气候变化领域集成服务门户(CCPortal): Landfast ice thickness in the Canadian Arctic Archipelago from observations and models

CCPortal

DOI	10.5194/tc-10-1463-2016
	Landfast ice thickness in the Canadian Arctic Archipelago from observations and models
	Howell S.E.L.; Laliberté F.; Kwok R.; Derksen C.; King J.
发表日期	2016
ISSN	19940416
卷号	10 期号:4
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).
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119619
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
推荐引用方式 GB/T 7714	Howell S.E.L.,Laliberté F.,Kwok R.,et al. Landfast ice thickness in the Canadian Arctic Archipelago from observations and models[J],2016,10(4).
APA	Howell S.E.L.,Laliberté F.,Kwok R.,Derksen C.,&King J..(2016).Landfast ice thickness in the Canadian Arctic Archipelago from observations and models.Cryosphere,10(4).
MLA	Howell S.E.L.,et al."Landfast ice thickness in the Canadian Arctic Archipelago from observations and models".Cryosphere 10.4(2016).