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Ocean observation results along 130°E line south of Japan : Observational report during Koyo-maru 77th cruise

水産大学校研究報告 Volume 68 Issue 1 Page 29-39
published_at 2019-11
68-1-29-39.pdf
[fulltext] 1.77 MB
Title
日本南方東経130度線における海洋観測結果 : 耕洋丸第77次航海報告
Ocean observation results along 130°E line south of Japan : Observational report during Koyo-maru 77th cruise
Creators Kashino Yuji
Creators Kamano Tadashi
Source Identifiers
Creator Keywords
North Equatorial Current surface low-salinity water Japanese eel Koyo-maru 77th cruise Ocean circulation
Ocean observations were conducted along 130°E on the way to Koror (Republic of Palau) during Koyo-maru 77th cruise on October 2018. During the cruise, the North Equatorial Current (NEC) was observed with geostrophic volume transport exceeding 70 Sv (1Sv=10^6m^3/s) above 1000 dbar between 8°N and 24°N. In particular, it was strong north of 18°N. We found that surface (<100m) high temperature (>25℃)/ low salinity (<34.5PSU) water existed not only at southern part but also at northern part of the 130°E line. Because we could not find cloud cluster associated with the Intertropical Convergence Zone around the northern part of 130°E, it is suggested that the surface high-temperature/low-salinity water was advected by the NEC. Thus, we suggest that change of the NEC should be monitored and discussed because the boundary of this low-salinity water is thought to be the landmark of the spawing ground of Japanese eel in the NEC region.
Languages jpn
Resource Type departmental bulletin paper
Publishers 水産大学校
Date Issued 2019-11
File Version Version of Record
Access Rights open access
Relations
[ISSN]0370-9361