Response of the southern Greenland Ice Sheet during the last two deglaciations

被引：73

作者：

Carlson, Anders ^{[1
]}

Stoner, Joseph S. ^{[2
]}

Donnelly, Jeffrey P. ^{[1
]}

Hillaire-Marcel, Claude ^{[3
]}

机构：

[1] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA

[2] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA

[3] Univ Quebec, Geotop, Montreal, PQ H3C 3P8, Canada

来源：

GEOLOGY | 2008年 / 36卷 / 05期

关键词：

southern Greenland Ice Sheet; deglaciation; sea level; ice sheet response;

D O I：

10.1130/G24519A.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The retreat of the southern Greenland Ice Sheet (GIS) during the last deglaciation (Termination I: TI) is poorly dated by conventional means; there is even greater uncertainty about the penultimate deglaciation (Termination II: TII), leading to the assumption that the southern GIS has a significant lag in its response to deglacial warming. Here we use geochemical terrestrial sediment proxies ([Fe] and [Ti]) from a well-studied southern Greenland marine sediment sequence to examine the behavior of the southern GIS during TI and TII. Our records show that during TI and TII the southern GIS response was essentially synchronous with deglacial North Atlantic warming, implying greater climate sensitivity than previously assumed. During TI, elevated ablation lasted similar to 5 k.y., whereas ablation remained elevated for similar to 12 k.y. during TII, suggesting a reduced southern GIS during TII that contributed a significant fraction of the higher sea level during the subsequent interglacial.

引用

页码：359 / 362

页数：4

共 37 条

[1] Ice-sheet and sea-level changes [J].

Alley, RB ;

Clark, PU ;

Huybrechts, P ;

Joughin, I .

SCIENCE, 2005, 310 (5747) :456-460

[2] High-resolution record of Northern Hemisphere climate extending into the last interglacial period [J].

Andersen, KK ;

Azuma, N ;

Barnola, JM ;

Bigler, M ;

Biscaye, P ;

Caillon, N ;

Chappellaz, J ;

Clausen, HB ;

DahlJensen, D ;

Fischer, H ;

Flückiger, J ;

Fritzsche, D ;

Fujii, Y ;

Goto-Azuma, K ;

Gronvold, K ;

Gundestrup, NS ;

Hansson, M ;

Huber, C ;

Hvidberg, CS ;

Johnsen, SJ ;

Jonsell, U ;

Jouzel, J ;

Kipfstuhl, S ;

Landais, A ;

Leuenberger, M ;

Lorrain, R ;

Masson-Delmotte, V ;

Miller, H ;

Motoyama, H ;

Narita, H ;

Popp, T ;

Rasmussen, SO ;

Raynaud, D ;

Rothlisberger, R ;

Ruth, U ;

Samyn, D ;

Schwander, J ;

Shoji, H ;

Siggard-Andersen, ML ;

Steffensen, JP ;

Stocker, T ;

Sveinbjörnsdóttir, AE ;

Svensson, A ;

Takata, M ;

Tison, JL ;

Thorsteinsson, T ;

Watanabe, O ;

Wilhelms, F ;

White, JWC .

NATURE, 2004, 431 (7005) :147-151

[3]

Andrews JT, 1997, J QUATERNARY SCI, V12, P1, DOI 10.1002/(SICI)1099-1417(199701/02)12:1<1::AID-JQS288>3.0.CO

[4]

2-T

[5] Chronology of the last recession of the Greenland Ice Sheet [J].

Bennike, O ;

Björck, S .

JOURNAL OF QUATERNARY SCIENCE, 2002, 17 (03) :211-219

[6] INSOLATION VALUES FOR THE CLIMATE OF THE LAST 10000000 YEARS [J].

BERGER, A ;

LOUTRE, MF .

QUATERNARY SCIENCE REVIEWS, 1991, 10 (04) :297-317

[7]

Björck S, 2002, GEOLOGY, V30, P427, DOI 10.1130/0091-7613(2002)030<0427:AMYDSC>2.0.CO

[8]

[9] 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

[10] New data for the Last Glacial Maximum in Great Britain and Ireland [J].

Bowen, DQ ;

Phillips, FM ;

McCabe, AM ;

Knutz, PC ;

Sykes, GA .

QUATERNARY SCIENCE REVIEWS, 2002, 21 (1-3) :89-101

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