Variability and extreme of Mackenzie River daily discharge during 1973-2011

Yang, Daqing and Shi, Xiaogang and Marsh, Philip (2015) Variability and extreme of Mackenzie River daily discharge during 1973-2011. Quaternary International, 380-38. pp. 159-168. ISSN 1040-6182

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Abstract

This study systematically analyzes long-term (1973-2011) daily flow data collected near the Mackenzie basin outlet. It clearly defines the variability, extreme events, and changes in daily flow records over the past 4 decades. The results of this study accurately determine the seasonal cycle of river discharge, including the range of highest and lowest daily flows. The interannual variation of daily flow is generally small in the cold season, highest in the spring melt period, and large over the summer months mainly due to rainfall storm activities and associated floods. This study also shows that Mackenzie River flow regime has changed over the past 4 decades due to climate variation, with the advance of snowmelt peak timing by several days, decrease in maximum spring flows by about 3000 m3/s, and weak rise of cold season base flows. These results are the consequence of hydrological response to regional climate warming, and they provide new knowledge to improve our understanding of large-scale environmental changes over the broader northern regions.

Item Type:
Journal Article
Journal or Publication Title:
Quaternary International
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1904
Subjects:
ID Code:
89419
Deposited By:
Deposited On:
02 Jan 2018 09:20
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Sep 2020 04:23