Mass balance of the greenland ice sheet from GRACE and surface mass balance modelling

被引：0
作者：
Zou F. [1 ]
Tenzer R. [1 ]
Fok H.S. [2 ]
Nichol J.E. [3 ]
机构：
[1] Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong
[2] School of Geodesy and Geomatics, Wuhan University, Wuhan
[3] School of Global Studies, University of Sussex, Falmer, Brighton
来源：
Fok, Hok Sum (xshhuo@sgg.whu.edu.cn) | 1600年 / MDPI AG, Postfach, Basel, CH-4005, Switzerland卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Climate change; Glacier melting; GRACE; Greenland; SMB;
D O I：
10.3390/W12071847
中图分类号：
学科分类号：
摘要：
The Greenland Ice Sheet (GrIS) is losing mass at a rate that represents a major contribution to global sea-level rise in recent decades. In this study, we use the Gravity Recovery and Climate Experiment (GRACE) data to retrieve the time series variations of the GrIS from April 2002 to June 2017. We also estimate the mass balance from the RACMO2.3 and ice discharge data in order to obtain a comparative analysis and cross-validation. A detailed analysis of long-term trend and seasonal and inter-annual changes in the GrIS is implemented by GRACE and surface mass balance (SMB) modeling. The results indicate a decrease of 267.77 8.68 Gt/yr of the GrIS over the 16-year period. There is a rapid decline from 2002 to 2008, which accelerated from 2009 to 2012 before declining relatively slowly from 2013 to 2017. The mass change inland is significantly smaller than that detected along coastal regions, especially in the southeastern, southwestern, and northwestern regions. The mass balance estimates from GRACE and SMB minus ice discharge (SMB-D) are very consistent. The ice discharge manifests itself mostly as a long-term trend, whereas seasonal mass variations are largely attributed to surface mass processes. The GrIS mass changes are mostly attributed to mass loss during summer. Summer mass changes are highly correlated with climate changes. © 2020 by the authors.
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[1]  
Bevis M., Harig C., Khan S.A., Brown A., Simons F.J., Willis M., Fettweis X., van den Broeke M.R., Madsen F.B., Kendrick E., Et al., Accelerating changes in ice mass within Greenland, and the ice sheet's sensitivity to atmospheric forcing, Proc. Natl. Acad. Sci. USA, 116, pp. 1934-1939, (2019)
[2]  
Chambers D.P., Calculating trends from GRACE in the presence of large changes in continental ice storage and ocean mass, Geophys. J. Int, 176, pp. 415-419, (2009)
[3]  
Ettema J., van den Broeke M.R., van Meijgaard E., van de Berg W.J., Bamber J.L., Box J.E., Bales R.C., Higher surface mass balance of the Greenland ice sheet reveled by high-resolution climate modeling, Geophys. Res. Lett, (2009)
[4]  
Slobbe D.C., Ditmar P., Lindenbergh R.C., Estimating the rates of mass change, ice volume change and snow volume change in Greenland from ICESat and GRACE data, Geophys. J. Int, 176, pp. 95-106, (2009)
[5]  
Ewert H., Groh A., Dietrich R., Volume and mass changes of the Greenland ice sheet inferred from ICESat and GRACE. J, Geodym, 6-59, pp. 1H-123, (2012)
[6]  
Helm V., Humbert A., Miller H., Elevation and elevation change of Greenland and Antarctica derived from CryoSat-2, Cryosphere, 8, pp. 1539-1559, (2014)
[7]  
Laxon S.W., Giles K.A., Ridout A.L., Wingham D.J., Willatt R., Cullen R., Kwok R., Schweiger A., Zhang J., Haa C., Et al., CryoSat-2 estimates of Arctic sea ice thickness and volume. Geophys. Res, Lett, 40, pp. 732-737, (2013)
[8]  
Rignot E., Mouginot J., Ice flow in Greenland <sup>f</sup>or the International Polar Year 2008-2009, Geoplty. Res. Lett, (2012)
[9]  
Su X., Shum C.K., Guo J., Duan J., Howat I., Yi Y., High resolution Greenland ice sheet inter-annual mass variations combining GRACE gravimetry and Envisat altimetry, Earth Planet. Sci. Lett, 422, pp. 11-17, (2015)
[10]  
Baur O., Kuhn M., Featherstone W.E., GRACE-derived ice-mass variations over Greenland by accounting for leakage effects, J. Geophys. Res, (2009)
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