气候变化领域集成服务门户(CCPortal): Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape

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DOI	10.1088/1748-9326/ab57b1
	Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape
	Westergaard-Nielsen A.; Balstr m T.; Treier U.A.; Normand S.; Elberling B.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Nitrogen availability in Arctic ecosystems is a key driver for biological activity, including plant, growth and thereby directly linked to the greening of the Arctic. Here, we model the redistribution of meltwater following spring snowmelt as well as the accumulation of meltwater and dissolved nitrate at landscape scale. By combining snow mapping with unmanned aerial systems, snow chemistry, and hydrological modelling, we argue that the majority of nitrate in the snowpack is flushed out of the landscape due to the limited storage capacity of meltwater in the early growing season frozen soil. We illustrate how landscape micro-topography is a crucial parameter to quantify storage capacity of meltwater at landscape scale and thereby the associated pool of soluble compounds such as nitrate. This pool will be available for plants and may be important for plant diversity and growth rates in the wettest part of the landscape. This study illustrates that the evenly distributed nitrate input during the Arctic winter may be redistributed during the initial snowmelt and lead to marked differences in biologically available nitrate at the onset of the growing season, but also that the majority of deposited nitrate in snow is lost from the terrestrial to the aquatic environment during snowmelt. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	arctic; hydrology; nitrate; snow volume; snow water equivalents; surface flow; UAV
语种	英语
scopus关键词	Antennas; Bioactivity; Frozen soils; Hydrology; Nitrates; Snow; Snow melting systems; Topography; Unmanned aerial vehicles (UAV); Aquatic environments; arctic; Crucial parameters; Hydrological modelling; Nitrogen availability; Snow water equivalent; Surface flow; Unmanned aerial systems; Plants (botany); estimation method; glacial hydrology; meltwater; microtopography; nitrate; snow water equivalent; snowmelt; snowpack; tundra; unmanned vehicle; water storage; Arctic
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154153
作者单位	Center for Permafrost, CENPERM, University of Copenhagen, Denmark; Department of Geosciences and Natural Resource Management, University of Copenhagen, Denmark; Ecoinformatics and Biodiversity and Arctic Research Center, Department of Bioscience, Aarhus University, Denmark
推荐引用方式 GB/T 7714	Westergaard-Nielsen A.,Balstr m T.,Treier U.A.,et al. Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape[J],2020,15(3).
APA	Westergaard-Nielsen A.,Balstr m T.,Treier U.A.,Normand S.,&Elberling B..(2020).Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape.Environmental Research Letters,15(3).
MLA	Westergaard-Nielsen A.,et al."Estimating meltwater retention and associated nitrate redistribution during snowmelt in an Arctic tundra landscape".Environmental Research Letters 15.3(2020).