Book ChapterDOI
Past Accumulation rates derived from observed annual layers in the GRIP ice core from Summit, Central Greenland
Dorthe Dahl-Jensen,Sigfus J Johnsen,Claus U. Hammer,Henrik Clausen,Jean Jouzel +4 more
- pp 517-532
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TLDR
In this paper, an ice flow model was developed based on dated reference horizons down to 1623 m. The model was used to reconstruct past accumulation rates from the sequences of detected annual layers in the upper 2321 m of the 3029 m deep GRIP ice core.Abstract:
Based on dated reference horizons down to 1623 m an ice flow model has been developed. The model is used to reconstruct past accumulation rates from the sequences of detected annual layers in the upper 2321 m of the 3029 m deep GRIP ice core. Comparison of these past time accumulation rates with the corresponding δ 18O values show a strong correlation. This relationship can be used in a non steady state flow model, in which past accumulation rates, deduced from the continuous δ 18O record, are used to model a time scale. The hereby determined time scale and the modelled annual layers compare well with the observed data.read more
Citations
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Journal ArticleDOI
A new Greenland ice core chronology for the last glacial termination
Sune Olander Rasmussen,Katrine Krogh Andersen,Anders Svensson,Jørgen Peder Steffensen,Bo Møllesøe Vinther,Henrik Clausen,Marie-Louise Siggaard-Andersen,Marie-Louise Siggaard-Andersen,Sigfus J Johnsen,L. B. Larsen,Dorthe Dahl-Jensen,M. Bigler,M. Bigler,Regine Röthlisberger,Regine Röthlisberger,Hubertus Fischer,Kumiko Goto-Azuma,Margareta Hansson,Urs Ruth +18 more
TL;DR: In this paper, a new common stratigraphic timescale for the North Greenland Ice Core Project (NGRIP) and GRIP ice cores is presented, which covers the period 7.9-14.8 kyr before present and includes the Bolling, Allerod, Younger Dryas, and early Holocene periods.
Journal ArticleDOI
The Younger Dryas cold interval as viewed from central Greenland
TL;DR: Greenland ice-core records provide an exceptionally clear picture of many aspects of abrupt climate changes, and particularly of those associated with the Younger Dryas event, as reviewed here as mentioned in this paper.
Journal ArticleDOI
Asynchrony of Antarctic and Greenland climate change during the last glacial period
Thomas Blunier,Jérôme Chappellaz,Jakob Schwander,A. Dällenbach,Bernhard Stauffer,Thomas F. Stocker,Dominique Raynaud,Jean Jouzel,Henrik Clausen,Claus U. Hammer,Sigfus J Johnsen,Sigfus J Johnsen +11 more
TL;DR: 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 as mentioned in this paper.
Journal ArticleDOI
Dust sources and deposition during the last glacial maximum and current climate: A comparison of model results with paleodata from ice cores and marine sediments
Natalie M. Mahowald,Karen E. Kohfeld,Margaret Hansson,Yves Balkanski,Sandy P. Harrison,I. Colin Prentice,Michael Schulz,Henning Rodhe +7 more
TL;DR: In this article, the authors used linked terrestrial biosphere, dust source, and atmospheric transport models to simulate the dust cycle in the atmosphere for current and last glacial maximum (LGM) climates.
References
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Journal ArticleDOI
Irregular glacial interstadials recorded in a new Greenland ice core
Sigfus J Johnsen,Sigfus J Johnsen,Henrik Clausen,Willi Dansgaard,K. Fuhrer,Niels S. Gundestrup,Claus U. Hammer,Peter Iversen,Jean Jouzel,Bernhard Stauffer,Jørgen Peder Steffensen +10 more
TL;DR: In this paper, the authors present results from a new deep ice core drilled at the summit of the Greenland ice sheet, where the depositional environ-ment and the flow pattern of the ice are close to ideal for core recovery and analysis.
Journal ArticleDOI
Greenland ice sheet evidence of post-glacial volcanism and its climatic impact
TL;DR: This paper showed that clustered volcanic eruptions have a considerable cooling effect on climate, which further complicates climatic predictions, and used a temperature index to measure the cooling effect of volcanic activity.
Journal ArticleDOI
A 150,000-year climatic record from Antarctic ice
C. Lorius,Jean Jouzel,Catherine Ritz,Liliane Merlivat,Nartsiss I. Barkov,Y. S. Korotkevich,V. M. Kotlyakov +6 more
TL;DR: In this article, a new climatic-time series for the past 150 kyr was obtained using δ18 O data from an Antarctic ice core, which was used to reconstruct the last interglacial, the last glacial and the present holocene interglastic.
Journal ArticleDOI
The origin of Arctic precipitation under present and glacial conditions
TL;DR: In this article, a model for d values in Greenland precipitation is developed on the basis of Rayleigh condensation/sublimation with due account taken of kinetic effects during both evaporation of sea water and sublimation.
Journal ArticleDOI
A 30,000-yr isotope climatic record from Antarctic ice
TL;DR: In this paper, simple glaciological conditions at Dome C in east Antarctica have made possible a more detailed and accurate interpretation of an ice core to 950 m depth spanning some 32,000 yr than that obtained from earlier ice cores.