气候变化领域集成服务门户(CCPortal): Estimating the sea ice floe size distribution using satellite altimetry: Theory, climatology, and model comparison

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DOI	10.5194/tc-13-2869-2019
	Estimating the sea ice floe size distribution using satellite altimetry: Theory, climatology, and model comparison
	Horvat C.; Roach L.A.; Tilling R.; Bitz C.M.; Fox-Kemper B.; Guider C.; Hill K.; Ridout A.; Shepherd A.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2869
结束页码	2885
卷号	13 期号:11
英文摘要	In sea-ice-covered areas, the sea ice floe size distribution (FSD) plays an important role in many processes affecting the coupled sea-ice-ocean-atmosphere system. Observations of the FSD are sparse - traditionally taken via a painstaking analysis of ice surface photography - and the seasonal and inter-annual evolution of floe size regionally and globally is largely unknown. Frequently, measured FSDs are assessed using a single number, the scaling exponent of the closest power-law fit to the observed floe size data, although in the absence of adequate datasets there have been limited tests of this "power-law hypothesis". Here we derive and explain a mathematical technique for deriving statistics of the sea ice FSD from polar-orbiting altimeters, satellites with sub-daily return times to polar regions with high along-track resolutions. Applied to the CryoSat-2 radar altimetric record, covering the period from 2010 to 2018, and incorporating 11 million individual floe samples, we produce the first pan-Arctic climatology and seasonal cycle of sea ice floe size statistics. We then perform the first pan-Arctic test of the power-law hypothesis, finding limited support in the range of floe sizes typically analyzed in photographic observational studies. We compare the seasonal variability in observed floe size to fully coupled climate model simulations including a prognostic floe size and thickness distribution and coupled wave model, finding good agreement in regions where modeled ocean surface waves cause sea ice fracture. © 2019 Copernicus GmbH. All rights reserved.
学科领域	atmosphere-ice-ocean system; climate modeling; climatology; comparative study; CryoSat; estimation method; power law; satellite altimetry; sea ice; sea surface; seasonal variation; size distribution; Arctic
语种	英语
scopus关键词	atmosphere-ice-ocean system; climate modeling; climatology; comparative study; CryoSat; estimation method; power law; satellite altimetry; sea ice; sea surface; seasonal variation; size distribution; Arctic
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118814
作者单位	Institute at Brown for Environment and Society, Brown University, Providence, RI, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; National Institute of Water and Atmospheric Research, Wellington, New Zealand; Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Department of Mathematics, University of North Carolina, Chapel Hill, NC, United States; School of Mathematics, University of Minnesota, Minneapolis, MN, United States; Centre for Polar Observation and Modelling, University College London, London, United Kingdom; Centre for Polar Observation and Modelling, University of Leeds, Leeds, United Kingdom
推荐引用方式 GB/T 7714	Horvat C.,Roach L.A.,Tilling R.,et al. Estimating the sea ice floe size distribution using satellite altimetry: Theory, climatology, and model comparison[J],2019,13(11).
APA	Horvat C..,Roach L.A..,Tilling R..,Bitz C.M..,Fox-Kemper B..,...&Shepherd A..(2019).Estimating the sea ice floe size distribution using satellite altimetry: Theory, climatology, and model comparison.The Cryosphere,13(11).
MLA	Horvat C.,et al."Estimating the sea ice floe size distribution using satellite altimetry: Theory, climatology, and model comparison".The Cryosphere 13.11(2019).