文献类型：期刊文献

英文题名：Asian monsoonal temperature and environmental changes since the penultimate deglaciation as revealed by alkenones and alkanes in sediments from the northern South China Sea

作者：Chen, Guosheng[1];Peng, Shiyun[1,2];Tsai, Hung-Ling[3,4,5];Kong, Deming[1,2];Chen, Min-Te[3,4,5];Wei, Gangjian[6];Song, Zhiguang[1]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Shenzhen Res Inst, Shenzhen 518108, Peoples R China;[3]Natl Taiwan Ocean Univ, Inst Earth Sci, Keelung 202, Taiwan;[4]Natl Taiwan Ocean Univ, Ctr Excellence Oceans, Keelung 202, Taiwan;[5]Natl Taiwan Ocean Univ, Ctr Excellence Ocean Engn, Keelung 202, Taiwan;[6]Chinese Acad Sci, CAS Key Lab Marginal Sea Geol, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China

年份：2024

卷号：270

外文期刊名：JOURNAL OF ASIAN EARTH SCIENCES

收录：SCI-EXPANDED(收录号：WOS:001249808700001)、、Scopus(收录号：2-s2.0-85195032975)、WOS

基金：This work was funded by the National Key Research and Develop-ment Program of China (2018YFA0605601) , Doctoral Research Initia-tion Project of Guangdong Ocean University (R17011, 060302032101) , Guangdong Provincial College Innovation Team Project (2019KCXTF021) and Special Talent Support Program of Guangdong Ocean University (R17001) .

语种：英文

外文关键词：SST; Alkenone; Alkane; South China Sea; Termination; Penultimate deglaciation

外文摘要：A new alkenone sea surface temperature (SST) record from the South China Sea (SCS) over the last 170 ka has been reported here. Our analysis of magnetic susceptibility and AMS 14C dating on the top portion of the core suggests that this record dates to the Marine Isotope Stage (MIS) 6. As indicated in Termination I and II, SST changes are correlated with clear glacial/interglacial cycles and likely dominated by atmospheric CO2 and Western Pacific Warm Pool temperature changes. But the two Terminations were different in magnitude. In Termination I, the minimum and maximum SSTs are 24.5 degrees C and 27.5 degrees C, respectively, showing a smaller rise (3 degrees C) than in Termination II (24-28.3 degrees C). The n-alkane indices, such as average chain length (ACL) and carbon preference index (CPI), exhibited high/low values during glacial/interglacial periods, and possible more arid climate during MIS 6 than MIS 2. During Termination II, the maximum surface warming in the SCS is accompanied by a progressive lag of approximately 7000 years in relation to maximum summer insolation until Termination I, when they are nearly synchronous. According to the study, SSTs are continuously changing and are influenced by solar insolation, global ice volume changes, and ocean-atmosphere interactions across hemispheres.