气候变化领域集成服务门户(CCPortal): We cannot shrug off the shoulder seasons: Addressing knowledge and data gaps in an Arctic headwater

CCPortal

DOI	10.1088/1748-9326/ab9d3c
	We cannot shrug off the shoulder seasons: Addressing knowledge and data gaps in an Arctic headwater
	Shogren A.J.; Zarnetske J.P.; Abbott B.W.; Iannucci F.; Bowden W.B.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	As environmental change in the Arctic accelerates, there is a growing need to accurately quantify the response of Arctic ecosystems throughout the year. To assess the temporal coverage of observations of carbon and nutrient fluxes, we used literature synthesis, quantitative meta-analysis, and exploration of a novel biogeochemical dataset from one of the best-documented Arctic ecosystems: the headwaters of the Kuparuk River in Northern Alaska. The meta-analysis of 204 peer-reviewed studies revealed a strong temporal gap in observations of biogeochemistry and hydrology of the Kuparuk River, with substantially fewer observations from the early and late ‘shoulders’ of the thaw season (defined as the period before snowmelt or after plant senescence). To test and illustrate how much this bias might influence fundamental ecosystem level measurements, such as riverine carbon and nutrient fluxes, we used high-frequency, in-situ water chemistry sensors to estimate riverine export budgets across the thaw season for dissolved organic carbon (DOC) and nitrate (NO3−) in the Kuparuk headwaters. With this novel dataset, we found that a large proportion (~30%) of the annual export of DOC and NO3− occurred during the shoulder seasons, which are not well characterized even for this well-documented Arctic system. These analyses raise the broader question: what ecological information are we missing by giving these seasons the ‘cold shoulder’? As climate change alters seasonality, filling this major data gap in the shoulder seasons is crucial to understand the response of Arctic ecosystems. © 2020 The Author(s). Published by IOP Publishing Ltd
英文关键词	Arctic biogeochemistry; Ecosystem budgets; In-situ sensors; Kuparuk River; Meta-analysis; Riverine solute flux; Seasonality
语种	英语
scopus关键词	Analytical geochemistry; Biogeochemistry; Budget control; Climate change; Large dataset; Nutrients; Organic carbon; Stream flow; Thawing; Dissolved organic carbon; Ecological information; Ecosystem levels; Environmental change; High frequency HF; Nutrient fluxes; Temporal coverage; Water chemistry; Ecosystems; biogeochemistry; dissolved organic carbon; ecosystem approach; environmental change; headwater; hydrogeochemistry; hydrological regime; meta-analysis; nitrate; Alaska; Arctic; Kuparuk River; United States
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/153653
作者单位	Department of Earth and Environmental Sciences, Michigan State University, 288 Farm Lane, East Lansing, MI 48823, United States; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT 84602, United States; University of Vermont, Rubenstein School of the Environment and Natural Resources, Burlington, VT 05405, United States
推荐引用方式 GB/T 7714	Shogren A.J.,Zarnetske J.P.,Abbott B.W.,et al. We cannot shrug off the shoulder seasons: Addressing knowledge and data gaps in an Arctic headwater[J],2020,15(10).
APA	Shogren A.J.,Zarnetske J.P.,Abbott B.W.,Iannucci F.,&Bowden W.B..(2020).We cannot shrug off the shoulder seasons: Addressing knowledge and data gaps in an Arctic headwater.Environmental Research Letters,15(10).
MLA	Shogren A.J.,et al."We cannot shrug off the shoulder seasons: Addressing knowledge and data gaps in an Arctic headwater".Environmental Research Letters 15.10(2020).