黑潮上游海區海洋動力學實驗─子計畫四：台灣東南海域黑潮與其鄰近水體之互動(II)
Date Issued
2001
Date
2001
Author(s)
王冑
DOI
892611M002030OP2
Abstract
For years, both the Kuroshio and the
South China Sea (SCS) circulation are
important research topics for our regional
oceanography. The processes of Kuroshio
intrusion into SCS and its later retrocession
from the latter are expected to be associated
with the variation of the Asian monsoon,
stratification of sea waters, the inflow
condition of the Kuroshio and the local
topography. During the past two years, we
have deployed current-meters and water
level recorders at several prescribed strategic
locations, such as Heng-Chuen Ridge, east
of Heng-Chuen, Gordi Rock, etc.. Aside of
these works, extensive CTD surveys had
been conducted in the KUDEX region too.
These current-meter data show that the
principal direction of flows at the lower
layer offshore the eastern Heng-Chuen
Pininsula (HCP) is mainly southward, same
behavior had been observed for flows at the
upper layer only during a prevailing
northeastly wind. Based on these
observations we may infer that there must be
a southward counter-current offshore the
eastern coast of HCP. Aside from this, the
measurements from the ADCP mooring, in
the channel between Lan-Yu and Ping-Tung,
show that the sub-inertial flows deflects
counter clockwisely with the increment of
depth, this characteristic implies that the
lower currents possess an on-shore
component which should induce upwelling
motions in the adjacent of continental
margin, and the latter then favors the
emergence of a cyclonic circulation on the
west side of the Kuroshio. The
aforementioned mechanism sounds
reasonable in interpreting the occurrence of
a counter current offshore the east coast of
HCP.
Subjects
Kuroshio
Intrusion
South China Sea
Counter current
cyclonic circulation
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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