南海黄岩岛珊瑚记录的1780-2013年的表层海温年代际变化特征  

Interdecadal variability of sea surface temperature from 1780 to 2013recorded in corals from the Huangyan Island in the South China Sea

作　　者：林丽芳 余克服[1,3] 陶士臣 韩韬[1,2] 张会领[4] Lin Lifang;Yu Kefu;Tao Shichen;Han Tao;Zhang Hulling(Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China;University of Chinese Academy of Science,Beijing 100049,China;Coral Reef Research Center of China,Guangxi University,Nanning 530004,China;Department of Ocean Engineering,Faculty of Engineering,Guangdong Ocean University,Zhanjiang 524088,China)

机构地区：[1]中国科学院南海海洋研究所中国科学院边缘海与大洋地质重点实验室,广东广州510301 [2]中国科学院大学,北京100049 [3]广西大学珊瑚礁研究中心,广西南宁530004 [4]广东海洋大学工程学院海洋工程系,广东湛江524088

出　　处：《海洋学报》2018年第9期31-42,共12页

基　　金：国家自然科学基金重点项目(91428203);国家重大科学研究计划项目(2013CB956102)

摘　　要：基于南海中部黄岩岛滨珊瑚生长率与表层海温距平(SSTA)的正相关关系,重建了1780-2013年(共234年)黄岩岛海域SSTA年际变化序列。结果表明,1780-1890年SSTA总体偏低,平均为-0.2℃,最低SSTA为-1℃(1837年),对应于小冰期晚期;1890年以来SSTA总体呈阶段性上升,其中1971-1998年升温最快,1998年达到峰值(2℃),之后SSTA略呈下降趋势,冷暖变化与北半球陆地温度变化基本是同步的。频谱分析显示,黄岩岛海域SSTA在过去234年主要呈现出26~34 a的冷暖周期波动,其相位转变基本与太平洋年代际振荡冷-暖位相同步。近234年来南海中部黄岩岛海域SSTA的年代际变率并不是持续不变的,1890年以来该海域SST年代际变率出现明显增强,可能与全球变暖导致的海洋内部变率的变化有关。考虑到热带西南太平洋SST年代际变率同样在1890年也发生了一次转变,我们认为这些证据可能指示了整个热带太平洋内部变率在1890年以后发生了一次转变。The relationship between coral growth rate and sea surface temperature anomaly（ SSTA） was used to reconstruct the SSTA in the central South China Sea Since 1780. Our reconstruction shows that SSTA over the period1780-1890,which correspond to the latter part of Little Ice Age,was cold relatively,the average SSTA was-0.2℃,the coldest SSTA was-1℃ in 1837. After 1890,the SSTA increased most fast between 1971 to 1998,the highest SSTA was 2℃ in 1998,but there was a downward trend after 1998,which is basically synchronous with the change of land temperature in Northern Hemisphere. The spectral analysis shows a significant period of 26-34 a for the SSTA in the central of South China Sea,with the phase transitions correspond to the decadal shifts of the Pacific Decadal Oscillation. The wavelet analysis indicated that the interdecadal oscillation of the SSTA in the central South China Sea was not stable over the past 234 years. After entering the Current Warm Period,the interdecadal variability has enhanced distinctly,which may be related to the changes in the internal variability of the ocean associated with the global warming. Our result,together with the change in the decadal-scale SST variability of the tropical southwest Pacific in the 1890,suggested that the internal variability of the tropical Pacific has changed since1890.

关 键 词：黄岩岛 珊瑚生长率 SSTA 小冰期 年代际变化 

分 类 号：P736.22[天文地球—海洋地质]