DOI: 10.5194/tc-10-1089-2016
Scopus记录号: 2-s2.0-84971671121
论文题名: The climatic mass balance of Svalbard glaciers: A 10-year simulation with a coupled atmosphere-glacier mass balance model
作者: Aas K ; S ; , Dunse T ; , Collier E ; , Schuler T ; V ; , Berntsen T ; K ; , Kohler J ; , Luks B
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 3 起始页码: 1089
结束页码: 1104
语种: 英语
英文关键词: annual variation
; climate variation
; glacier mass balance
; ice cap
; precipitation assessment
; satellite altimetry
; topography
; wind field
; Arctic
; Austfonna
; Hansbreen
; Nordaustlandet
; Spitsbergen
; Svalbard
; Svalbard and Jan Mayen
英文摘要: In this study we simulate the climatic mass balance of Svalbard glaciers with a coupled atmosphere-glacier model with 3 km grid spacing, from September 2003 to September 2013. We find a mean specific net mass balance of -257mmw.e. yr-1, corresponding to a mean annual mass loss of about 8.7 Gt, with large interannual variability. Our results are compared with a comprehensive set of mass balance, meteorological, and satellite measurements. Model temperature biases of 0.19 and -1.9 °C are found at two glacier automatic weather station sites. Simulated climatic mass balance is mostly within about 100mmw.e. yr-1 of stake measurements, and simulated winter accumulation at the Austfonna ice cap shows mean absolute errors of 47 and 67mmw.e. yr-1 when compared to radar-derived values for the selected years 2004 and 2006. Comparison of modeled surface height changes from 2003 to 2008, and satellite altimetry reveals good agreement in both mean values and regional differences. The largest deviations from observations are found for winter accumulation at Hansbreen (up to around 1000mmw.e. yr-1), a site where sub-grid topography and wind redistribution of snow are important factors. Comparison with simulations using 9 km grid spacing reveal considerable differences on regional and local scales. In addition, 3 km grid spacing allows for a much more detailed comparison with observations than what is possible with 9 km grid spacing. Further decreasing the grid spacing to 1 km appears to be less significant, although in general precipitation amounts increase with resolution. Altogether, the model compares well with observations and offers possibilities for studying glacier climatic mass balance on Svalbard both historically as well as based on climate projections. © 2016 Author(s). CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75139
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Geosciences, University of Oslo, Oslo, Norway; Climate System Research Group, Institute of Geography, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany; Norwegian Polar Institute, Tromsø, Norway; Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland
Recommended Citation:
Aas K,S,, Dunse T,et al. The climatic mass balance of Svalbard glaciers: A 10-year simulation with a coupled atmosphere-glacier mass balance model[J]. Cryosphere,2016-01-01,10(3)