Oxygen-18 of O2 Records the Impact of Abrupt Climate Change on the Terrestrial Biosphere

被引：128

作者：

Severinghaus, Jeffrey P. ^{[1
]}

Beaudette, Ross ^{[1
]}

Headly, Melissa A. ^{[1
]}

Taylor, Kendrick ^{[2
]}

Brook, Edward J. ^{[3
]}

机构：

[1] Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92093 USA

[2] Nevada Syst Higher Educ, Desert Res Inst, Reno, NV 89512 USA

[3] Oregon State Univ, Dept Geosci, Corvallis, OR 97331 USA

来源：

SCIENCE | 2009年 / 324卷 / 5933期

关键词：

MILLENNIAL-SCALE; ASIAN MONSOON; ISOTOPIC COMPOSITION; ATMOSPHERIC OXYGEN; HIGH-RESOLUTION; GREENLAND; ANTARCTICA; FRACTIONATION; HOLOCENE; OCEAN;

D O I：

10.1126/science.1169473

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：

Photosynthesis and respiration occur widely on Earth's surface, and the O-18/O-16 ratio of the oxygen produced and consumed varies with climatic conditions. As a consequence, the history of climate is reflected in the deviation of the O-18/O-16 of air (delta O-18(atm)) from seawater delta O-18 (known as the Dole effect). We report variations in delta O-18(atm) over the past 60,000 years related to Heinrich and Dansgaard-Oeschger events, two modes of abrupt climate change observed during the last ice age. Correlations with cave records support the hypothesis that the Dole effect is primarily governed by the strength of the Asian and North African monsoons and confirm that widespread changes in low-latitude terrestrial rainfall accompanied abrupt climate change. The rapid delta O-18(atm) changes can also be used to synchronize ice records by providing global time markers.

引用

页码：1431 / 1434

页数：4

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