气候变化领域集成服务门户(CCPortal): Technical note: A microcontroller-based automatic rain sampler for stable isotope studies

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DOI	10.5194/hess-23-2637-2019
	Technical note: A microcontroller-based automatic rain sampler for stable isotope studies
	Michelsen N.; Laube G.; Friesen J.; Weise S.M.; Bakhit Ali Bait Said A.; Müller T.
发表日期	2019
ISSN	1027-5606
起始页码	2637
结束页码	2645
卷号	23 期号:6
英文摘要	Automatic samplers represent a convenient way to gather rain samples for isotope (δ18O and δ2H) and water quality analyses. Yet, most commercial collectors are expensive and do not reduce post-sampling evaporation and the associated isotope fractionation sufficiently. Thus, we have developed a microcontroller-based automatic rain sampler for timer-actuated collection of integral rain samples. Sampling periods are freely selectable (minutes to weeks), and the device is low-cost, simple, robust, and customizable. Moreover, a combination of design features reliably minimizes evaporation from the collection bottles. Evaporative losses were assessed by placing the pre-filled sampler in a laboratory oven with which a diurnal temperature regime (21-31 °C) was simulated for 26 weeks. At the end of the test, all bottles had lost less than 1% of the original water amount, and all isotope shifts were within the analytical precision. These results show that even multi-week field deployments of the device would result in rather small evaporative mass losses and isotope shifts. Hence, we deem our sampler a useful addition to devices that are currently commercially available and/or described in the scientific literature. To enable reproduction, all relevant details on hard- and software are openly accessible. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	Evaporation; Microcontrollers; Rain; Water quality; Analytical precision; Diurnal temperatures; Evaporative loss; Field deployment; Isotope fractionation; Microcontroller-based; Scientific literature; Water quality analysis; Isotopes; instrumentation; isotopic analysis; isotopic fractionation; laboratory method; sampler; software; stable isotope; temperature effect; water quality
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159664
作者单位	Michelsen, N., Institute of Applied Geosciences, Technische Universität Darmstadt, Darmstadt, 64287, Germany; Laube, G., Department of Hydrogeology, UFZ Helmholtz Centre for Environmental Research, Leipzig, 04318, Germany; Friesen, J., Department of Catchment Hydrology, UFZ Helmholtz Centre for Environmental Research, Halle, 06120, Germany; Weise, S.M., Department of Catchment Hydrology, UFZ Helmholtz Centre for Environmental Research, Halle, 06120, Germany; Bakhit Ali Bait Said, A., Ministry of Regional Municipalities and Water Resources, Salalah, Oman; Müller, T., Department of Hydrogeology, UFZ Helmholtz Centre for Environmental Research, Leipzig, 04318, Germany
推荐引用方式 GB/T 7714	Michelsen N.,Laube G.,Friesen J.,et al. Technical note: A microcontroller-based automatic rain sampler for stable isotope studies[J],2019,23(6).
APA	Michelsen N.,Laube G.,Friesen J.,Weise S.M.,Bakhit Ali Bait Said A.,&Müller T..(2019).Technical note: A microcontroller-based automatic rain sampler for stable isotope studies.Hydrology and Earth System Sciences,23(6).
MLA	Michelsen N.,et al."Technical note: A microcontroller-based automatic rain sampler for stable isotope studies".Hydrology and Earth System Sciences 23.6(2019).