A Study of Tidal and Subtidal Current in the Taiwan Strait
Date Issued
2005
Date
2005
Author(s)
Lin, Sheng Fong
DOI
zh-TW
Abstract
The current velocity profiles, bottom water temperature, and sea level were observed to study the spatial and temporal variations of the tidal and subtidal current in the Taiwan Strait from 1999 to 2000. Results indicate both diurnal and semidiurnal tidal currents were primarily barotropic. The barotropic diurnal tide might be explained by a single Kelvin wave propagating along the Mainland China coast from north to south. However, the barotropic semidiurnal tide manifested as a more complicated form in the Taiwan Strait.
In the northeast monsoon, the subtidal current generally fluctuated with the northeast winds. When the northeast wind was weak, the along- and cross-strait subtidal current flowed primarily against the wind and toward Taiwan, respectively. As the northeast wind intensified, the along-strait current flowed downwind, brought the cold China coastal water southward, and formed a baroclinic velocity front in the western portion of the Taiwan Strait. The Ekman effect forced the cross-strait current toward Mainland China in the upper water column. Nevertheless, the current in the lower water column remained toward Taiwan. From September 28 to December 14 of 1999, the along-strait volume transport, estimated from interpolated current velocity, varied from -5 to 2 Sv with a mean value of 0.12
Subjects
體積流量
低頻海流
潮流
Volume transport
Taiwan Strait
Tidal current
Subtidal current
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-94-D84241002-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):4d6b85904e651fe7d3f9c6110a5d2306