English |
| Published: |
2003
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.459.7368 http://svr4.terrapub.co.jp/journals/JO/pdf/5906/59060855.pdf |
| Summary: | Oyashio water flowing into the Mixed Water Region (MWR) and the Kuroshio Ex-tension region that forms North Pacific Intermediate Water (NPIW) has been exam-ined, based on four Conductivity-Temperature-Depth profiler (CTD)/Lowered Acous-tic Doppler Current Profiler (L-ADCP) surveys of water masses and ocean currents. There are two processes by which the Oyashio water intrudes across the Subarctic Front (SAF): one is a direct cross-nearshore-SAF transport near Hokkaido along the western boundary, and the other is a cross-offshore-SAF process. Seasonal variations were observed in the former process, and the transport of the Oyashio water across SAF near Hokkaido in the density range of 26.6–27.4σθ was 5–10 Sv in spring 1998 and 2001, and 0–4 Sv in autumn 2000, mainly corresponding to the change of the southwestward Oyashio transport. Through the latter process, 5–6 Sv of the Oyashio water was entrained across the offshore SAF from south of Hokkaido to 150°E in both spring 2001 and autumn 2000. The total cross-SAF Oyashio water transport contributing to NPIW formation is more than 10 Sv, which is larger than previously reported values. Most of the Oyashio water formed through the former process was |
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