Modeling moulin distribution on Sermeq Avannarleq glacier using ASTER and WorldView imagery and fuzzy set theory

被引:35
作者
Phillips, T. [1 ,2 ]
Leyk, S. [3 ]
Rajaram, H. [4 ]
Colgan, W. [3 ,5 ]
Abdalati, W. [2 ,3 ,5 ,6 ]
McGrath, D. [3 ,5 ]
Steffen, K. [3 ,5 ]
机构
[1] Univ Colorado, Dept Aerosp Engn & Sci, Boulder, CO 80309 USA
[2] Univ Colorado, Earth Syst Observat Ctr, Boulder, CO 80309 USA
[3] Univ Colorado, Dept Geog, Boulder, CO 80309 USA
[4] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA
[5] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[6] NASA Headquarters, Washington, DC USA
基金
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词
Cryosphere; Fuzzy set theory; Surface melt; ASTER DEM; Ablation zone; GREENLAND ICE-SHEET; CLASSIFICATION; ACCELERATION; TEMPERATURE; MULTISCALE; ELEVATION; DRAINAGE; SYSTEMS; FLOW; MELT;
D O I
10.1016/j.rse.2011.04.029
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A fuzzy set overlay model is used to analyze the distribution of moulins (vertical meltwater conduits) on Sermeq Avannarleq ("Dead Glacier") in West Greenland in 1985 and 2008-09. Input data is derived from a historical topographic map based on airborne visible imagery and more recent WorldView-1 panchromatic imagery, as well as an Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) digital elevation model (DEM). A non-parametric best-fit model approach using a Monte Carlo simulation is used to derive the membership functions for moulin location based on three independent variables - elevation, slope and aspect - and to test for the robustness of the model. We determine that there is a topographic setting independent of time that favors the development of moulins in this region. Using the membership functions, and an optimal alpha cut derived for 1985, we could correctly predict the locations of -88% of the moulins in 2008-09. The model accounts for increased surface melt in 2008-09 in comparison to 1985. Our results demonstrate the potential of a fuzzy set based approach to improve models of ice sheet hydrology in Western Greenland, by providing more reliable spatial distributions of entry points of meltwater into the ice based on remotely sensed datasets of the ice surface, which are readily available. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码:2292 / 2301
页数:10
相关论文
共 48 条
[1]   Access of surface meltwater to beds of sub-freezing glaciers: preliminary insights [J].
Alley, RB ;
Dupont, TK ;
Parizek, BR ;
Anandakrishnan, S .
ANNALS OF GLACIOLOGY, VOL 40, 2005, 2005, 40 :8-14
[2]  
Anderson-Tarver C., 2011, CARTOGRAPHY GEOGRAPH
[3]  
[Anonymous], 2005, Principles of glacier mechanics
[4]   Landscape metrics with ecotones: pattern under uncertainty [J].
Arnot, C ;
Fisher, PF ;
Wadsworth, R ;
Wellens, J .
LANDSCAPE ECOLOGY, 2004, 19 (02) :181-195
[5]   Quantifying spatial classification uncertainties of the historical Wisconsin landscape (USA) [J].
Bolliger, J ;
Mladenoff, DJ .
ECOGRAPHY, 2005, 28 (02) :141-156
[6]  
Burrough, 1989, J SOIL SCI, V40, P477
[7]   Persistent englacial drainage features in the Greenland Ice Sheet [J].
Catania, G. A. ;
Neumann, T. A. .
GEOPHYSICAL RESEARCH LETTERS, 2010, 37
[8]  
Colgan W., 2011, HYDROLOGY MODEL J GL
[9]  
Come S., 1999, J GEOGR SYST, V1, P37, DOI DOI 10.1007/S101090050004
[10]   Temperature, accumulation, and ice sheet elevation in central Greenland through the last deglacial transition [J].
Cuffey, KM ;
Clow, GD .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1997, 102 (C12) :26383-26396