U
  <sub>37</sub>
  <sup>K</sup>与海水表层温度

doi:10.11867/j.issn.1001-8166.1997.03.0284

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

U ₃₇ ^K与海水表层温度

龚庆杰,吴时国,罗又郎

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.

Ｕ ₃₇ ^Ｋ:IMPLICATION FOR STUDY OF SEA SURFACE TEMPERATURE

GONG Youjie, WU Shiguo, LUO Youlang

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

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Ｕ₃₇^Ｋ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^Ｋ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^Ｋ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^Ｋ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^Ｋ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。

关键词: Ｕ₃₇^Ｋ, 海水表层温度, 古温度

Ｕ₃₇^Ｋis 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. Ｕ₃₇^Ｋhas a intimate relation with planktonic foraminifera's 8180 in marine sediments. Laboratory culture，marine particulate，and sediment core top studies have indicated that Ｕ₃₇^Ｋis 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^Ｋ,the Ｕ₃₇^Ｋ-T °C equation and their researches and problems in current studies.

Key words: Ｕ₃₇^Ｋ, SST, Paleotemperature.

中图分类号:

P731.11/P736.4

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Ｕ 37 Ｋ:IMPLICATION FOR STUDY OF SEA SURFACE TEMPERATURE

Ｕ ₃₇ ^Ｋ:IMPLICATION FOR STUDY OF SEA SURFACE TEMPERATURE