DOES SEDIMENTARY ORGANIC s(13)C RECORD VARIATIONS IN QUATERNARY OCEAN [CO2 (aq)] ?

被引：125

作者：

Rau, G. H. ^{[1
,2
]}

Froelich, P. N. ^{[3
]}

Takahashi, T. ^{[3
]}

Des Marais, D. J. ^{[2
]}

机构：

[1] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA

[2] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[3] Lamont Doherty Geol Observ, Palisades, NY 10964 USA

来源：

PALEOCEANOGRAPHY | 1991年 / 6卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1029/91PA00321

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Ocean surface water [CO2(aq)] Variations based on glacial/interglacial changesin sediment s(13)C(org) are shown to compare favorably with reconstructions based on ice core [CO2]. In particular, an approximate 80 uatm increase in atmospheric pCO(2) during the last glacial-interglacial transition is calculated to correspond to a 3-4 umolar increase in ocean surface water [CO2(aq)] at atmospheric equilibrium. A widespread marine s(13)C(org) decrease of 1-2 o/oo accomorg panled this event and was not preceded by an equivalent isotopic change in surface water total dissolved inorganic carbon. These observations support the hypothesis that [CO2(aq)] influences photosynthetic isotope fractionation between marine inorganic and organic carbon pools, and therefore that plankton/sediment s(13)C(org) may serve as a proxy for surface water [CO2(aq)].

引用

页码：335 / 347

页数：13

共 46 条

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