A short circuit in thermohaline circulation: A cause for northern hemisphere glaciation?

被引：159
|
作者：
Driscoll, NW [1 ]
Haug, GH
机构：
[1] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA
[2] Univ Kiel, Forschungszentrum Marine Geowissen, D-24148 Kiel, Germany
来源：
SCIENCE | 1998年 / 282卷 / 5388期
关键词：
D O I：
10.1126/science.282.5388.436
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：
The cause of Northern Hemisphere glaciation about 3 million years ago remains uncertain. Closing the Panamanian Isthmus increased thermohaline circulation and enhanced moisture supply to high Latitudes, but the accompanying heat would have inhibited ice growth. One possible solution is that enhanced moisture transported to Eurasia also enhanced freshwater delivery to the Arctic via Siberian rivers. Freshwater input to the Arctic would facilitate sea ice formation, increase the albedo, and isolate the high heat capacity of the ocean from the atmosphere. It would also act as a negative feedback on the efficiency of the "conveyor belt" heat pump.
引用
收藏
页码：436 / 438
页数：3
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