Mediterranean Sea surface radiocarbon reservoir age changes since the last glacial maximum

被引:253
作者
Siani, G
Paterne, M
Michel, E
Sulpizio, R
Sbrana, A
Arnold, M
Haddad, G
机构
[1] CNRS, Lab Sci Climat & Environm, F-91118 Gif Sur Yvette, France
[2] CNRS, Unite Mixte Serv, F-91118 Gif Sur Yvette, France
[3] CNR, Ctr Studio Geol Strutturale & Dinam Appennino, I-56126 Pisa, Italy
[4] CNR, Dipartimento Sci Terra, I-56126 Pisa, Italy
[5] TotalFina Elf, Ctr Sci Jean Feger, F-64018 Pau, France
关键词
D O I
10.1126/science.1063649
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
Sea surface reservoir ages must be known to establish a common chronological framework for marine, continental, and cryospheric paleoproxies, and are crucial for understanding ocean-continent climatic relationships and the paleoventilation of the ocean. Radiocarbon dates of planktonic foraminifera and tephra contemporaneously deposited over Mediterranean marine and terrestrial regions reveal that the reservoir ages were similar to the modern one (similar to 400 years) during most of the past 18,000 carbon-14 years. However, reservoir ages increased by a factor of 2 at the beginning of the last deglaciation. This is attributed to changes of the North Atlantic thermohaline circulation during the massive ice discharge event Heinrich 1.
引用
收藏
页码:1917 / 1920
页数:4
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