The polar ocean and glacial cycles in atmospheric CO2 concentration

被引：632

作者：

Sigman, Daniel M. ^{[1
]}

Hain, Mathis P. ^{[1
,2
]}

Haug, Gerald H. ^{[2
,3
]}

机构：

[1] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA

[2] Univ Potsdam, Inst Geosci, DFG Leibniz Ctr Earth Surface Proc & Climate Stud, D-14476 Potsdam, Germany

[3] ETH, Dept Earth Sci, Inst Geol, CH-8092 Zurich, Switzerland

来源：

NATURE | 2010年 / 466卷 / 7302期

关键词：

ANTARCTIC SEA-ICE; SOUTHERN-OCEAN; CARBON-CYCLE; RADIOCARBON AGES; CLIMATE; TEMPERATURE; IRON; STRATIFICATION; PACIFIC; PRODUCTIVITY;

D O I：

10.1038/nature09149

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Global climate and the atmospheric partial pressure of carbon dioxide (p(CO2atm)) are correlated over recent glacial cycles, with lower p(CO2atm) during ice ages, but the causes of the p(CO2atm) changes are unknown. The modern Southern Ocean releases deeply sequestered CO2 to the atmosphere. Growing evidence suggests that the Southern Ocean CO2 'leak' was stemmed during ice ages, increasing ocean CO2 storage. Such a change would also have made the global ocean more alkaline, driving additional ocean CO2 uptake. This explanation for lower ice-age p(CO2atm), if correct, has much to teach us about the controls on current ocean processes.

引用

页码：47 / 55

页数：9

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