When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates

doi:10.1002/hyp.11420

	When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates
	Cui, JP (Cui, Jiangpeng)1,4; Tian, LD (Tian, Lide)1,2,3; Gibson, JJ (Gibson, John J.)5,6
刊名	HYDROLOGICAL PROCESSES
	2018-01-30
卷号	32 期号:3 页码:379-387
关键词	SOUTHERN TIBETAN PLATEAU STABLE-ISOTOPE MASS-BALANCE HYDROGEN ISOTOPES DEUTERIUM-EXCESS NORTHERN CANADA UNITED-STATES EVAPORATION DELTA-O-18 OXYGEN
ISSN号	0885-6087
DOI	10.1002/hyp.11420
英文摘要	One-time or short-term lake water isotopic surveys are often employed to evaluate regional lake water balance. However, it can be difficult to determine the optimal time-window for sampling to obtain a representative long-term perspective of lake water balance in settings influenced by seasonal variations in precipitation, evaporative loss, glacial/snow meltwater, and larger seasonal shifts in isotopic composition of precipitation. This is especially true for areas of the Tibetan Plateau that are influenced by the summer Indian monsoon. Although high-frequency sampling is always preferred as the most rigorous approach to characterize the water budget of lakes or watersheds, this may be impractical in remote regions and over large spatial scales. To assess the potential sensitivity of isotope balance characterization to seasonal variability, we used a weekly lake water isotope data set acquired over a period of 3years on the Tibetan Plateau to evaluate the potential inaccuracies that might have arisen from using isotopic data collected during narrower time-windows. For this assessment, we use weekly isotopic data collected during the study and assume that these sampling events were stand-alone one-time surveys. We then demonstrate the sensitivity of the isotope balance method in this setting, particularly for the rainy season that significantly underestimated the evaporation/inflow. In contrast, isotopic composition of the lake water was found to be more representative of long-term conditions when sampled in October on the Tibetan Plateau. To broaden our evaluation of seasonality effects over a range of climatic zones, published high-frequency isotopic data were also compiled, and a similar assessment was carried out for selected regions of the world. The synthesized data and model outputs, which confirm pronounced variations in lake water isotopic composition and evaporation/inflow across a range of seasonal climates, were used to determine optimal sampling windows for these specific regions.
WOS研究方向	Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000423341300005
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8755]
专题	青藏高原研究所_图书馆
作者单位	1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Plateau Environm Change & Land Su, Beijing 100101, Peoples R China; 2.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650091, Yunnan, Peoples R China; 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.[Gibson, John J.] InnoTech Alberta, 3-4476 Markham St, Victoria, BC, Canada; 6.[Gibson, John J.] Univ Victoria, Dept Geog, POB 3060 STN CSC, Victoria, BC, Canada.
推荐引用方式 GB/T 7714	Cui, JP ,Tian, LD ,Gibson, JJ . When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates[J]. HYDROLOGICAL PROCESSES,2018,32(3):379-387.
APA	Cui, JP ,Tian, LD ,&Gibson, JJ .(2018).When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates.HYDROLOGICAL PROCESSES,32(3),379-387.
MLA	Cui, JP ,et al."When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates".HYDROLOGICAL PROCESSES 32.3(2018):379-387.