Phase relationships between millennial-scale events 64,000–24,000 years ago
TL;DR: In this paper, a core recovered on the Iberian margin off southern Portugal can be correlated with Greenland ice cores using oxygen isotope variability in planktonic foraminifera which closely matches the ice core records of temperature over Greenland.
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Abstract: A core recovered on the Iberian margin off southern Portugal can be correlated with Greenland ice cores using oxygen isotope variability in planktonic foraminifera which closely matches the ice core records of temperature over Greenland. Our age model identifies the base of every interstadial between 64,000 and 24,000 years ago and uses the Greenland Ice Core Project (GRIP) timescale. The oxygen isotope signal in benthic foraminifera (on this GRIP-based timescale) is quite different from the planktonic record and resembles the temperature record over Antarctica when this is synchronized with Greenland using the record of methane in the atmospheric air in the polar ice cores. We interpret the benthic record as indicating significant fluctuations in ice volume during millennial events, and we suggest that Antarctic temperature changed as a function of ice volume.
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Citations
Atlantic sea surface temperatures estimated from planktonic foraminifera off the Iberian Margin over the last 40 Ka BP
Maria Virgínia Alves Martins,Maria Virgínia Alves Martins,Adriana Rodrigues Perretti,Emilia Salgueiro,Fabrizio Frontalini,João Moreno,António M. Monge Soares,Michel Michaelovitch de Mahiques,Sergio Gomes da Silva,Carlos A. de Azevedo,João Alveirinho Dias +10 more
TL;DR: In this paper, the authors reconstructed sea surface temperatures (SSTs) from planktonic foraminiferal assemblages in two sediment cores off the NW Iberian Continental Margin for the last 40 kyr.
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Palaeohydrological changes over the last 50 ky in the central Gulf of Cadiz:complex forcing mechanisms mixing multi-scale processes
TL;DR: In this paper, Dinoflagellate cyst (dinocyst) analyses were carried out at high resolution in core MD99-2339, retrieved from a contouritic field in the central part of the Gulf of Cadiz, for the Marine Isotope Stage (MIS) 3 interval, allowing for discussion of palaeohydrological changes over the last 50 ky in the subtropical NE Atlantic Ocean.
High resolution climate and environmental changes of the northern Japan (East) Sea for the last 40kyr inferred from sedimentary geochemical and pollen data
Sergey A Gorbarenko,Seung-Il Nam,Yulia V. Rybiakova,Xuefa Shi,Yanguang Liu,Alexander A. Bosin +5 more
TL;DR: In this paper, high-resolution lithological and isotope-geochemical analyses were made on a well-age constrained sediment from the northeastern Japan (East) Sea which recorded 10 dark layers (DL) over the last 40-ka-BP.
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Glacial-to-deglacial reservoir and ventilation ages on the southwest Iberian continental margin
TL;DR: In this paper, the authors used plateau tuning on foraminiferal 14C data from a sediment core retrieved from the ‘Shackleton Sites’, a benchmark region for paleoceanographic studies, to develop a high-resolution record of surface water reservoir ages, estimate raw ventilation ages at two bottom water depths (3150 and 2650 mwd), and establish robust age control for the last 23 ka.
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References
Evidence for general instability of past climate from a 250-kyr ice-core record
Willi Dansgaard,Sigfus J Johnsen,Sigfus J Johnsen,Henrik Clausen,Dorthe Dahl-Jensen,Niels S. Gundestrup,Claus U. Hammer,Christine S. Hvidberg,Jørgen Peder Steffensen,Arny E. Sveinbjörnsdottir,Jean Jouzel,Gerard C. Bond +11 more
TL;DR: In this paper, the authors 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, and find that climate instability was not confined to the last glaciation, but appears also have been marked during the last interglacial (as explored more fully in a companion paper), and during the previous Saale-Holstein glacial cycle.
4.8K
Oxygen isotope and palaeomagnetic stratigraphy of Equatorial Pacific core V28-238: Oxygen isotope temperatures and ice volumes on a 105 year and 106 year scale☆
TL;DR: The core Vema 28-238 as discussed by the authors preserves an excellent oxygen isotope and magnetic stratigraphy and is shown to contain undisturbed sediments deposited continuously through the past 870,000 yr.
2.6K
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.
1.5K
Major features and forcing of high-latitude northern hemisphere atmospheric circulation using a 110,000-year-long glaciochemical series
Paul Andrew Mayewski,L. D. Meeker,Mark S. Twickler,Sallie I. Whitlow,Qinzhao Yang,W. Berry Lyons,Michael L. Prentice +6 more
TL;DR: The Greenland Ice Sheet Project 2 glaciochemical series (sodium, potassium, ammonium, calcium, magnesium, sulfate, nitrate, and chloride) provides a unique view of the chemistry of the atmosphere and the history of atmospheric circulation over both the high latitudes and mid-low latitudes of the northern hemisphere as discussed by the authors.
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