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DOI	10.1002/hyp.11420
	When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates
	Cui, Jiangpeng; Tian, Lide; Gibson, John J.
通讯作者	Tian, LD (通讯作者)
发表日期	2018
ISSN	0885-6087
EISSN	1099-1085
起始页码	379
结束页码	387
卷号	32 期号:3
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.
关键词	SOUTHERN TIBETAN PLATEAU STABLE-ISOTOPE MASS-BALANCE HYDROGEN ISOTOPES DEUTERIUM-EXCESS NORTHERN CANADA UNITED-STATES EVAPORATION DELTA-O-18 OXYGEN
英文关键词	isotopic survey; lake water balance; optimal sampling date; seasonal climate
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:000423341300005
来源期刊	HYDROLOGICAL PROCESSES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259305
推荐引用方式 GB/T 7714	Cui, Jiangpeng,Tian, Lide,Gibson, John J.. When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates[J]. 中国科学院青藏高原研究所,2018,32(3).
APA	Cui, Jiangpeng,Tian, Lide,&Gibson, John J..(2018).When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates.HYDROLOGICAL PROCESSES,32(3).
MLA	Cui, Jiangpeng,et al."When to conduct an isotopic survey for lake water balance evaluation in highly seasonal climates".HYDROLOGICAL PROCESSES 32.3(2018).