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Summertime sea surface temperature fronts associated with upwelling around the Taiwan Bank |
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| Authors: | Kuo-Wei Lan Hiroshi Kawamura Ming-An Lee Yi Chang Jui-Wen Chan Cheng-Hsin Liao |
| Institution: | 1. Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, 2 Pei-Ning Road, Keelung 20224, Taiwan, ROC;2. Ocean Environment Group, Center for Atmospheric and Ocean Studies, Graduate School of Science, Tohoku University. Aramaki Aza Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan;3. Remote Sensing Laboratory, Taiwan Ocean Research Institute, Keelung 20224, Taiwan, ROC |
| Abstract: | It is well known that upwelling of subsurface water is dominant around the Taiwan Bank (TB) and the Penghu (PH) Islands in the southern Taiwan Strait in summertime. Sea surface temperature (SST) frontal features and related phenomena around the TB upwelling and the PH upwelling were investigated using long-term AVHRR (1996–2005) and SeaWiFS (1998–2005) data received at the station of National Taiwan Ocean University. SST and chlorophyll-a (Chl-a) images with a spatial resolution of 0.01° were generated and used for the monthly SST and Chl-a maps. SST fronts were extracted from each SST images and gradient magnitudes (GMs); the orientations were derived for the SST fronts. Monthly maps of cold fronts where the cooler SSTs were over a shallower bottom were produced from the orientation. |
| Keywords: | SST front Entropy-based edge detection Upwelling Chlorophyll-a Taiwan Bank Penghu Islands |
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