DOI: 10.1002/2015GL064823
论文题名: Arctic sea ice freeboard from AltiKa and comparison with CryoSat-2 and Operation IceBridge
作者: Armitage T.W.K. ; Ridout A.L.
刊名: Geophysical Research Letters
ISSN: 0094-9352
EISSN: 1944-9083
出版年: 2015
卷: 42, 期: 16 起始页码: 6724
结束页码: 6731
语种: 英语
英文关键词: AltiKa
; altimetry
; CryoSat-2
; radar penetration
; sea ice
Scopus关键词: Aneroid altimeters
; Meteorological instruments
; Radar
; Radar equipment
; Radar measurement
; Radio altimeters
; Sea ice
; Snow
; AltiKa
; Altimetry
; Cryosat
; First-year ices
; Multi-year ices
; Radar interactions
; Sea-ice thickness
; Sources of uncertainty
; Ice
; airborne sensor
; altimetry
; CryoSat
; echolocation
; ice thickness
; radar
; sea ice
; snowpack
; uncertainty analysis
; Arctic
英文摘要: Satellite radar altimeters have improved our knowledge of Arctic sea ice thickness over the past decade. The main sources of uncertainty in sea ice thickness retrievals are associated with inadequate knowledge of the snow layer depth and the radar interaction with the snow pack. Here we adapt a method of deriving sea ice freeboard from CryoSat-2 to data from the AltiKa Ka band radar altimeter over the 2013-14 Arctic sea ice growth season. AltiKa measures basin-averaged freeboards between 4.4 cm and 6.9 cm larger than CryoSat-2 in October and March, respectively. Using airborne laser and radar measurements from spring 2013 and 2014, we estimate the effective scattering horizon for each sensor. While CryoSat-2 echoes penetrate to the ice surface over first-year ice and penetrate the majority (82 ± 3%) of the snow layer over multiyear ice, AltiKa echoes are scattered from roughly the midpoint (46 ± 5%) of the snow layer over both ice types. © 2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941735420&doi=10.1002%2f2015GL064823&partnerID=40&md5=fbe71131202676745eaea663e066a38d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8967
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: Centre for Polar Observation and Modelling, University College London, London, United Kingdom
Recommended Citation:
Armitage T.W.K.,Ridout A.L.. Arctic sea ice freeboard from AltiKa and comparison with CryoSat-2 and Operation IceBridge[J]. Geophysical Research Letters,2015-01-01,42(16).