气候变化领域集成服务门户(CCPortal): The 2021 heatwave results in simultaneous but different hydrological responses over Canada west of 100°W

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DOI	10.1016/j.jhydrol.2024.130824
	The 2021 heatwave results in simultaneous but different hydrological responses over Canada west of 100°W
	Whitfield, Paul H.; Abdelmoaty, Hebatallah; Nerantzaki, Sofia; Papalexiou, Simon Michael
发表日期	2024
ISSN	0022-1694
EISSN	1879-2707
起始页码	632
卷号	632
英文摘要	The 2021 Western North America heatwave resulted in record high air temperatures over a large area of Canada west of 100 degrees. The heatwave persisted from mid -June into July, depending upon the threshold used to define the heatwave. The heatwave was a weather event that was short lived but had a widespread transient impact on hydrology in this single year. These impacts were more evident in nival systems because of the prominent role of snowmelt. In normal years, the timing of hydrological processes, particularly snowmelt, is a function of latitude and elevation; in 2021 the heatwave resulted in simultaneous high rates of snowmelt across rivers where a snowpack existed at the time of the event, and strong diurnal melt signal was a diagnostic. In 2021, rivers throughout Canada west of 100 degrees W responded strongly to the heatwave, but the response depended on three factors: location relative to the heat dome, the hydrologic regime, and the amount of snow present at the time. The melt signal was strongest in those basins that had not reached their annual peak often having discharges in the highest 5 % of historical observations for that day of the year. Discharges rapidly declined in basins already in recession indicating the rapid depletion of the snowpack. In basins with little or no remaining snow, streamflow often declined during the same period often to levels in the lowest 5 % of historical observations for that day of the year.
英文关键词	Heatwave; Hydrological impact; Western Canada; Snowmelt
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001194201200001
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298184
作者单位	University of Saskatchewan; University of Calgary; University of Saskatchewan; Global Institute for Water Security; University of Saskatchewan; Czech University of Life Sciences Prague
推荐引用方式 GB/T 7714	Whitfield, Paul H.,Abdelmoaty, Hebatallah,Nerantzaki, Sofia,et al. The 2021 heatwave results in simultaneous but different hydrological responses over Canada west of 100°W[J],2024,632.
APA	Whitfield, Paul H.,Abdelmoaty, Hebatallah,Nerantzaki, Sofia,&Papalexiou, Simon Michael.(2024).The 2021 heatwave results in simultaneous but different hydrological responses over Canada west of 100°W.JOURNAL OF HYDROLOGY,632.
MLA	Whitfield, Paul H.,et al."The 2021 heatwave results in simultaneous but different hydrological responses over Canada west of 100°W".JOURNAL OF HYDROLOGY 632(2024).