Evidence from giant-clam delta O-18 of intense El Nino-Southern Oscaillation-related variability but reduced frequency 3700 years ago | |
Hu, Yue1,2; Sun, Xiaoming1,2,3,4; Cheng, Hai5,6; Yan, Hong7,8,9 | |
2020-04-01 | |
发表期刊 | CLIMATE OF THE PAST |
ISSN | 1814-9324 |
卷号 | 16期号:2页码:597-610 |
摘要 | Giant clams (Tridacna) are the largest marine bivalves, and their carbonate shells can be used for highr-esolution paleoclimate reconstructions. In this contribution, delta O-18(shell) was used to estimate climatic variation in the Xisha Islands of the South China Sea. We first evaluate sea surface temperature (SST) and sea surface salinity (SSS) influence on the modern resampled monthly (r -monthly) resolution of Tridacna gigas delta O-18(shell). The results obtained reveal that delta(18)O(shell )seasonal variation is mainly controlled by SST and appears to be insensitive to local SSS change. Thus, the delta O-18 of Tridacna shells can be roughly used as a proxy of local SST: a 1 parts per thousand delta O-18(shell ) change is roughly equal to 4.41 degrees C of SST. The r -monthly delta O-18 of a 40-year-old Tridacna squamosa (3673 +/- 28 BP) from the North Reef of the Xisha Islands was analyzed and compared with the modern specimen. The difference between the average delta O-18 of the fossil Tridacna shell (delta O-18 = -1.34 %0) and the modern Tridacna specimen (delta O-18= -1.15 %0) probably implies a warm climate, roughly 0.84 degrees C, 3700 years ago. The seasonal variation 3700 years ago was slightly lower than that suggested by modern instrumental data, and the transition between warm and cold seasons was rapid. Higher amplitudes of reconstructed r -monthly and r -annual SST anomalies imply an enhanced climate variability during this warm period. Investigation of the El NinO-Southern Oscillation (ENSO) variation (based on the reconstructed SST series) indicates reduced ENSO frequency but increased ENSO-related variability and extreme El NinO winter events 3700 years ago. |
DOI | 10.5194/cp-16-597-2020 |
关键词[WOS] | TRIDACNA-GIGAS BIVALVES ; PORITES-LUTEA CORALS ; 4.2 KA EVENT ; CHINA SEA ; CLIMATE VARIABILITY ; LEIZHOU PENINSULA ; ENSO VARIABILITY ; REEF ENVIRONMENT ; STABLE-ISOTOPES ; OXYGEN-ISOTOPE |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Key R&D Program of China[2018YFA0702605] ; National Nature Science Foundation of China[41876038] ; National Nature Science Foundation of China[41877399] ; National Nature Science Foundation of China[91128101] ; National Nature Science Foundation of China[41888101] ; State Key Laboratory for Mineral Deposits Research in Nanjing University[20-15-07] ; Chinese Academy of Sciences[QYZDB-SSW-DQC001] ; Qingdao National Laboratory for Marine Science and Technology of China[QNLM2016ORP0202] ; National 13th Five Year Plan project[DY135-R2-1-01] ; National 13th Five Year Plan project[DY135-C1-1-06] |
WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences |
项目资助者 | National Key R&D Program of China ; National Nature Science Foundation of China ; State Key Laboratory for Mineral Deposits Research in Nanjing University ; Chinese Academy of Sciences ; Qingdao National Laboratory for Marine Science and Technology of China ; National 13th Five Year Plan project |
WOS类目 | Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
WOS记录号 | WOS:000522843400001 |
出版者 | COPERNICUS GESELLSCHAFT MBH |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/12523 |
专题 | 古环境研究室 第四纪科学与全球变化卓越创新中心 |
通讯作者 | Sun, Xiaoming |
作者单位 | 1.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510006, Peoples R China 2.Guangdong Prov Key Lab Marine Resources & Coastal, Guangzhou 510275, Peoples R China 3.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China 5.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710054, Peoples R China 6.Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA 7.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 8.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 9.Qingdao Natl Lab Marine Sci & Technol, OCCES, Qingdao 266061, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Yue,Sun, Xiaoming,Cheng, Hai,et al. Evidence from giant-clam delta O-18 of intense El Nino-Southern Oscaillation-related variability but reduced frequency 3700 years ago[J]. CLIMATE OF THE PAST,2020,16(2):597-610. |
APA | Hu, Yue,Sun, Xiaoming,Cheng, Hai,&Yan, Hong.(2020).Evidence from giant-clam delta O-18 of intense El Nino-Southern Oscaillation-related variability but reduced frequency 3700 years ago.CLIMATE OF THE PAST,16(2),597-610. |
MLA | Hu, Yue,et al."Evidence from giant-clam delta O-18 of intense El Nino-Southern Oscaillation-related variability but reduced frequency 3700 years ago".CLIMATE OF THE PAST 16.2(2020):597-610. |
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