A refined TALDICE-1a age scale from 55 to 112 ka before present for the Talos Dome ice core based on high-resolution methane measurements

被引：19

作者：

Schuepbach, S. ^{[1
,2
]}

Federer, U. ^{[1
,2
]}

Bigler, M. ^{[1
,2
]}

Fischer, H. ^{[1
,2
]}

Stocker, T. F. ^{[1
,2
]}

机构：

[1] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland

[2] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland

来源：

CLIMATE OF THE PAST | 2011年 / 7卷 / 03期

基金：

瑞士国家科学基金会;

关键词：

CLIMATE-CHANGE; ATMOSPHERIC METHANE; NITROUS-OXIDE; GREENLAND ICE; FIRN; CH4; SYNCHRONIZATION; ANTARCTICA; RECORDS; AIR;

D O I：

10.5194/cp-7-1001-2011

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A precise synchronization of different climate records is indispensable for a correct dynamical interpretation of paleoclimatic data. A chronology for the TALDICE ice core from the Ross Sea sector of East Antarctica has recently been presented based on methane synchronization with Greenland and the EDC ice cores and delta O-18(ice) synchronization with EDC in the bottom part (TALDICE-1). Using new high-resolution methane data obtained with a continuous flow analysis technique, we present a refined age scale for the age interval from 55-112 thousand years (ka) before present, where TALDICE is synchronized with EDC. New and more precise tie points reduce the uncertainties of the age scale from up to 1900 yr in TALDICE-1 to below 1100 yr over most of the refined interval and shift the Talos Dome dating to significantly younger ages during the onset of Marine Isotope Stage 3. Thus, discussions of climate dynamics at sub-millennial time scales are now possible back to 110 ka, in particular during the inception of the last ice age. Calcium data of EDC and TALDICE are compared to show the impact of the refinement to the synchronization of the two ice cores not only for the gas but also for the ice age scale.

引用

页码：1001 / 1009

页数：9

共 33 条

[1] One-to-one coupling of glacial climate variability in Greenland and Antarctica [J].

Barbante, C. ;

Barnola, J. -M. ;

Becagli, S. ;

Beer, J. ;

Bigler, M. ;

Boutron, C. ;

Blunier, T. ;

Castellano, E. ;

Cattani, O. ;

Chappellaz, J. ;

Dahl-Jensen, D. ;

Debret, M. ;

Delmonte, B. ;

Dick, D. ;

Falourd, S. ;

Faria, S. ;

Federer, U. ;

Fischer, H. ;

Freitag, J. ;

Frenzel, A. ;

Fritzsche, D. ;

Fundel, F. ;

Gabrielli, P. ;

Gaspari, V. ;

Gersonde, R. ;

Graf, W. ;

Grigoriev, D. ;

Hamann, I. ;

Hansson, M. ;

Hoffmann, G. ;

Hutterli, M. A. ;

Huybrechts, P. ;

Isaksson, E. ;

Johnsen, S. ;

Jouzel, J. ;

Kaczmarska, M. ;

Karlin, T. ;

Kaufmann, P. ;

Kipfstuhl, S. ;

Kohno, M. ;

Lambert, F. ;

Lambrecht, Anja ;

Lambrecht, Astrid ;

Landais, A. ;

Lawer, G. ;

Leuenberger, M. ;

Littot, G. ;

Loulergue, L. ;

Luethi, D. ;

Maggi, V. .

NATURE, 2006, 444 (7116) :195-198

[2] Aerosol deposited in East Antarctica over the last glacial cycle:: Detailed apportionment of continental and sea-salt contributions [J].

Bigler, M ;

Röthlisberger, R ;

Lambert, F ;

Stocker, TF ;

Wagenbach, D .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2006, 111 (D8)

[3] Synchronization of ice core records via atmospheric gases [J].

Blunier, T. ;

Spahni, R. ;

Barnola, J. -M. ;

Chappellaz, J. ;

Loulergue, L. ;

Schwander, J. .

CLIMATE OF THE PAST, 2007, 3 (02) :325-330

[4] Asynchrony of Antarctic and Greenland climate change during the last glacial period [J].

Blunier, T ;

Chappellaz, J ;

Schwander, J ;

Dallenbach, A ;

Stauffer, B ;

Stocker, TF ;

Raynaud, D ;

Jouzel, J ;

Clausen, HB ;

Hammer, CU ;

Johnsen, SJ .

NATURE, 1998, 394 (6695) :739-743

[5] Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period [J].

Blunier, T ;

Brook, EJ .

SCIENCE, 2001, 291 (5501) :109-112

[6] On the origin and timing of rapid changes in atmospheric methane during the last glacial period [J].

Brook, EJ ;

Harder, S ;

Severinghaus, J ;

Steig, EJ ;

Sucher, CM .

GLOBAL BIOGEOCHEMICAL CYCLES, 2000, 14 (02) :559-572

[7] TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica [J].

Buiron, D. ;

Chappellaz, J. ;

Stenni, B. ;

Frezzotti, M. ;

Baumgartner, M. ;

Capron, E. ;

Landais, A. ;

Lemieux-Dudon, B. ;

Masson-Delmotte, V. ;

Montagnat, M. ;

Parrenin, F. ;

Schilt, A. .

CLIMATE OF THE PAST, 2011, 7 (01) :1-16

[8] Synchronising EDML and NorthGRIP ice cores using δ18O of atmospheric oxygen (δ18Oatm) and CH4 measurements over MIS5 (80-123 kyr) [J].

Capron, E. ;

Landais, A. ;

Lemieux-Dudon, B. ;

Schilt, A. ;

Masson-Delmotte, V. ;

Buiron, D. ;

Chappellaz, J. ;

Dahl-Jensen, D. ;

Johnsen, S. ;

Leuenberger, M. ;

Loulergue, L. ;

Oerter, H. .

QUATERNARY SCIENCE REVIEWS, 2010, 29 (1-2) :222-234

[9] CH4 and delta O-18 of O-2 records from Antarctic and Greenland ice: A clue for stratigraphic disturbance in the bottom part of the Greenland Ice Core Project and the Greenland Ice Sheet Project 2 ice cores [J].

Chappellaz, J ;

Brook, E ;

Blunier, T ;

Malaize, B .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1997, 102 (C12) :26547-26557

[10] Aeolian dust in East Antarctica (EPICA-Dome C and Vostok):: Provenance during glacial ages over the last 800 kyr [J].

Delmonte, B. ;

Andersson, P. S. ;

Hansson, M. ;

Schoberg, H. ;

Petit, J. R. ;

Basile-Doelsch, I. ;

Maggi, V. .

GEOPHYSICAL RESEARCH LETTERS, 2008, 35 (07)

← 1 2 3 4 →