气候变化领域集成服务门户(CCPortal): First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR

CCPortal

DOI	10.5194/tc-8-2147-2014
	First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR - Part 1: In situ observations
	Scharien R.K.; Landy J.; Barber D.G.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
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.
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120008
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
推荐引用方式 GB/T 7714	Scharien R.K.,Landy J.,Barber D.G.. First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR - Part 1: In situ observations[J],2014,8(6).
APA	Scharien R.K.,Landy J.,&Barber D.G..(2014).First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR - Part 1: In situ observations.Cryosphere,8(6).
MLA	Scharien R.K.,et al."First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR - Part 1: In situ observations".Cryosphere 8.6(2014).