期刊
GEOLOGY
卷 33, 期 11, 页码 873-876出版社
GEOLOGICAL SOC AMER, INC
DOI: 10.1130/G21790.1
关键词
clathrates; global warming; Denmark strait overflow; Heinrich events
类别
A core transect across the southwestern Greenland Sea reveals coeval events of extremely negative planktic and benthic delta C-13 excursions between 40 and 87 ka. The most pronounced event, event 1, began at peak Dansgaard-Oeschger stadial 22 (85 ka) with a duration of 18 k.y. During this episode, incursions of Atlantic Intermediate Water caused a bottom-water warming of up to 8 degrees C. The amplitude, timing, and geographic pattern of the delta C-13 events suggest that this bottom-water warming triggered clathrate instability along the East Greenland slope and a methane-induced depletion of delta C-13(DIC) (DIC-dissolved inorganic carbon). Since delta C-13 event 1 matches a major peak in atmospheric CH4 concentration, this clathrate destabilization may have contributed to the rise in atmospheric CH4 and thus to climate warming over marine isotope stage 5.1.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据