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

[11] Effect of vegetation on an ice-age climate model simulation [J].

Crowley, TJ ;

Baum, SK .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1997, 102 (D14) :16463-16480

[12] Synchronous, high-frequency oscillations in tropical sea surface temperatures and North Atlantic Deep Water production during the last glacial cycle [J].

Curry, WB ;

Oppo, DW .

PALEOCEANOGRAPHY, 1997, 12 (01) :1-14

[13]

da Silva A. M., 1994, ATLAS SURFACE MARINE, V3

[14] A 17,000-YEAR GLACIO-EUSTATIC SEA-LEVEL RECORD - INFLUENCE OF GLACIAL MELTING RATES ON THE YOUNGER DRYAS EVENT AND DEEP-OCEAN CIRCULATION [J].

FAIRBANKS, RG .

NATURE, 1989, 342 (6250) :637-642

[15] An atmospheric energy-moisture balance model: Climatology, interpentadal climate change, and coupling to an ocean general circulation model [J].

Fanning, AF ;

Weaver, AJ .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1996, 101 (D10) :15111-15128

[16] Temporal-geographical meltwater influences on the North Atlantic Conveyor: Implications for the Younger Dryas [J].

Fanning, AF ;

Weaver, AJ .

PALEOCEANOGRAPHY, 1997, 12 (02) :307-320

[17] A MODEL STUDY OF THE ATLANTIC THERMOHALINE CIRCULATION DURING THE LAST GLACIAL MAXIMUM [J].

FICHEFET, T ;

HOVINE, S ;

DUPLESSY, JC .

NATURE, 1994, 372 (6503) :252-255

[18] Simulation of modern and glacial climates with a coupled global model of intermediate complexity [J].

Ganopolski, A ;

Rahmstorf, S ;

Petoukhov, V ;

Claussen, M .

NATURE, 1998, 391 (6665) :351-356

[19] NEW PARAMETERIZATIONS AND SENSITIVITIES FOR SIMPLE CLIMATE MODELS [J].

GRAVES, CE ;

LEE, WH ;

NORTH, GR .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1993, 98 (D3) :5025-5036

[20] TROPICAL TEMPERATURE-VARIATIONS SINCE 20,000 YEARS AGO - MODULATING INTERHEMISPHERIC CLIMATE-CHANGE [J].

GUILDERSON, TP ;

FAIRBANKS, RG ;

RUBENSTONE, JL .

SCIENCE, 1994, 263 (5147) :663-665

← 1 2 3 4 5 6 →