气候变化领域集成服务门户(CCPortal): Enhanced winter snowmelt in the Antarctic Peninsula: Automatic snowmelt identification from radar scatterometer

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DOI	10.1016/j.rse.2020.111835
	Enhanced winter snowmelt in the Antarctic Peninsula: Automatic snowmelt identification from radar scatterometer
	Zheng L.; Zhou C.; Wang K.
发表日期	2020
ISSN	00344257
卷号	246
英文摘要	Surface snowmelt affects the energy balance through melt-albedo feedback and may endanger the ice shelves in the Antarctic Peninsula (AP) through hydrofracture. Here, we introduce an automatic snowmelt identification algorithm based on Quick Scatterometer and Advanced Scatterometer. The proposed method can provide self-adaptive thresholds for snowmelt detection based on Rosin thresholding, and is able to detect weak melt signals with a wavelet denoising procedure. Results suggest the AP surface snowmelt has slightly declined during 1999–2018 in the context of recent cooling. However, winter melt index (i.e., melt days times the area of melting) has significantly increased (above the 99% confidence level) with a rate of 83% decade−1. Unprecedented winter snowmelt was found in 2015/2016 when about one-third of the AP experienced snowmelt in late May. This may be attributed to the intrusions of marine air and the enhanced föhn-driven warming resulted from the abnormal northwesterly flow driven by a significant deepening of the Amundsen Sea Low. © 2020 Elsevier Inc.
英文关键词	Antarctic Peninsula; Rosin thresholding; Scatterometer; Wavelet denoising; Winter snowmelt
语种	英语
scopus关键词	Meteorological instruments; Pattern recognition systems; Adaptive thresholds; Albedo feedbacks; Antarctic Peninsula; Confidence levels; Hydro-fracture; Identification algorithms; Scatterometers; Wavelet denoising; Snow melting systems; albedo; algorithm; automation; climate feedback; energy balance; identification method; signal-to-noise ratio; snowmelt; threshold; winter; Amundsen Sea; Antarctic Peninsula; Antarctica; Southern Ocean; West Antarctica
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179300
作者单位	School of Geospatial Engineering and Science, Sun Yat-Sen University, Guangzhou, 510275, China; Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, China; School of Geographic Sciences, East China Normal University, Shanghai, 200241, China
推荐引用方式 GB/T 7714	Zheng L.,Zhou C.,Wang K.. Enhanced winter snowmelt in the Antarctic Peninsula: Automatic snowmelt identification from radar scatterometer[J],2020,246.
APA	Zheng L.,Zhou C.,&Wang K..(2020).Enhanced winter snowmelt in the Antarctic Peninsula: Automatic snowmelt identification from radar scatterometer.Remote Sensing of Environment,246.
MLA	Zheng L.,et al."Enhanced winter snowmelt in the Antarctic Peninsula: Automatic snowmelt identification from radar scatterometer".Remote Sensing of Environment 246(2020).