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  Climate modification by future ice sheet changes and consequences for ice sheet mass balance

Vizcaino, M., Mikolajewicz, U., Jungclaus, J., & Schurgers, G. (2010). Climate modification by future ice sheet changes and consequences for ice sheet mass balance. Climate Dynamics, 34, 301-324. doi:10.1007/s00382-009-0591-y.

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資料種別: 学術論文

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ClimDyn-34-2010-301.pdf (出版社版), 4MB
ファイルのパーマリンク:
https://hdl.handle.net/11858/00-001M-0000-0011-F64E-C
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ClimDyn-34-2010-301.pdf
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application/pdf / [MD5]
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 作成者:
Vizcaino, M.1, 著者           
Mikolajewicz, U.2, 著者           
Jungclaus, J.3, 著者                 
Schurgers, G.1, 2, 著者           
所属:
1IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society, ou_913547              
2Ocean Physics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society, ou_913557              
3Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society, ou_913553              

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キーワード: Ice sheets; Anthropogenic climate change; Feedbacks in the climate system; Meridional overturning circulation; Earth system modelling
 要旨: The future evolution of global ice sheets under anthropogenic greenhouse forcing and its impact on the climate system, including the regional climate of the ice sheets, are investigated with a comprehensive earth system model consisting of a coupled Atmosphere-Ocean General Circulation Model, a dynamic vegetation model and an ice sheet model. The simulated control climate is realistic enough to permit a direct coupling of the atmosphere and ice sheet components, avoiding the use of anomaly coupling, which represents a strong improvement with respect to previous modelling studies. Glacier ablation is calculated with an energy-balance scheme, a more physical approach than the commonly used degree-day method. Modifications of glacier mask, topographic height and freshwater fluxes by the ice sheets influence the atmosphere and ocean via dynamical and thermodynamical processes. Several simulations under idealized scenarios of greenhouse forcing have been performed, where the atmospheric carbon dioxide stabilizes at two and four times pre-industrial levels. The evolution of the climate system and the ice sheets in the simulations with interactive ice sheets is compared with the simulations with passively coupled ice sheets. For a four-times CO2 scenario forcing, a faster decay rate of the Greenland ice sheet is found in the non-interactive case, where melting rates are higher. This is caused by overestimation of the increase in near-surface temperature that follows the reduction in topographic height. In areas close to retreating margins, melting rates are stronger in the interactive case, due to changes in local albedo. Our results call for careful consideration of the feedbacks operating between ice sheets and climate after substantial decay of the ice sheets.

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言語: eng - English
 日付: 2010
 出版の状態: 出版
 ページ: -
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 目次: -
 査読: 査読あり
 識別子(DOI, ISBNなど): eDoc: 377799
DOI: 10.1007/s00382-009-0591-y
 学位: -

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出版物 1

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出版物名: Climate Dynamics
  出版物の別名 : Clim. Dyn.
種別: 学術雑誌
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出版社, 出版地: -
ページ: - 巻号: 34 通巻号: - 開始・終了ページ: 301 - 324 識別子(ISBN, ISSN, DOIなど): -