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Article

Changes of Hydrological Components in Arctic Rivers Based on Multi-Source Data during 2003–2016

by 1, 2,* and 1
1
College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225127, China
2
State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Bruno Majone
Water 2021, 13(24), 3494; https://doi.org/10.3390/w13243494
Received: 27 October 2021 / Revised: 22 November 2021 / Accepted: 1 December 2021 / Published: 8 December 2021
The hydrological cycle of the Arctic river basin holds an important position in the Earth’s system, which has been significantly disturbed by global warming. This study analyzed recent changes in the hydrological components of two representative Arctic river basins in Siberia and North America, the Lena River Basin (LRB) and Mackenzie River Basin (MRB), respectively. The trends were diagnosed in hydrological components through a comparative analysis and estimations based on remote sensing and observational datasets during 2003–2016. The results showed that the annual precipitation decreased at rates of 1.9 mm/10a and 18.8 mm/10a in the MRB and LRB, respectively. In contrast, evapotranspiration (ET) showed increasing trends, with rates of 9.5 mm/10a and 6.3 mm/10a in the MRB and LRB, respectively. Terrestrial water storage (TWS) was obviously decreased, with rates of 30.3 mm/a and 18.9 mm/a in the MRB and LRB, respectively, which indicated that more freshwater was released. Contradictive trends of the runoffs were found in the two basins, which were increased in the LRB and decreased in the MRB, due to the contributions of the surface water and base flow. In addition, the mean annual cycles of precipitation, ET, TWS, runoff depth, surface flow and base flow behaved differently in both magnitudes and distributions in the LRB and MRB, the trends of which will likely continue with the pronounced warming climate. The current case studies can help to understand the recent changes in the Arctic hydro-climatology and the consequence of global warming in Arctic river basins. View Full-Text
Keywords: hydrological components; hydrograph separation; hydrological cycles; time lag; Arctic river basins hydrological components; hydrograph separation; hydrological cycles; time lag; Arctic river basins
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MDPI and ACS Style

Wu, H.; Xu, M.; Zhu, M. Changes of Hydrological Components in Arctic Rivers Based on Multi-Source Data during 2003–2016. Water 2021, 13, 3494. https://doi.org/10.3390/w13243494

AMA Style

Wu H, Xu M, Zhu M. Changes of Hydrological Components in Arctic Rivers Based on Multi-Source Data during 2003–2016. Water. 2021; 13(24):3494. https://doi.org/10.3390/w13243494

Chicago/Turabian Style

Wu, Hao, Min Xu, and Mengyan Zhu. 2021. "Changes of Hydrological Components in Arctic Rivers Based on Multi-Source Data during 2003–2016" Water 13, no. 24: 3494. https://doi.org/10.3390/w13243494

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