文献类型：期刊文献

英文题名：Coral perspective on temperature seasonality and interannual variability in the northern South China Sea during the Roman Warm Period

作者：Jiang, Leilei[1];Yu, Kefu[1,2];Han, Tao[1,3];Tao, Shichen[4];Zhang, Huiling[5]

机构：[1]Guangxi Univ, Coral Reef Res Ctr China, Sch Marine Sci, Guangxi Lab Study Coral Reefs South China Sea, Nanning 530004, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China;[3]Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China;[4]Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China;[5]Guangdong Ocean Univ, Coll Ocean Engn, Zhanjiang 524088, Peoples R China

年份：2021

卷号：207

外文期刊名：GLOBAL AND PLANETARY CHANGE

收录：SCI-EXPANDED(收录号：WOS:000707114300002)、、EI(收录号：20214111017486)、Scopus(收录号：2-s2.0-85116859666)、WOS

基金：This work was supported by the National Science Foundation of China (Grant numbers 42030502 and 42090041), the Guangxi scientific projects (Grant numbers AD17129063 and AA17204074), and the Bagui Fellowship from Guangxi Province of China (Grant number 2014BGXZGX03). U-Th dating were carried out at the University of Queensland and was financially supported by an Australian Research Council discovery project (DP0773081). We acknowledge Gangjian Wei for providing the international coral standard (JCp-1 Porites spp.). We also appreciate Bojin Huang for her assistance with the sub-sampling. We sincerely appreciate the efforts of Editor Alan Haywood and two anonymous reviewers for their careful works and constructive suggestions, which greatly improved this manuscript.

语种：英文

外文关键词：Coral Sr/Ca; Sea-surface temperature; Seasonality; El Nino-Southern Oscillation; Roman Warm Period; South China Sea

外文摘要：Few reconstructions of sea-surface temperature (SST) have focused on seasonal and interannual variability, two major components of the global climate system, due to the limited temporal resolution of proxies. This study presents a combined 228-year-long, monthly resolved strontium to calcium ratios (Sr/Ca) record covering the period of 2070-1740 a BP (years before 1950 CE (Common Era)) extracted from three U-series-based sub-fossil Porites corals located on the Xisha Islands, northern South China Sea (SCS). The composite time series allowed for accurate assessment of the natural range of SST variations during snapshots of the Roman Warm Period (RWP). Reconstructed SST revealed that the RWP was characterized by cooler conditions compared with the 20th century, consistent with climatic variations in the western Pacific and East Asia. The amplitude of SST seasonality was within the modern range, except for a lower value at 1980-1928 a BP. Interannual variability associated with El Nino-Southern Oscillation (ENSO) activity was enhanced by 39% relative to 1980-2014 CE. The results of the sliding window demonstrate that ENSO variability persistently strengthened during 2070-2010 a BP, followed by an overall fluctuating attenuation during 1980-1928 a BP. Then, the trends of rising first before descending twice during 1852-1800 a BP appeared. Furthermore, ENSO activity played a leading role in steering short-term changes in SST seasonality in the northern SCS, manifested as stronger ENSO activity with more frequent El Nino events and decreased SST seasonality. Considering that the frequency of extreme ENSO events may strengthen in the future under global warming, the climate in the northern SCS might become more variable and complex.