Simulated influence of carbon dioxide, orbital forcing and ice sheets on the climate of the Last Glacial Maximum

被引：195

作者：

Weaver, AJ ^{[1
]}

Eby, M ^{[1
]}

Augustus, FF ^{[1
]}

Wiebe, EC ^{[1
]}

机构：

[1] Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 3P6, Canada

来源：

NATURE | 1998年 / 394卷 / 6696期

关键词：

D O I：

10.1038/29695

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A coupled atmosphere-ocean-sea-ice model is used to investigate the climate of the Last Glacial Maximum (similar to 21,000 years ago) and the relative climate-forcing effects of atmosphere CO2, the Earth's orbital parameters and Ice-sheet albedo. Tropical temperatures are found to be similar to 2.2 degrees C less than today's-slightly colder than indicated by the CLIMAP palaeoclimate reconstruction. This result is consistent with a low to medium climate sensitivity to radiative perturbations. Temperatures are colder still in the northern North Atlantic region, owing to a weakening and shallowing of the thermohaline circulation, A sensitivity analysis suggests that changes in ocean circulation since the Last Glacial Maximum have not contributed directly to the global-mean temperature change since that time.

引用

页码：847 / 853

页数：7

共 54 条

[1]

[Anonymous], ANTARCTIC GEOSCIENCE

[2]

[Anonymous], 1981, LAST GREAT ICE SHEET

[3] Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry [J].

Bard, E ;

Rostek, F ;

Sonzogni, C .

NATURE, 1997, 385 (6618) :707-710

[4] Abrupt changes in early Holocene tropical sea surface temperature derived from coral records [J].

Beck, JW ;

Recy, J ;

Taylor, F ;

Edwards, RL ;

Cabioch, G .

NATURE, 1997, 385 (6618) :705-707

[5]

BERGER AL, 1978, J ATMOS SCI, V35, P2362, DOI [10.1175/1520-0469(1978)035<2362:LTVODI>2.0.CO

[6]

2, 10.1016/0033-5894(78)90064-9]

[7] NORTH-ATLANTIC THERMOHALINE CIRCULATION DURING THE PAST 20,000 YEARS LINKED TO HIGH-LATITUDE SURFACE-TEMPERATURE [J].

BOYLE, EA ;

KEIGWIN, L .

NATURE, 1987, 330 (6143) :35-40

[8]

Broccoli A. J., 1987, CLIM DYNAM, V1, P87, DOI 10.1007/BF01054478

[9] The role of ocean-atmosphere interactions in tropical cooling during the last glacial maximum [J].

Bush, ABG ;

Philander, SGH .

SCIENCE, 1998, 279 (5355) :1341-1344

[10] Faunal and alkenone reconstructions of subtropical North Atlantic surface hydrography and paleotemperature over the last 28 kyr [J].

Chapman, MR ;

Shackleton, NJ ;

Zhao, M ;

Eglinton, G .

PALEOCEANOGRAPHY, 1996, 11 (03) :343-357

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