近50年涠洲岛5次珊瑚冷白化的海洋站SST指标变化趋势分析

An Analysis on the Trend of Sea Surface Temperature Indices for Coral Cold Bleaching in Weizhou Island Ocean Observation Station during 1960-2009

根据涠洲岛海洋站实测海表温度(SST)历史资料和涠洲岛珊瑚礁普查历史资料,采用对比分析与相关分析方法,分析1960―2009年冬季珊瑚冷白化4种SST指标的变化特征。结果显示:(1)涠洲岛珊瑚冷白化的该站SST值为极端低海温(SSTMIN)≤13.2℃或最冷周海温(SSTMCW)≤14.0℃;(2)4种珊瑚冷白化SST指标呈准同步变化,无上升趋势,且其变化趋势与全球变暖无明显对应关系。

According to the historical data of Sea Surface Temperature （SST） and reef census in the sea area of Weizhou Island, the trend of four coral cold bleaching SST indices from 1960 to 2009 was analyzed by using correlational and contrastive analysis methods. The results show that the four coral cold bleaching SST indices had a trend of quasi-synchronous variation but no rising trend, and this trend had no significant relationship with global warming. Coral cold bleaching threshold SST was SSTMIN≤13.2℃, or SSTMCW（mean SST of the coldest week）≤14.0 ℃ in the Weizhou Island area.