Changes in sea surface temperature in western South China Sea over the past 450 ka  

作　　者：LI Li WANG Hui LI JianRu ZHAO MeiXun WANG PinXian 

机构地区：[1]State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

出　　处：《Chinese Science Bulletin》2009年第18期3335-3343,共9页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40403012 and 40621063);Program for Young Excellent Talents in Tongji University (Grant No. 2006KJ055);National Basic Research Program of China (Grant No. 2007CB815904);Shanghai Rising-Star Program (A) (Grant No. 08QA14065)

摘　　要：Sea surface temperature over the past 450 ka was obtained by the unsaturation of molecular fossil-long chain alkenone with a resolution of about 1 ka from the western South China Sea. This is the longest temperature profile in the South China Sea at such high resolution. The U3k7′-SST results revealed similar glacial-interglacial cycles as the δ18O profile of planktonic foraminifera, with SST variability of 23―25.5℃ for glacial and 25―28℃ for interglacial periods. The highest SST (28.4℃) was recorded at MIS5.5 and lowest SST (22.6℃) during MIS2. The SST record preceded the planktonic foraminiferal δ18O on five glacial-interglacial transitions. Comparison of temperature records from the Southern and Northern Hemispheres indicated a more Southern Hemisphere-like pattern for the temperature variation in the SCS. Strong precession and semiprecession signals in the spectra of our SST record manifest the tropical phenomena.Sea surface temperature over the past 450 ka was obtained by the unsaturation of molecular fossil-long chain alkenone with a resolution of about 1 ka from the western South China Sea. This is the longest temperature profile in the South China Sea at such high resolution. The U37^κ-SST results revealed similar glacial-interglacial cycles as the δ^18O profile of planktonic foraminifera, with SST variability of 23-25.5℃ for glacial and 25-28℃ for interglacial periods. The highest SST （28.4℃） was recorded at MIS5.5 and lowest SST （22.6℃） during MIS2. The SST record preceded the planktonic foraminiferal δ^18O on five glacial-interglacial transitions. Comparison of temperature records from the Southern and Northern Hemispheres indicated a more Southern Hemisphere-like pattern for the temperature variation in the SCS. Strong precession and semiprecession signals in the spectra of our SST record manifest the tropical phenomena.

关 键 词：华南西部 海表温度 中国 浮游有孔虫 海温变化 海上 间冰期 表面温度 

分 类 号：P444[天文地球—大气科学及气象学] P732.6