DOI: 10.5194/tc-15-2917-2021
论文题名: Sensitivity of the Greenland surface mass and energy balance to uncertainties in key model parameters
作者: Zolles T. ; Born A.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 6 起始页码: 2917
结束页码: 2938
语种: 英语
英文摘要: We investigate the sensitivity of a distributed glacier surface mass and energy balance model using a variance-based analysis, for two distinct periods of the last glacial cycle: the present day (PD) and the Last Glacial Maximum (LGM). The results can be summarized in three major findings: the sensitivity towards individual model parameters and parameterizations is as variable in space as it is in time. The model is most sensitive to uncertainty related to atmospheric emissivity and the down-welling longwave radiation. While the turbulent latent heat flux has a sizable contribution to the surface mass balance uncertainty in central Greenland today, it dominates over the entire ice sheet during the cold climate of the LGM, in spite of its low impact on the overall surface mass balance of the Greenland ice sheet in the modern climate. We conclude that quantifying the model sensitivity is very helpful for tuning free model parameters because it clarifies the relative importance of individual parameters and highlights interactions between them that need to be considered. © Author(s) 2021. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164839
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth Science, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway
Recommended Citation:
Zolles T.,Born A.. Sensitivity of the Greenland surface mass and energy balance to uncertainties in key model parameters[J]. Cryosphere,2021-01-01,15(6)