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Titolo:
The influence of sea ice physics on simulations of climate change
Autore:
Holland, MM; Bitz, CM; Weaver, AJ;
Indirizzi:
Natl Ctr Atmospher Res, Boulder, CO 80307 USA Natl Ctr Atmospher Res Boulder CO USA 80307 er Res, Boulder, CO 80307 USA Polar Sci Ctr, Appl Phys Lab, Seattle, WA 98105 USA Polar Sci Ctr SeattleWA USA 98105 , Appl Phys Lab, Seattle, WA 98105 USA Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 3P6, Canada Univ Victoria Victoria BC Canada V8W 3P6 ci, Victoria, BC V8W 3P6, Canada
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
fascicolo: C9, volume: 106, anno: 2001,
pagine: 19639 - 19655
SICI:
0148-0227(20010915)106:C9<19639:TIOSIP>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLOBAL OCEAN CIRCULATION; THICKNESS DISTRIBUTION; FLUX ADJUSTMENT; MODEL; ATMOSPHERE; SENSITIVITY; CO2; THERMODYNAMICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Holland, MM Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA Natl Ctr Atmospher Res POB 3000 Boulder CO USA 80307 80307 USA
Citazione:
M.M. Holland et al., "The influence of sea ice physics on simulations of climate change", J GEO RES-O, 106(C9), 2001, pp. 19639-19655

Abstract

In this study, we examine the influence of ice dynamics and the sub-grid-scale ice thickness distribution on present-day and climate change simulations in a global coupled ice-ocean-atmosphere model of intermediate complexity. Under present-day conditions the sea-ice physics modifies both the annual mean and seasonal variation of ice-ocean-atmosphere conditions. In modelswith motionless sea ice, the ice volume increases and undergoes a smaller seasonal cycle. Resolving the ice thickness distribution also increases theice thickness, but enhances the seasonal cycle. The response of the systemto increased atmospheric CO2 forcing is also dependent on the sea ice physics. Simulating ice dynamics and the ice thickness distribution enhances the ice area response. However, the ice volume response is diminished when ice dynamics is included and enhanced when the ice thickness distribution is resolved. The oceanic thermohaline circulation and regional air temperatureresponse to global warming is also dependent on the sea ice parameterizations. Additional simulations were performed to quantify the influence of thealbedo feedback mechanism on climate change simulations. When the albedo feedback was inactive, amplified warming was still present (although reduced) at high latitudes due to the poleward retrcat of the ice cover and largerocean-atmosphere heat exchange. In these simulations, the albedo feedback accounted for 17% of the global air temperature increase and over 30% of the Northern Hemisphere ice area and volume decrease.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 06:17:07