Kuroshio Axis Variation and its Impact on Sea Level Change of East China Kuroshio Axis Variation and its Impact on Sea Level Change of East China Kuroshio Axis Variation and its Impact on Sea Level Change of East China Kuroshio Axis Variation and its Impa

摘要

A close relationship is existing between the Kuroshio axis variation of the East China Sea and East China Sea level change. Based on AIPOcean 1.0 DataSet, this paper developed the principal axis extraction procedure, analyzed the response mechanism of East China Sea level change to the Kuroshio axis variation in depth, and obtained that: ①Being mainly influenced by the combined influence from monsoon, terrain, Changjiang diluted water etc., to the north of 26°N, the East China Sea Kuroshio axis is inclining to the west in winter and spring, while inclining to the east in summer and autumn; at northeastern Taiwan axis bend point, affected by the monsoon and the terrain, its deviation is just the opposite; ②The East China Sea Kuroshio axis is mainly located within 0-250m, mostly distributing at tide layer 1, 3, 4, 9, accounting for 72%. The Kuroshio mainstream is shrinking and narrowing with the depth, as a result of which most of the Kuroshio flow, quality and momentum transport concentrate at the middle and upper layer. ③With the increase of the principal axis velocity, the right side of sea level shows a downward trend while the right side of sea level rises as a whole. Since it is close to the Kuroshio source area, Kuroshio water with high velocity at the entrance to Kuroshio drives the left and right sides of sea level rising . In the north transport process, it will exchange material and energy with the East China Sea continental shelf water continuously. Its flow velocity will begin to decline as getting to the middle of Kuroshio, and both the left and right sides of sea level will show a slow decline or invariant feature.