Evidence for general instability of past climate from a 250-KYR ice-core record
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Evidence for general instability of past climate from a 250-KYR ice-core record. / Johnsen, Sigfus Johann; Clausen, Henrik Brink; Dahl-Jensen, Dorthe; Hammer, Claus Uffe; Hvidberg, Christine Schøtt; Steffensen, Jørgen Peder; Dansgaard, W.; Gundestrup, NS.; Sveinbjornsdottir, AE; Jouzel, J.; Bond, G.
In: Nature, Vol. 364, 1993, p. 218-220.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Evidence for general instability of past climate from a 250-KYR ice-core record
AU - Johnsen, Sigfus Johann
AU - Clausen, Henrik Brink
AU - Dahl-Jensen, Dorthe
AU - Hammer, Claus Uffe
AU - Hvidberg, Christine Schøtt
AU - Steffensen, Jørgen Peder
AU - Dansgaard, W.
AU - Gundestrup, NS.
AU - Sveinbjornsdottir, AE
AU - Jouzel, J.
AU - Bond, G.
PY - 1993
Y1 - 1993
N2 - results1,2 from two ice cores drilled in central Greenland have revealed large, abrupt climate changes of at least regional extent during the late stages of the last glaciation, suggesting that climate in the North Atlantic region is able to reorganize itself rapidly, perhaps even within a few decades. Here we present a detailed stable-isotope record for the full length of the Greenland Ice-core Project Summit ice core, extending over the past 250 kyr according to a calculated timescale. We find that climate instability was not confined to the last glaciation, but appears also to have been marked during the last interglacial (as explored more fully in a companion paper3) and during the previous Saale-Holstein glacial cycle. This is in contrast with the extreme stability of the Holocene, suggesting that recent climate stability may be the exception rather than the rule. The last interglacial seems to have lasted longer than is implied by the deep-sea SPECMAP record4, in agreement with other land-based observations5,6. We suggest that climate instability in the early part of the last interglacial may have delayed the melting of the Saalean ice sheets in America and Eurasia, perhaps accounting for this discrepancy Udgivelsesdato: 15 juli
AB - results1,2 from two ice cores drilled in central Greenland have revealed large, abrupt climate changes of at least regional extent during the late stages of the last glaciation, suggesting that climate in the North Atlantic region is able to reorganize itself rapidly, perhaps even within a few decades. Here we present a detailed stable-isotope record for the full length of the Greenland Ice-core Project Summit ice core, extending over the past 250 kyr according to a calculated timescale. We find that climate instability was not confined to the last glaciation, but appears also to have been marked during the last interglacial (as explored more fully in a companion paper3) and during the previous Saale-Holstein glacial cycle. This is in contrast with the extreme stability of the Holocene, suggesting that recent climate stability may be the exception rather than the rule. The last interglacial seems to have lasted longer than is implied by the deep-sea SPECMAP record4, in agreement with other land-based observations5,6. We suggest that climate instability in the early part of the last interglacial may have delayed the melting of the Saalean ice sheets in America and Eurasia, perhaps accounting for this discrepancy Udgivelsesdato: 15 juli
U2 - 10.1038/364218a0
DO - 10.1038/364218a0
M3 - Journal article
VL - 364
SP - 218
EP - 220
JO - Nature
JF - Nature
SN - 0028-0836
ER -
ID: 9973798