气候变化领域集成服务门户(CCPortal): Evidence of Hydrological Intensification and Regime Change From Northern Alaskan Watershed Runoff

CCPortal

DOI	10.1029/2020GL089186
	Evidence of Hydrological Intensification and Regime Change From Northern Alaskan Watershed Runoff
	Arp C.D.; Whitman M.S.; Kemnitz R.; Stuefer S.L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Snowmelt-dominated runoff regimes have defined northern Alaskan rivers. Discharge records from three watersheds within the National Petroleum Reserve in Alaska (NPR-A) span 19 years and capture three notable periods of changing runoff. In the first, 2001–2008, mean annual runoff (MAR) averaged 90 mm, characterized by sharp snowmelt runoff and summer drought. Over the next 7 years, larger MAR averaged 120 mm driven by high and early snowmelt runoff. The most recent 4 years, 2016–2019, had even higher MAR of 163 mm with high and sustained late summer flows. Hydrograph analysis suggests a shift toward rainfall-dominated runoff in the most recent period compared to snowmelt-dominated hydrographs in the previous two. Declining sea ice appears closely linked to increasing late summer precipitation and a shift toward rainfall runoff. Future development in the NPR-A will require continued hydrological monitoring and planning to mitigate flood and erosion hazards, permafrost degradation, and ecosystem impairment. ©2020. The Authors.
英文关键词	Proven reserves; Rain; Sea ice; Snow melting systems; Hydrograph analysis; Hydrological monitoring; Mean annual runoffs; Permafrost degradation; Petroleum reserve; Rainfall runoff; Summer precipitation; Watershed runoff; Runoff; discharge; drought; hydrograph; hydrological modeling; permafrost; rainfall; runoff; sea ice; snowmelt; Alaska; National Petroleum Reserve; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169813
作者单位	Water and Environmental Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States; Bureau of Land Management, Arctic District Office, Fairbanks, AK, United States
推荐引用方式 GB/T 7714	Arp C.D.,Whitman M.S.,Kemnitz R.,et al. Evidence of Hydrological Intensification and Regime Change From Northern Alaskan Watershed Runoff[J],2020,47(17).
APA	Arp C.D.,Whitman M.S.,Kemnitz R.,&Stuefer S.L..(2020).Evidence of Hydrological Intensification and Regime Change From Northern Alaskan Watershed Runoff.Geophysical Research Letters,47(17).
MLA	Arp C.D.,et al."Evidence of Hydrological Intensification and Regime Change From Northern Alaskan Watershed Runoff".Geophysical Research Letters 47.17(2020).