Asynchrony of Antarctic and Greenland climate change during the last glacial period
Asynchrony of Antarctic and Greenland climate change during the last glacial period
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DOI：
10.1038/29447
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发表时间：
1998-08-20
期刊：
影响因子：
64.8
通讯作者：
Johnsen, SJ
中科院分区：
文献类型：
--
作者：
Blunier, T;Chappellaz, J;Johnsen, SJ
气候动力学的一个核心问题是了解北方和南半球在气候事件中是如何耦合的。在末次冰期格陵兰观测到的最强烈的快速温度变化（所谓的Dansgaard-Oeschger事件）与南极洲的温度记录类似。比较南极洲和格陵兰冰芯记录的全球大气甲烷浓度，可以确定这些温度变化的相位关系（超前或滞后）。格陵兰岛在距今36和45万年前的变暖事件比南极洲的变暖事件晚了1万年多。平均而言，在距今47-23 kyr期间，南极气候变化领先格陵兰1-2.5 kyr。
A central issue in climate dynamics is to understand how the Northern and Southern hemispheres are coupled during climate events. The strongest of the fast temperature changes observed in Greenland (so-called Dansgaard-Oeschger events) during the last glaciation have an analogue in the temperature record from Antarctica. A comparison of the global atmospheric concentration of methane as recorded in ice cores from Antarctica and Greenland permits a determination of the phase relationship (in leads or lags) of these temperature variations. Greenland warming events around 36 and 45 kyr before present lag their Antarctic counterpart by more than 1 kyr. On average, Antarctic climate change leads that of Greenland by 1-2.5 kyr over the period 47-23 kyr before present.