Heat transport variability of the Kuroshio east of Taiwan and its possible climatic effect

Based on long time hydrological reanalysis data from Japan Meteorological Agency, the heat transportof Kuroshio (KHT) east of Taiwan on the characteristic section (24°N Section) was estimated by using the dynamical method, and its lower frequency variability was analyzed with wavelet transform technique.Then, the relation between the KHT anomaly and the SSTA in China adjacent seas, as well as the implications of the pre-seasons(autumn, winter and spring) and homachronous(summer) KHT anomaly for summer rainfall anomaly over the Chinese mainland were discussed.The results show that, the KHT east of Taiwan presents notably quasi-2 a and around 16 a variations which were subject to temporal variety and seasonal discrepancy.There is a linear increasing trend in the heat transport for more than 50 years, while its magnitude is small and the long-term trends in four seasons are dissimilar.The correlation analysis suggests that, the KHT east of Taiwan is likely to be an important factor to impact the SST anomalous variation in east China seas on long time scale.And the regression analysis indicates that, the preceding and contemporaneous KHT anomalies east of Taiwan have strong implications for the summer rainfall variations over the east of the mainland with seasonal discrepancy.