气候变化领域集成服务门户(CCPortal): Assessing uncertainties in sea ice extent climate indicators

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DOI	10.1088/1748-9326/aaf52c
	Assessing uncertainties in sea ice extent climate indicators
	Meier W.N.; Stewart J.S.
发表日期	2019
ISSN	17489318
卷号	14 期号:3
英文摘要	The uncertainties in sea ice extent (total area covered by sea ice with concentration >15%) derived from passive microwave sensors are assessed in two ways. Absolute uncertainty (accuracy) is evaluated based on the comparison of the extent between several products. There are clear biases between the extent from the different products that are of the order of 500 000 to 1 × 106 km2 depending on the season and hemisphere. These biases are due to differences in the algorithm sensitivity to ice edge conditions and the spatial resolution of different sensors. Relative uncertainty is assessed by examining extents from the National Snow and Ice Data Center Sea Ice Index product. The largest source of uncertainty, ∼100 000 km2, is between near-real-time and final products due to different input source data and different processing and quality control. For consistent processing, the uncertainty is assessed using different input source data and by varying concentration algorithm parameters. This yields a relative uncertainty of 30 000-70 000 km2. The Arctic minimum extent uncertainty is ∼40 000 km2. Uncertainties in comparing with earlier parts of the record may be higher due to sensor transitions. For the first time, this study provides a quantitative estimate of sea ice extent uncertainty. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Antarctic; Arctic; climate change indicator; passive microwave; remote sensing; sea ice; sea ice extent
语种	英语
scopus关键词	Climate change; Data handling; Microwave sensors; Quality control; Remote sensing; Sea ice; Antarctic; Arctic; Climate change indicators; Passive microwaves; Sea ice extent; Uncertainty analysis; algorithm; assessment method; climate change; concentration (composition); environmental indicator; quality control; remote sensing; sea ice; spatial resolution; uncertainty analysis; Antarctica; Arctic
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154673
作者单位	National Snow and Ice Data Center, Cooperative Institute for Research in the Environmental Sciences, University of Colorado at Boulder, United States
推荐引用方式 GB/T 7714	Meier W.N.,Stewart J.S.. Assessing uncertainties in sea ice extent climate indicators[J],2019,14(3).
APA	Meier W.N.,&Stewart J.S..(2019).Assessing uncertainties in sea ice extent climate indicators.Environmental Research Letters,14(3).
MLA	Meier W.N.,et al."Assessing uncertainties in sea ice extent climate indicators".Environmental Research Letters 14.3(2019).