Surface-melt driven Laurentide Ice Sheet retreat during the early Holocene

被引：35

作者：

Carlson, A. E. ^{[1
]}

Anslow, F. S. ^{[2
]}

Obbink, E. A. ^{[1
]}

LeGrande, A. N. ^{[3
,4
]}

Ullman, D. J. ^{[1
]}

Licciardi, J. M. ^{[5
]}

机构：

[1] Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA

[2] Univ British Columbia, Vancouver, BC V6T 1Z4, Canada

[3] Columbia Univ, NASA, Goddard Inst Space Studies, New York, NY 10025 USA

[4] Columbia Univ, Ctr Climate Syst Res, New York, NY 10025 USA

[5] Univ New Hampshire, Dept Earth Sci, Durham, NH 03824 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

美国国家科学基金会;

关键词：

ENERGY-BALANCE; GREENLAND; GLACIER; CLIMATE; ACCELERATION; DEGLACIATION;

D O I：

10.1029/2009GL040948

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

To better understand mechanisms of ice-sheet decay, we investigate the surface mass balance of the Laurentide Ice Sheet (LIS) during the early Holocene, a period of known rapid LIS retreat. We use a surface energy-mass balance model (EMBM) driven with conditions derived from an equilibrium atmosphere-ocean general circulation model 9 kilo-years ago simulation. Our EMBM indicates a net LIS surface mass balance of -0.67 +/- 0.13 m yr(-1), with losses primarily due to enhanced boreal summer insolation and warmer summers. This rate of loss compared to LIS volume reconstructions suggests that surface ablation accounted for 74 +/- 22% of the LIS mass loss with the remaining loss likely driven by dynamics resulting in basal sliding and calving. Thus surface melting likely played a governing role in the retreat and disappearance of this ice sheet. Citation: Carlson, A. E., F. S. Anslow, E. A. Obbink, A. N. LeGrande, D. J. Ullman, and J. M. Licciardi (2009), Surface-melt driven Laurentide Ice Sheet retreat during the early Holocene, Geophys. Res. Lett., 36, L24502, doi:10.1029/2009GL040948.

引用

页数：5

共 38 条

[1] Climatic Conditions for modelling the Northern Hemisphere ice sheets throughout the ice age cycle
Abe-Ouchi, A.
Segawa, T.
Saito, F.
[J]. CLIMATE OF THE PAST, 2007, 3 (03) : 423 - 438
[2] Distributed energy balance modeling of South Cascade Glacier, Washington and assessment of model uncertainty
Anslow, Faron S.
Hostetler, Steven
Bidlake, William R.
Clark, Peter U.
[J]. JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, 2008, 113 (F2)
[3] Forcing of the cold event of 8,200 years ago by catastrophic drainage of Laurentide lakes
Barber, DC
Dyke, A
Hillaire-Marcel, C
Jennings, AE
Andrews, JT
Kerwin, MW
Bilodeau, G
McNeely, R
Southon, J
Morehead, MD
Gagnon, JM
[J]. NATURE, 1999, 400 (6742) : 344 - 348
[4] INSOLATION VALUES FOR THE CLIMATE OF THE LAST 10000000 YEARS
BERGER, A
LOUTRE, MF
[J]. QUATERNARY SCIENCE REVIEWS, 1991, 10 (04) : 297 - 317
[5] On the origin and timing of rapid changes in atmospheric methane during the last glacial period
Brook, EJ
Harder, S
Severinghaus, J
Steig, EJ
Sucher, CM
[J]. GLOBAL BIOGEOCHEMICAL CYCLES, 2000, 14 (02) : 559 - 572
[6] Rapid early Holocene deglaciation of the Laurentide ice sheet
Carlson, Anders E.
Legrande, Allegra N.
Oppo, Delia W.
Came, Rosemarie E.
Schmidt, Gavin A.
Anslow, Faron S.
Licciardi, Joseph M.
Obbink, Elizabeth A.
[J]. NATURE GEOSCIENCE, 2008, 1 (09) : 620 - 624
[7] Paleohydraulics of the last outburst flood from glacial Lake Agassiz and the 8200 BP cold event
Clarke, GKC
Leverington, DW
Teller, JT
Dyke, AS
[J]. QUATERNARY SCIENCE REVIEWS, 2004, 23 (3-4) : 389 - 407
[8] Rapid sea level rise and ice sheet response to 8,200-year climate event
Cronin, T. M.
Vogt, P. R.
Willard, D. A.
Thunell, R.
Halka, J.
Berke, M.
Pohlman, J.
[J]. GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (20)
[9] SURFACE-ENERGY BALANCE AND KATABATIC FLOW OVER GLACIER AND TUNDRA DURING GIMEX-91
DUYNKERKE, PG
VANDENBROEKE, MR
[J]. GLOBAL AND PLANETARY CHANGE, 1994, 9 (1-2) : 17 - 28
[10] Dyke AS, 2004, DEV QUA SCI, V2, P373, DOI 10.1016/S1571-0866(04)80209-4

← 1 2 3 4 →