DOI: 10.1016/j.jag.2014.12.011
Scopus记录号: 2-s2.0-84941649630
论文题名: Applicability of Landsat 8 data for characterizing glacier facies and supraglacial debris
作者: Bhardwaj A ; , Joshi P ; K ; , Snehmani, Sam L ; , Singh M ; K ; , Singh S ; , Kumar R
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2015
卷: 38 起始页码: 51
结束页码: 64
语种: 英语
英文关键词: Glacier facies
; Landsat 8
; Remote sensing
; Supraglacial debris
Scopus关键词: algorithm
; facies analysis
; glacial debris
; glacier
; Landsat
; remote sensing
; valley glacier
英文摘要: The present work evaluates the applicability of operational land imager (OLI) and thermal infrared sensor (TIRS) on-board Landsat 8 satellite. We demonstrate an algorithm for automated mapping of glacier facies and supraglacial debris using data collected in blue, near infrared (NIR), short wave infrared (SWIR) and thermal infrared (TIR) bands. The reflectance properties in visible and NIR regions of OLI for various glacier facies are in contrast with those in SWIR region. Based on the premise that different surface types (snow, ice and debris) of a glacier should show distinct thermal regimes, the ‘at-satellite brightness temperature’ obtained using TIRS was used as a base layer for developing the algorithm. This base layer was enhanced and modified using contrasting reflectance properties of OLI bands. In addition to facies and debris cover characterization, another interesting outcome of this algorithm was extraction of crevasses on the glacier surface which were distinctly visible in output and classified images. The validity of this algorithm was checked using field data along a transect of the glacier acquired during the satellite pass over the study area. With slight scene-dependent threshold adjustments, this work can be replicated for mapping glacier facies and supraglacial debris in any alpine valley glacier. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79482
Appears in Collections: 气候变化事实与影响
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作者单位: Snow and Avalanche Study Establishment, Chandigarh, India; Department of Natural Resources, TERI University, New Delhi, India; Defence Research & Development Organisation, New Delhi, India; Motilal Nehru National Institute of Technology, Allahabad, UP, India; Department of Environmental Sciences, Sharda University, Greater Noida, UP, India
Recommended Citation:
Bhardwaj A,, Joshi P,K,et al. Applicability of Landsat 8 data for characterizing glacier facies and supraglacial debris[J]. International Journal of Applied Earth Observation and Geoinformation,2015-01-01,38