DOI: 10.1002/2013GL057652
论文题名: Estimation of ICESat intercampaign elevation biases from comparison of lidar data in East Antarctica
作者: Hofton M.A. ; Luthcke S.B. ; Blair J.B.
刊名: Geophysical Research Letters
ISSN: 0094-8400
EISSN: 1944-8131
出版年: 2013
卷: 40, 期: 21 起始页码: 5698
结束页码: 5703
语种: 英语
英文关键词: elevation biases
; ICESat
; mass balance
Scopus关键词: Antarctic ice sheets
; Densification process
; elevation biases
; Glacial Isostatic Adjustments
; ICESat
; Land elevation satellites
; Mass balance
; Minimal surfaces
; Glacial geology
; Sensors
; Optical radar
; estimation method
; Gaussian method
; geoaccumulation
; ice sheet
; ICESat
; lidar
; mass balance
; observational method
; satellite data
; Antarctica
; East Antarctica
英文摘要: The Ice, Cloud, and land Elevation Satellite (ICESat) laser campaign elevation biases are estimated from an analysis of ICESat and airborne Land, Vegetation, and Ice Sensor lidar intrasensor and intersensor elevation differences from two regions of the Antarctic ice sheet that experienced minimal surface elevation change. Elevation observations are corrected for a combination of accumulation, melting, and firn densification processes and glacial isostatic adjustment. ICESat elevations are adjusted for the saturation and Gaussian-Centroid corrections. Relative to laser campaign L3I, biases are found to be less than ∼8 cm, except for campaign L2E at 14.72 cm corresponding to the time of a significant accumulation anomaly in East Antarctica. The intercampaign bias trend estimated from intersensor elevation differences computed over campaigns L2A to L2F (September 2003 to October 2009) excluding L2E is 1.04 ± 0.48 cm/yr. The intercampaign bias trend represents a correction to ICESat derived Antarctica mass balance of 117 ± 53 Gt/yr. Key Points We estimate ICESat elevation biases from intra/inter-sensor differences Relative to campaign L3I, biases are <~8 cm, except for campaign L2E at ~15 cm The trend estimated from the solution for L2A to L2F (no L2E)is 1.04+-0.48cm/yr ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887298339&doi=10.1002%2f2013GL057652&partnerID=40&md5=b50d1a8743e5b2347c08417c59a5f2c2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5664
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geographical Sciences, University of Maryland, Lefrak Hall, College Park, MD 20741, United States
Recommended Citation:
Hofton M.A.,Luthcke S.B.,Blair J.B.. Estimation of ICESat intercampaign elevation biases from comparison of lidar data in East Antarctica[J]. Geophysical Research Letters,2013-01-01,40(21).