DOI: 10.5194/tc-9-1955-2015
Scopus记录号: 2-s2.0-84945178593
论文题名: Lead detection in Arctic sea ice from CryoSat-2: Quality assessment, lead area fraction and width distribution
作者: Wernecke A ; , Kaleschke L
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 5 起始页码: 1955
结束页码: 1968
语种: 英语
英文关键词: CryoSat
; lead
; MODIS
; qualitative analysis
; sea ice
; sea surface height
; SPOT
; threshold
; waveform analysis
; Arctic Ocean
; Arctic Ocean
; Beaufort Sea
英文摘要: Leads cover only a small fraction of the Arctic sea ice but they have a dominant effect on the turbulent exchange between the ocean and the atmosphere. A supervised classification of CryoSat-2 measurements is performed by a comparison with visual MODIS scenes. For several parameters thresholds are optimized and tested in order to reproduce this prior classification. The maximum power of the waveform shows the best classification properties amongst them, including the pulse peakiness. The sea surface height is derived and its spread is clearly reduced for a classifier based on the maximum power compared to published ones. Lead area fraction estimates based on CryoSat-2 show a major fracturing event in the Beaufort Sea in 2013. The resulting Arctic-wide lead width distribution follows a power law with an exponent of 2.47 ± 0.04 for the winter seasons from 2011 to 2014, confirming and complementing a regional study based on a high-resolution SPOT image. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75237
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Institute of Oceanography, University of Hamburg, Bundesstrasse 53, Hamburg, Germany
Recommended Citation:
Wernecke A,, Kaleschke L. Lead detection in Arctic sea ice from CryoSat-2: Quality assessment, lead area fraction and width distribution[J]. Cryosphere,2015-01-01,9(5)