DOI: 10.1002/2016GL071230
论文题名: Characterizing near-surface firn using the scattered signal component of the glacier surface return from airborne radio-echo sounding
作者: Rutishauser A. ; Grima C. ; Sharp M. ; Blankenship D.D. ; Young D.A. ; Cawkwell F. ; Dowdeswell J.A.
刊名: Geophysical Research Letters
ISSN: 0094-8285
EISSN: 1944-8016
出版年: 2016
卷: 43, 期: 24 起始页码: 12502
结束页码: 12510
语种: 英语
英文关键词: firn characterization
; radio-echo sounding
; scattering signal component
Scopus关键词: Ice
; Incoherent scattering
; Stratigraphy
; Surface roughness
; Ground based radar
; Radio-echo sounding
; Scattered component
; Scattered signals
; Scattering distributions
; Scattering signals
; Spatial heterogeneity
; Surface roughness effects
; Surface scattering
英文摘要: We derive the scattered component (hereafter referred to as the incoherent component) of glacier surface echoes from airborne radio-echo sounding measurements over Devon Ice Cap, Arctic Canada, and compare the scattering distribution to firn stratigraphy observations from ground-based radar data. Low scattering correlates to laterally homogeneous firn above 1800 m elevation containing thin, flat, and continuous ice layers and below 1200 m elevation where firn predominantly consists of ice. Increased scattering between elevations of 1200–1800 m corresponds to firn with inhomogeneous, undulating ice layers. No correlation was found to surface roughness and its theoretical incoherent backscattering values. This indicates that the scattering component is mainly influenced by the near-surface firn stratigraphy, whereas surface roughness effects are minor. Our results suggest that analyzing the scattered signal component of glacier surface echoes is a promising approach to characterize the spatial heterogeneity of firn that is affected by melting and refreezing processes. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007495668&doi=10.1002%2f2016GL071230&partnerID=40&md5=5ecddb1889dc578025692f47e4cb2680
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9248
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada
Recommended Citation:
Rutishauser A.,Grima C.,Sharp M.,et al. Characterizing near-surface firn using the scattered signal component of the glacier surface return from airborne radio-echo sounding[J]. Geophysical Research Letters,2016-01-01,43(24).