气候变化领域集成服务门户(CCPortal): Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters

CCPortal

DOI	10.1029/2023JG007583
	Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters
	Shogren, Arial J.; Zarnetske, Jay P.; Abbott, Benjamin W.; Grose, Amelia L.; Rec, Abigail F.; Nipko, Jansen; Song, Chao; O'Donnell, Jonathan A.; Bowden, William B.
发表日期	2024
ISSN	2169-8953
EISSN	2169-8961
起始页码	129
结束页码	2
卷号	129 期号:2
英文摘要	Climate change is rapidly altering hydrological processes and consequently the structure and functioning of Arctic ecosystems. Predicting how these alterations will shape biogeochemical responses in rivers remains a major challenge. We measured [C]arbon and [N]itrogen concentrations continuously from two Arctic watersheds capturing a wide range of flow conditions to assess understudied event-scale C and N concentration-discharge (C-Q) behavior and post-event recovery of stoichiometric conditions. The watersheds represent low-gradient, tundra landscapes typical of the eastern Brooks Range on the North Slope of Alaska and are part of the Arctic Long-Term Ecological Research sites: the Kuparuk River and Oksrukuyik Creek. In both watersheds, we deployed high-frequency optical sensors to measure dissolved organic carbon (DOC), nitrate (NO3-), and total dissolved nitrogen (TDN) for five consecutive thaw seasons (2017-2021). Our analyses revealed a lag in DOC:NO3- stoichiometric recovery after a hydrologic perturbation: while DOC was consistently elevated after high flows, NO3- diluted during rainfall events and consequently, recovery in post-event concentration was delayed. Conversely, the co-enrichment of TDN at high flows, even in watersheds with relatively high N-demand, represents a potential leak of hydrologically available organic N to downstream ecosystems. Our use of high-frequency, long-term optical sensors provides an improved method to estimate carbon and nutrient budgets and stoichiometric recovery behavior across event and seasonal timescales, enabling new insights and conceptualizations of a changing Arctic, such as assessing ecosystem disturbance and recovery across multiple timescales.
英文关键词	concentration-discharge; recession; storm event; Arctic hydrochemistry
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:001158346800001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300206
作者单位	University of Alabama System; University of Alabama Tuscaloosa; Michigan State University; Brigham Young University; University of Vermont; Lanzhou University; United States Department of the Interior
推荐引用方式 GB/T 7714	Shogren, Arial J.,Zarnetske, Jay P.,Abbott, Benjamin W.,et al. Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters[J],2024,129(2).
APA	Shogren, Arial J..,Zarnetske, Jay P..,Abbott, Benjamin W..,Grose, Amelia L..,Rec, Abigail F..,...&Bowden, William B..(2024).Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,129(2).
MLA	Shogren, Arial J.,et al."Hydrology Controls Dissolved Organic Carbon and Nitrogen Export and Post-Storm Recovery in Two Arctic Headwaters".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 129.2(2024).