Asynchrony of Antarctic and Greenland climate change during the last glacial period
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 r...
| Main Authors: | , , , , , , , , , , |
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| Format: | Text |
| Language: | unknown |
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Macmillan Journals Ltd.
1998
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.48350/158231 https://boris.unibe.ch/158231/ |
| Summary: | 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. |
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