地球科学进展 ›› 1997, Vol. 12 ›› Issue (3): 284 -289. doi: 10.11867/j.issn.1001-8166.1997.03.0284

全球变化研究 上一篇    下一篇

U 37 K与海水表层温度
龚庆杰,吴时国,罗又郎   
  1. 中国科学院南海海洋研究所
  • 收稿日期:1996-07-02 修回日期:1996-09-07 出版日期:1997-06-01
  • 通讯作者: 龚庆杰,男,1971年12月生,硕士研究生,主要从事海洋生物地球化学研究.

37 :IMPLICATION FOR STUDY OF SEA SURFACE TEMPERATURE

GONG Youjie, WU Shiguo, LUO Youlang   

  1. South China Sea Institute of Oceanology,Academia Sinica,Guangzhou  510301
  • Received:1996-07-02 Revised:1996-09-07 Online:1997-06-01 Published:1997-06-01

37是指少数藻类生物所特有的一种分子化合物(长链不饱和酮)的不饱和指数。在现代海洋沉积物中,U37与浮游有孔虫的18O值具有很好的相关性。在实验室培养的藻类生物体中、海洋悬浮颗粒物及海洋沉积柱样的表层样中均检测出长链不饱和酮,其U37与生物生长环境的海水表层温度具有很好的线性关系。因此,在古气候研究中,U37可作为一种有效的古温度指标,且在古气候研究中已得到应用。主要介绍了U37作为海水表层温度指标的原理、定量公式及其研究现状和存在的问题。

37is a ratio index of long-chain unsaturated alkenone,synthesized by a group of prymnesiophyte algae,most notably the coccolithophorid Emiliania huxleyi,which is ubiquitous in pelagic marine sediments from quaternary to cretaceous period. U37has a intimate relation with planktonic foraminifera's 8180 in marine sediments. Laboratory culture,marine particulate,and sediment core top studies have indicated that U37is closely related to sea surface temperature. so it is regarded as an index of paleotemperature in paleoclimatic studies and has been applied to estimate SST in cores from organic-rich depositional environments at low latitudes,which can also compensate for the foraminifera's δ18O defects in calculating paleotemperatures in marine sediments under the CCD.
    This paper mainly introduces the theory of SST index:U37,the U37-T °C equation and their researches and problems in current studies.

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