Observation on the Volume transport of the Kuroshio South of Japan
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概要
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The Kuroshio south of Japan shows a clear bimodal path characteristic between large meander pathand no large meander path. It has been pointed out by many studies that the volume transport of theKuroshio is an important parameter which controls the selection of the bimodal Kuroshio path. However,a clear relationship between the intersity of volume transport and the selection of the Kuroshio path hasbeen not clarified yet. From these view points, we have made hydrographic observations of the Kuroshiosouth of Japan over the period of 1983-1988. In this report, we present the basic data of geostrophicvolume transport referred to 1500 db and the volume transport observed by suspended current meter fromthe vessel. It is shown that there exists a remarkable variation in volume transport. The geostrophictransport is relatively larger in period of no large meander (70.5±9.8 Sv) than that in large meander (61.8±20.0 Sv. The largest transport is observed during the transition period from no meander path to largemeander path in winter of 1986.日本南岸の黒潮は大蛇行流路と非大蛇行流路との間で明確な二様性を示す。従来の多くの研究から黒潮流量が流路の重要なパラメータであることが指摘されているが，はっきりした黒潮流量の大小とその時の流路の形との関連が得られていない。このような観点から，1983年から1988年の間に黒潮に関する各層観測を行った。この報告では1500dbを無流面とする地衡流および船から係留した流速計による流速値の鉛直分布を提示した。全データの平均から，黒潮流量は非大蛇行期に70.5±9.8Svで大蛇行期の61.8±20.0Svよりも大きいことがわかった。また，黒潮流量は1986年の冬の非大蛇行流路から大蛇行流路への移行期に最大となることが示された。
- Faculty of Bioresources, Mie Universityの論文
- 1991-03-28
Faculty of Bioresources, Mie University | 論文
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