新学科·新技术·新发现

古海洋、古气候研究的新工具——分子温度计

展开
  • 国家海洋局第二海洋研究所 杭州 310012
陈建芳,男,1968年9月出生,助理研究员,主要从事海洋有机地球化学与古海洋研究。

收稿日期: 1995-09-25

  修回日期: 1995-12-26

  网络出版日期: 1996-07-01

基金资助

中德政府间海洋科技合作项目“南海海洋沉积作用过程与地球化学研究”。

MOLECULAR THERMOMETER:A NEW TOOL FOR STUDIES OF PALEOCEANOGRAPHY AND PALEOCLIMATE

Expand
  • Second Institute of Oceanography, SOA, Hangzhou 310012

Received date: 1995-09-25

  Revised date: 1995-12-26

  Online published: 1996-07-01

摘要

 “分子温度计”是通过有机地球化学方法获得的沉积物中烯酮化合物的相对丰度来估算古海水表面温度的。烯酮化合物的不饱和度(U37)与其生物母源Emiliania huxleyi的生长温度密切相关,同时这种信息不受有机质溶解与成岩作用影响,而能较完整地保存于海洋沉积物中,因而通过它能很好地反映古海洋与古气候的演变。这种方法不受盐度、上升流与极地冰盖变化等因素影响,尤其适用于碳酸盐贫乏海区的古海洋与古气候研究。

本文引用格式

陈建芳,郑连福 . 古海洋、古气候研究的新工具——分子温度计[J]. 地球科学进展, 1996 , 11(4) : 404 -408 . DOI: 10.11867/j.issn.1001-8166.1996.04.0404

Abstract

Molecular thermometer, known as Uk37 index, is used to estimate sea surface temperature (SST) based on unsaturation ration of long chain ketone in marine sediments. The production ratio of alkenones of the oceanic coccolithophrid Emiliania hyxleyi is linarly correlated with their growth temperature, and there is no alteration for this ratio during sedimentation and burial, so it is a good indicator for studies of paleoceanography and paleoclimate. This method is not affected by salinity, upwilling and polar ice volumn, so it extends the range of paleoclimatic studies to regions with carbonate poor sediments where any foraminiferal analyses are not possible.

参考文献

[1]业治铮,汪品先.南海晚第四纪古海洋研究.青岛:青岛海洋人学出版社,1992. 3- 8.
[2]同济大学海洋地质系.古海洋学概论.上海:同济大学出版社,1989.315.
[3]Sires E L, Keigwin L D.  Equatorial Atlantic sea surface temperature for the last 30 kyr:  A comparison of Uk37, δ18O and foraminiferal assemblage temperature estimate.  Paleoceanography,  1994, 9(1):31-45.
[4]Fairbanks R C, Mathews R K. The marine oxygen isotope record in Pleistocene coral, Barbads,West Indies.  Quat Res N Y,  1978,  10: 181-196.
[5]Eglinton C,  Parks R J, Zhao M.Lipid biomarkers in biogeochemistry:  Future role?Marine Geology, 1993, 113:114- 145.
[6]Repeta D J,  Eglinton C and Lee C.M urine organic geochemistry-window to the past. Oceanus,  1992,  35: 38-46.
[7]Farrington J W(editor).Murine geochemistry:  Review and challenges for the future.  Murine Chemistry(special issue},1992, 39(1-3):1-242.
[8]Leeuw J W,Meer F W,Schenli P A.On the occurence and structure indentification of long-chain ketones and hydrocarbons in recent and subrecent sediments.  In:  Advances in Organic Geochemistry  1979.  Oxford: Pergamon Press,  1980. 211-217.
[9]Volkman J K,  Eglinton C,  Corner E D S, et al.  Long-chain all}enes and all}enones in the marine cocolithophorid Emiliania huxleyi.  In:  Advances in Organic Geochemistry 1979. Oxford:  Pergamon Press,1980. 219- 227.
[10] Marlowe I T,Brassell S C, Eglinton C, et al.  Long-chain unsaturated l}etone and esters in living algae and marine sediments.  Org Ceochem,  1984, 6:  135-141.
[11]Volkman J K, Allen D I,  Stevenson P L, et al.  Becterial and algal hydrocarbons in sediments from a saline Antarctic lake,  Ace lake.  In:  Advances in Organic Geochemistry 1985. Oxford:  Pergamon Press,  1986. 671-681.
[12]Cran well P A.Long-chain unsaturated ketones in recent lacustrine sediments.  Ceochim Cosmochim Acta,  1985, 49: 1545-1551.
[13]Marlowe I T.Lipids as paleoclimatic indicators.  Ph D thesis,  University of Bristol, U K,  1984.
[14]Brassel S C,  Eglinton C,  Marlowe I T,et al.  Molecular stratigraphy:  A new tool for climatic assessment.  Nature, 1986,320: 129- 133.
[15]Prahl F G, Walieham S C.Calibration of unsaturation patterns in long-chain ketone compositions for paleotem perature assessment.  Nature,  1987,  330:  367-3 69.
[16]Prahl F C,  Muehlhausen L A, Zahnle D L.Further evaluation of long-chain alkenones as indicators of paleoceanographic conditions.  Ceochim Cosmochim Acta,  1988, 52: 2303-2310.
[17]Kennedv J A, Brassell S C.  Molecular stratigraphy of Santa Barbara Basin:  Comparison with historical records of annual climate change.  Org Ceochim,  1992,  19( 1-3):235-248.
[18]Eglinton G, Come M,Rosell A, et al.  UK secular geochemical records of the last 400, 000 years. In:  Abstract of Fourth International Conference on Paleoceanography.  1992,  University of Kiel,  Germany.
[19]叶笃正(主编).中国的全球变化预研究.北京:气象出版社,1992.101.
[20]Volliman J K,  Barren S M,Blacburn S I, et al.  Alkenones in Cephrocapsa oceanic: Implications for studies of paleoclimate.  Geochim Gosmochim Acta,  1995, 59( 3):513-520.

文章导航

/