气候变化领域集成服务门户(CCPortal): Sea-ice deformation in a coupled ocean-sea-ice model and in satellite remote sensing data

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DOI	10.5194/tc-11-1553-2017
	Sea-ice deformation in a coupled ocean-sea-ice model and in satellite remote sensing data
	Spreen G.; Kwok R.; Menemenlis D.; Nguyen A.T.
发表日期	2017
ISSN	19940416
卷号	11 期号:4
英文摘要	A realistic representation of sea-ice deformation in models is important for accurate simulation of the sea-ice mass balance. Simulated sea-ice deformation from numerical simulations with 4.5, 9, and 18 km horizontal grid spacing and a viscous-plastic (VP) sea-ice rheology are compared with synthetic aperture radar (SAR) satellite observations (RGPS, RADARSAT Geophysical Processor System) for the time period 1996-2008. All three simulations can reproduce the large-scale ice deformation patterns, but small-scale sea-ice deformations and linear kinematic features (LKFs) are not adequately reproduced. The mean sea-ice total deformation rate is about 40 % lower in all model solutions than in the satellite observations, especially in the seasonal sea-ice zone. A decrease in model grid spacing, however, produces a higher density and more localized ice deformation features. The 4.5 km simulation produces some linear kinematic features, but not with the right frequency. The dependence on length scale and probability density functions (PDFs) of absolute divergence and shear for all three model solutions show a power-law scaling behavior similar to RGPS observations, contrary to what was found in some previous studies. Overall, the 4.5 km simulation produces the most realistic divergence, vorticity, and shear when compared with RGPS data. This study provides an evaluation of high and coarse-resolution viscous-plastic sea-ice simulations based on spatial distribution, time series, and power-law scaling metrics. © Author(s) 2017.
学科领域	deformation mechanism; glacier mass balance; numerical model; probability density function; remote sensing; satellite altimetry; sea ice; spatial distribution
语种	英语
scopus关键词	deformation mechanism; glacier mass balance; numerical model; probability density function; remote sensing; satellite altimetry; sea ice; spatial distribution
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/119376
作者单位	University of Bremen, Institute of Environmental Physics, Bremen, Germany; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; University of Texas at Austin, Austin, TX, United States
推荐引用方式 GB/T 7714	Spreen G.,Kwok R.,Menemenlis D.,et al. Sea-ice deformation in a coupled ocean-sea-ice model and in satellite remote sensing data[J],2017,11(4).
APA	Spreen G.,Kwok R.,Menemenlis D.,&Nguyen A.T..(2017).Sea-ice deformation in a coupled ocean-sea-ice model and in satellite remote sensing data.Cryosphere,11(4).
MLA	Spreen G.,et al."Sea-ice deformation in a coupled ocean-sea-ice model and in satellite remote sensing data".Cryosphere 11.4(2017).