Abstract
Long-term AVHRR SST change analysis in the Taiwan Strait using the rotated EOF method
Highlights
The Taiwan Strait (TS) connects the East China Sea (ECS) and South China Sea (SCS), and the water flow in the strait is mainly northward because of the pressure gradient associated with large-scale circulation (Chuang 1985, 1986)
Long-term sea surface temperature (SST) warming in the TS was discussed by Belkin and Lee (2014)
They used the climatological data set HadISST1 from the UK Met Office Hadley Centre for the period between 1957 and 2011 and showed that SST warming in the TS was considerably enhanced in winter
Summary
The Taiwan Strait (TS) connects the East China Sea (ECS) and South China Sea (SCS), and the water flow in the strait is mainly northward because of the pressure gradient associated with large-scale circulation (Chuang 1985, 1986). High-resolution SST data and empirical orthogonal function (EOF) analysis can help in efficiently extracting information from spatiotemporally varying physical quantities. REOF can simplify the spatial structure while preserving robust patterns It can avoid dipole-like EOF patterns that cannot be physically interpreted (Cheng et al 1995; Hannachi et al 2006). REOF analysis might be a better tool for determining the spatiotemporal variation of the long-term SST in the TS. Satellite SST data with a high resolution (4 km), covering a period of 33 years were used to investigate TS warming in this study. Both EOF and REOF analysis were applied to simplify and quantify the spatiotemporal SST variability.
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