Time scale and ice accumulation during the last 125,000 years is indicated by Greenland O18 curve
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چکیده
منابع مشابه
Sea Ice and Dynamical Controls on Preindustrial and Last Glacial Maximum Accumulation in Central Greenland
Greenland has experienced large changes since the last glacial with its summit warming by approximately 218C, average accumulation rates tripling, and annual amplitudes of temperature and accumulation seemingly declining. The altered seasonal cycle of accumulation has been attributed to a combination of the large-scale dynamical response of the North Atlantic storm track to surface boundary con...
متن کاملGreenland—Antarctic phase relations and millennial time-scale climate fluctuations in the Greenland ice-cores
The Greenland (GRIP/GISP2) and Antarctic (Byrd) ice-cores are examined in the frequency domain, with the data synchronized using common methane variations. Using conventional time-series analysis, a simple picture emerges: there is low-frequency (periods longer than about 10 kyr) coherence between the two records, consistent with a simple time delay, Antarctica leading by 1– 2 kyr: Two geograph...
متن کاملAsynchronous instability of the North American-Arctic and Greenland ice sheets during the last deglaciation
The chronology of deglacial meltwater pulses from the Laurentide Ice Sheet is well documented. However, the deglacial history of the North American-Arctic (north-eastern Laurentide and Innuitian) and western Greenland ice sheets draining into the Labrador Sea via Baffin Bay is less well constrained. Here we present new high-resolution, radiocarbon-dated records from the central Baffin Bay spann...
متن کاملBe ages from central east Greenland constrain the extent of the Greenland ice sheet during the Last Glacial Maximum
Traditional ice sheet reconstructions have suggested two distinctly different ice sheet regimes along the East Greenland continental margin during the Last Glacial Maximum (LGM): ice to the shelf break south of Scoresby Sund and ice extending no further than to the inner shelf at and north of Scoresby Sund. We report new Be ages from erratic boulders perched at 250ma.s.l. on the Kap Brewster pe...
متن کاملDiachronous retreat of the Greenland ice sheet during the last deglaciation
The last deglaciation is the most recent interval of large-scale climate change that drove the Greenland ice sheet from continental shelf to within its present extent. Here, we use a database of 645 published 10Be ages from Greenland to document the spatial and temporal patterns of retreat of the Greenland ice sheet during the last deglaciation. Following initial retreat of its marine margins, ...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1973
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800047373