DOI: 10.5194/tc-12-271-2018
Scopus记录号: 2-s2.0-85041023286
论文题名: Monitoring glacier albedo as a proxy to derive summer and annual surface mass balances from optical remote-sensing data
作者: Davaze L ; , Rabatel A ; , Arnaud Y ; , Sirguey P ; , Six D ; , Letreguilly A ; , Dumont M
刊名: Cryosphere
ISSN: 19940416
出版年: 2018
卷: 12, 期: 1 起始页码: 271
结束页码: 286
语种: 英语
英文关键词: albedo
; algorithm
; altitude
; equilibrium line
; glacier
; glacier mass balance
; in situ measurement
; inventory
; map
; MODIS
; monitoring
; optical method
; proxy climate record
; remote sensing
; satellite data
; satellite imagery
; summer
; Terra (satellite)
; Alps
; France
英文摘要: Less than 0.25% of the 250000 glaciers inventoried in the Randolph Glacier Inventory (RGI V.5) are currently monitored with in situ measurements of surface mass balance. Increasing this archive is very challenging, especially using time-consuming methods based on in situ measurements, and complementary methods are required to quantify the surface mass balance of unmonitored glaciers. The current study relies on the so-called albedo method, based on the analysis of albedo maps retrieved from optical satellite imagery acquired since 2000 by the MODIS sensor, on board the TERRA satellite. Recent studies revealed substantial relationships between summer minimum glacier-wide surface albedo and annual surface mass balance, because this minimum surface albedo is directly related to the accumulation-area ratio and the equilibrium-line altitude. On the basis of 30 glaciers located in the French Alps where annual surface mass balance data are available, our study conducted on the period 2000-2015 confirms the robustness and reliability of the relationship between the summer minimum surface albedo and the annual surface mass balance. For the ablation season, the integrated summer surface albedo is significantly correlated with the summer surface mass balance of the six glaciers seasonally monitored. These results are promising to monitor both annual and summer glacier-wide surface mass balances of individual glaciers at a regional scale using optical satellite images. A sensitivity study on the computed cloud masks revealed a high confidence in the retrieved albedo maps, restricting the number of omission errors. Albedo retrieval artifacts have been detected for topographically incised glaciers, highlighting limitations in the shadow correction algorithm, although inter-annual comparisons are not affected by systematic errors. © 2018 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75432
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: Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE (UMR5001), Grenoble, France; National School of Surveying, University of Otago, Dunedin, New Zealand; Météo France, CNRS, CNRM-CEN (UMR3589), Grenoble, France
Recommended Citation:
Davaze L,, Rabatel A,, Arnaud Y,et al. Monitoring glacier albedo as a proxy to derive summer and annual surface mass balances from optical remote-sensing data[J]. Cryosphere,2018-01-01,12(1)