| DOI: | 10.5194/tc-10-1513-2016
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| Scopus记录号: | 2-s2.0-84978922924
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| 论文题名: | Arctic sea-ice diffusion from observed and simulated Lagrangian trajectories |
| 作者: | Rampal P; , Bouillon S; , Bergh J; , Ólason E
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2016
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| 卷: | 10, 期:4 | | 起始页码: | 1513
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| 结束页码: | 1527
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| 语种: | 英语
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| 英文关键词: | accuracy assessment
; buoy system
; data buoy
; data set
; diffusion
; Eulerian analysis
; hydrological modeling
; Lagrangian analysis
; sea ice
; tracer
; trajectory
; transport process
; Arctic
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| 英文摘要: | We characterize sea-ice drift by applying a Lagrangian diffusion analysis to buoy trajectories from the International Arctic Buoy Programme (IABP) dataset and from two different models: the standalone Lagrangian sea-ice model neXtSIM and the Eulerian coupled ice-ocean model used for the TOPAZ reanalysis. By applying the diffusion analysis to the IABP buoy trajectories over the period 1979–2011, we confirm that sea-ice diffusion follows two distinct regimes (ballistic and Brownian) and we provide accurate values for the diffusivity and integral timescale that could be used in Eulerian or Lagrangian passive tracers models to simulate the transport and diffusion of particles moving with the ice. We discuss how these values are linked to the evolution of the fluctuating displacements variance and how this information could be used to define the size of the search area around the position predicted by the mean drift. By comparing observed and simulated sea-ice trajectories for three consecutive winter seasons (2007–2011), we show how the characteristics of the simulated motion may differ from or agree well with observations. This comparison illustrates the usefulness of first applying a diffusion analysis to evaluate the output of modeling systems that include a sea-ice model before using these in, e.g., oil spill trajectory models or, more generally, to simulate the transport of passive tracers in sea ice. © 2016 Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75111
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| 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: | Nansen Environmental and Remote Sensing Center, Bjerknes Centre for Climate Research, Thormøhlens gate 47, Bergen, Norway
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| Recommended Citation: | |
Rampal P,, Bouillon S,, Bergh J,et al. Arctic sea-ice diffusion from observed and simulated Lagrangian trajectories[J]. Cryosphere,2016-01-01,10(4)
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