DOI: 10.5194/tc-14-4201-2020
论文题名: Analyzing links between simulated Laptev Sea sea ice and atmospheric conditions over adjoining landmasses using causal-effect networks
作者: Rehder Z. ; Laura Niederdrenk A. ; Kaleschke L. ; Kutzbach L.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期: 11 起始页码: 4201
结束页码: 4215
语种: 英语
英文关键词: air-snow interaction
; atmospheric circulation
; discharge
; ice cover
; moisture content
; physical analysis
; sea ice
; thermodynamics
; Arctic Ocean
; Laptev Sea
英文摘要: We investigate how sea ice interacts with the atmosphere over adjacent landmasses in the Laptev Sea region as a step towards a better understanding of the connection between sea ice and permafrost. We identify physical mechanisms as well as local and large-scale drivers of sea-ice cover with a focus on one region with highly variable sea-ice cover and high sea-ice productivity: The Laptev Sea region. We analyze the output of a coupled ocean-sea-ice-atmosphere-hydrological-discharge model with two statistical methods. With the recently developed causal-effect networks we identify temporal links between different variables, while we use composites of high- A nd low-sea-ice-cover years to reveal spatial patterns and mean changes in variables. We find that in the model local sea-ice cover is a driven rather than a driving variable. Springtime melt of sea ice in the Laptev Sea is mainly controlled by atmospheric large-scale circulation, mediated through meridional wind speed and ice export. During refreeze in fall thermodynamic variables and feedback mechanisms are important-sea-ice cover is interconnected with air temperature, thermal radiation and specific humidity. Though low sea-ice cover leads to an enhanced southward transport of heat and moisture throughout summer, links from sea-ice cover to the atmosphere over land are weak, and both sea ice in the Laptev Sea and the atmospheric conditions over the adjacent landmasses are mainly controlled by common external drivers. © 2020 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164565
Appears in Collections: 气候变化与战略
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作者单位: Max Planck Institute for Meteorology, Bundesstraße 53, Hamburg, 20146, Germany; International Max Planck Research School on Earth System Modelling, Bundesstraße 53, Hamburg, 20146, Germany; Alfred Wegener Institute, Klußmannstr. 3d, Bremerhaven, 27570, Germany; Universität Hamburg, Allende-Platz 2, Hamburg, 20146, Germany; Universität Hamburg, Bundesstr. 53, Hamburg, 20146, Germany
Recommended Citation:
Rehder Z.,Laura Niederdrenk A.,Kaleschke L.,et al. Analyzing links between simulated Laptev Sea sea ice and atmospheric conditions over adjoining landmasses using causal-effect networks[J]. Cryosphere,2020-01-01,14(11)