DOI: 10.5194/tc-10-1463-2016
Scopus记录号: 2-s2.0-84978393947
论文题名: Landfast ice thickness in the Canadian Arctic Archipelago from observations and models
作者: Howell S ; E ; L ; , Laliberté F ; , Kwok R ; , Derksen C ; , King J
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 4 起始页码: 1463
结束页码: 1475
语种: 英语
英文关键词: climate modeling
; depth determination
; ice thickness
; ice-ocean interaction
; observational method
; snow
; temperature effect
; warming
; Alert
; Canada
; Canadian Arctic
; Cornwallis Island
; Ellesmere Island
; Eureka
; Nunavut
; Queen Elizabeth Islands
; Resolute
; Ora
英文摘要: Observed and modelled landfast ice thickness variability and trends spanning more than 5 decades within the Canadian Arctic Archipelago (CAA) are summarized. The observed sites (Cambridge Bay, Resolute, Eureka and Alert) represent some of the Arctic's longest records of landfast ice thickness. Observed end-of-winter (maximum) trends of landfast ice thickness (1957-2014) were statistically significant at Cambridge Bay (-4.31 ± 1. 4cm decade-1), Eureka (-4.65±1.7cmdecade-1) and Alert (-4.44 ± 1.6 cm-1) but not at Resolute. Over the 50+-year record, the ice thinned by g-1/40.24-0.26m at Cambridge Bay, Eureka and Alert with essentially negligible change at Resolute. Although statistically significant warming in spring and fall was present at all sites, only low correlations between temperature and maximum ice thickness were present; snow depth was found to be more strongly associated with the negative ice thickness trends. Comparison with multi-model simulations from Coupled Model Intercomparison project phase 5 (CMIP5), Ocean Reanalysis Intercomparison (ORA-IP) and Pan-Arctic Ice-Ocean Modeling and Assimilation System (PIOMAS) show that although a subset of current generation models have a "reasonable" climatological representation of landfast ice thickness and distribution within the CAA, trends are unrealistic and far exceed observations by up to 2 orders of magnitude. ORA-IP models were found to have positive correlations between temperature and ice thickness over the CAA, a feature that is inconsistent with both observations and coupled models from CMIP5. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75115
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: Climate Research Division, Environment and Climate Change Canada, Toronto, Canada; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Howell S,E,L,et al. Landfast ice thickness in the Canadian Arctic Archipelago from observations and models[J]. Cryosphere,2016-01-01,10(4)