气候变化领域集成服务门户(CCPortal): Dramatic thinning of Alaskan river ice and its climatic controls

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DOI	10.1016/j.accre.2022.08.001
	Dramatic thinning of Alaskan river ice and its climatic controls
	Yang, Rui-Min; Zhang, Tingjun
发表日期	2022
ISSN	1674-9278
起始页码	623
结束页码	631
卷号	13 期号:5 页码:9
英文摘要	River ice thickness (RIT) directly influences human activities, such as rural transportation and subsistence activities, in addition to ecosystem and hydrology processes in the Arctic. Knowledge of RIT response to the rapid Arctic warming is very limited or essentially lacking. The scientific objective of this study is to investigate changes and variations in RIT and their response to rapid Arctic warming. We used ground -based measurements of 45 river gauge sites from 1961 through 2015 spanning 12 river basins across Alaska. The results indicate that the long-term mean maximum river ice thickness (MRIT) ranged from 40.3 +/- 12.7 cm in the southeast to 187.3 +/- 31.9 cm in northwest Alaska. MRIT decreased dramatically from 1961 to 2015, on average, at a rate of -0.26 +/- 0.17 cm per year, and RIT declined significantly in all months from October through March, and more rapidly in winter than in autumn and spring. The impacts of air temperature and snowfall on MRIT change were analysed, and their relative influences were 74% and 26%, respectively. Specifically, an increase in air temperature was the primary factor contributing to MRIT decrease, while increasing snowfall, and snow on river ice enhanced MRIT decline. Seasonally, snowfall was the primary regulator for thickness change and higher air temperature resulted in RIT declining in autumn, while ice thickness decrease was mostly driven by warming in spring. However, neither air temperature nor snowfall is the primary control factor for declining RIT in winter, and further work needs to be done to detect the reason.
英文关键词	River ice; Global warming; Arctic rapid change; Alaska; Arctic
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000874699900001
来源期刊	ADVANCES IN CLIMATE CHANGE RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273993
作者单位	Lanzhou University; Chinese Academy of Sciences; Lanzhou University of Finance & Economics
推荐引用方式 GB/T 7714	Yang, Rui-Min,Zhang, Tingjun. Dramatic thinning of Alaskan river ice and its climatic controls[J],2022,13(5):9.
APA	Yang, Rui-Min,&Zhang, Tingjun.(2022).Dramatic thinning of Alaskan river ice and its climatic controls.ADVANCES IN CLIMATE CHANGE RESEARCH,13(5),9.
MLA	Yang, Rui-Min,et al."Dramatic thinning of Alaskan river ice and its climatic controls".ADVANCES IN CLIMATE CHANGE RESEARCH 13.5(2022):9.