Validation of degree heating weeks as a coral bleaching index in the northwestern Pacific
Validation of degree heating weeks as a coral bleaching index in the northwestern Pacific
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DOI：
10.1007/s00338-016-1524-y
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发表时间：
2017-03-01
期刊：
影响因子：
3.5
通讯作者：
Kayanne, Hajime
中科院分区：
文献类型：
--
作者：
Kayanne, Hajime
大规模白化是珊瑚礁面临的最大威胁。美国国家海洋和大气管理局监测世界海洋表面温度(SST)，并根据加热周度(DHW)发布白化警告，DHW是指超过给定区域每月最大平均SST的温度异常的累积。DHW值>；4.0A C周被认为会导致漂白，而>；8.0A C周被认为会导致广泛的漂白和一些死亡。本研究通过对西北太平洋8个站点的现场历史观测，验证了DHW作为大规模漂白指标的有效性。大规模的漂白事件发生在不同的年份，不同的地点。有记录的漂白事件的年份与DHW值和8摄氏度的周很好地匹配，逻辑上预测的漂白事件相对于DHW的概率显示出正相关。DHW为漂白提供了一个合理的阈值。
Mass bleaching is the most significant threat to coral reefs. The United States National Oceanic and Atmospheric Administration monitors world sea surface temperature (SST) and releases warnings for bleaching based on degree heating weeks (DHW), which is the accumulation of temperature anomalies exceeding the monthly maximum mean SST for a given region. DHW values > 4.0 A degrees C-weeks are thought to induce bleaching, and those > 8.0 A degrees C-weeks are thought to result in widespread bleaching and some mortality. This study validates the effectiveness of DHW as a mass bleaching index by on-site historical observation at eight sites in the northwestern Pacific Ocean. The mass bleaching events occurred during different years at different sites. The recorded years of the bleaching events matched well with DHW values > 8 A degrees C-weeks, and the logistically projected probability of bleaching against DHW showed a positive relationship. DHW provides a reasonable threshold for bleaching.