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利用珊瑚生长率重建西沙海域罗马暖期中期海温变化
引用本文:黄博津,余克服,张会领,施祺,陈天然,陶士臣,严宏强,刘国辉. 利用珊瑚生长率重建西沙海域罗马暖期中期海温变化[J]. 热带地理, 2013, 33(3): 237-241
作者姓名:黄博津  余克服  张会领  施祺  陈天然  陶士臣  严宏强  刘国辉
作者单位:(中国科学院南海海洋研究所, 广州 510301)
基金项目:中国科学院战略先导科技专项课题(XDA05080300);国家重大科学研究计划课题(2013CB956102,2010CB950101)
摘    要:珊瑚生长率是记录海水表层温度(SST)的一个重要代用指标。本文以南海中北部西沙永兴岛罗马暖期期间发育的3个澄黄滨珊瑚(Porites lutea)为材料,测量它们的骨骼生长率,并利用珊瑚骨骼生长率与SST的关系式定量重建海温年际变化序列。结果显示:3个滨珊瑚(生长于120-59 BC、46 BC-14 AD和30 BC-28 AD期间)的平均生长率分别为0.88 cm/a(变化于0.53~1.24 cm/a之间)、0.90 cm/a(变化于0.58~1.53 cm/a之间)和1.12 cm/a(变化于0.71~1.46 cm/a之间)。据此重建同时段年平均SST,相应结果分别为26.7℃、26.8℃和27.3℃。2 kaBP前后(120-59 BC,46 BC-28 AD)西沙海域平均SST为26.9±0.4℃,低于现代(1981-2010 AD)约0.7℃。

关 键 词:珊瑚生长率  SST  罗马暖期  西沙海域  

Sea Surface Temperature Variations during the Middle Rome Warm Period as Reconstructed by Poritescoralgrowth Rates in the Xisha Islands
HUANG Bojin,YU Kefu,ZHANG Huiling,SHI Qi,CHEN Tianran,TAO Shichen,YAN Hongqiang,LIU Guohui. Sea Surface Temperature Variations during the Middle Rome Warm Period as Reconstructed by Poritescoralgrowth Rates in the Xisha Islands[J]. Tropical Geography, 2013, 33(3): 237-241
Authors:HUANG Bojin  YU Kefu  ZHANG Huiling  SHI Qi  CHEN Tianran  TAO Shichen  YAN Hongqiang  LIU Guohui
Abstract:The skeletal growth rates of Porites corals are important indicators of ambient sea surface temperatures (SST). Three Porites corals collected from Yongxing Island, Xisha Islands, dated to 120-59 BC, 46 BC-14 AD and 30 BC-28 AD respectively, were analyzed for skeletal growth rates to reconstruct the local SST variations in the Rome Warm Period. The mean values of their growth rates were 0.88 cm/a, 0.90 cm/a and 1.12 cm/a, ranging from 0.53-1.24 cm/a, 0.58-1.53 cm/a, and 0.71-1.46 cm/a, respectively. The reconstructed average annual SST were 26.7℃, 26.8℃ and 27.3℃ respectively. The average SST in the Xisha Islands was 26.93±0.41℃ during the Rome Warm Period (120-59BC,46BC-28AD), 0.7℃ lower than the mean temperature recored from 1981 to 2010 AD.
Keywords:coral-growth rate  SST  Rome Warm Period  Xisha Islands
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