DOI: 10.5194/tc-15-1053-2021
论文题名: On the statistical properties of sea-ice lead fraction and heat fluxes in the arctic
作者: Ólason E. ; Rampal P. ; Dansereau V.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 2 起始页码: 1053
结束页码: 1064
语种: 英语
英文关键词: heat flux
; numerical model
; sea ice
; statistical analysis
; Arctic
英文摘要: We explore several statistical properties of the observed and simulated Arctic sea-ice lead fraction, as well as the statistics of simulated Arctic ocean-Atmosphere heat fluxes. First we show that the observed lead fraction in the Central Arctic has a monofractal spatial scaling, which we relate to the multifractal spatial scaling present in sea-ice deformation rates. We then show that the relevant statistics of the observed lead fraction in the Central Arctic are well represented by our model, neXtSIM. Given that the heat flux through leads may be up to 2 orders of magnitude larger than that through unbroken ice, we then explore the statistical properties (probability distribution function-PDF-and spatial scaling) of the heat fluxes simulated by neXtSIM. We demonstrate that the modelled heat fluxes present a multifractal scaling in the Central Arctic, where heat fluxes through leads dominate the high-flux tail of the PDF. This multifractal character relates to the multi-and monofractal character of deformation rates and the lead fraction. In the wider Arctic, the high-flux tail of the PDF is dominated by an exponential decay, which we attribute to the presence of coastal polynyas. Finally, we show that the scaling of the simulated lead fraction and heat fluxes depends weakly on the model resolution and discuss the role sub-grid-scale parameterisations of the ice heterogeneity may have in improving this result. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164776
Appears in Collections: 气候变化与战略
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作者单位: Nansen Environmental Remote Sensing Center and Bjerknes Centre for Climate Research, Bergen, Norway; Institut de Géophysique de l'Environnement, CNRS, Grenoble, France; Institut des Sciences de la Terre, CNRS, Grenoble, France
Recommended Citation:
Ólason E.,Rampal P.,Dansereau V.. On the statistical properties of sea-ice lead fraction and heat fluxes in the arctic[J]. Cryosphere,2021-01-01,15(2)