DOI: 10.5194/tc-8-2147-2014
Scopus记录号: 2-s2.0-84912075176
论文题名: First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR - Part 1: In situ observations
作者: Scharien R ; K ; , Landy J ; , Barber D ; G
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 6 起始页码: 2147
结束页码: 2162
语种: 英语
英文关键词: backscatter
; biogeochemical cycle
; climate modeling
; energy balance
; frequency-magnitude distribution
; in situ measurement
; mass balance
; radar
; sea ice
; synthetic aperture radar
; Arctic Ocean
; Canada
; Canadian Arctic
英文摘要: Understanding the evolution of melt ponds on Arctic sea ice is important for climate model parameterisations, weather forecast models and process studies involving mass, energy and biogeochemical exchanges across the ocean-sea ice-atmosphere interface. A field campaign was conducted in a region of level first-year sea ice (FYI) in the central Canadian Arctic Archipelago (CAA), during the summer of 2012, to examine the potential for estimating melt pond fraction (fp) from satellite synthetic aperture radar (SAR). In this study, 5.5 GHz (C-band) dual co- (HH +VV - horizontal transmit and horizontal receive + vertical transmit and vertical receive) and cross-polarisation (HV + HH - horizontal transmit and vertical receive + horizontal transmit and horizontal receive) radar scatterometer measurements of melt-pond-covered FYI are combined with ice and pond properties to analyse the effects of in situ physical and morphological changes on backscatter parameters. Surface roughness statistics of ice and ponds are characterised and compared to the validity domains of the Bragg and integral equation model (IEM) scattering models. Experimental and model results are used to outline the potential and limitations of the co-polarisation ratio (VV/HH) for retrieving melt pond information, including fp, at large incidence angles (≥ 35°). Despite high variability in cross-polarisation ratio (HV/HH) magnitudes, increases at small incidence angles (> 30°) are attributed to the formation of ice lids on ponds. Implications of the results for pond information retrievals from satellite C-, L- and P-band SARs are discussed. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74761
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Geography, University of Victoria, Victoria, BC, Canada; Centre for Earth Observation Science, Faculty of Environment Earth and Resources, University of Manitoba, Winnipeg, MB, Canada
Recommended Citation:
Scharien R,K,, Landy J,et al. First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR - Part 1: In situ observations[J]. Cryosphere,2014-01-01,8(6)