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Technical note: A microcontroller-based automatic rain sampler for stable isotope studies

Michelsen, Nils ; Laube, Gerrit ; Friesen, Jan ; Weise, Stephan M. ; Bait Said, Ali Bakhit Ali ; Müller, Thomas (2019)
Technical note: A microcontroller-based automatic rain sampler for stable isotope studies.
In: Hydrology and Earth System Sciences, 2019, 23 (6)
doi: 10.5194/hess-23-2637-2019
Artikel, Zweitveröffentlichung

Kurzbeschreibung (Abstract)

Automatic samplers represent a convenient way to gather rain samples for isotope (δ 18O and δ 2H) 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.

Typ des Eintrags: Artikel
Erschienen: 2019
Autor(en): Michelsen, Nils ; Laube, Gerrit ; Friesen, Jan ; Weise, Stephan M. ; Bait Said, Ali Bakhit Ali ; Müller, Thomas
Art des Eintrags: Zweitveröffentlichung
Titel: Technical note: A microcontroller-based automatic rain sampler for stable isotope studies
Sprache: Englisch
Publikationsjahr: 2019
Publikationsdatum der Erstveröffentlichung: 2019
Verlag: Copernicus
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Hydrology and Earth System Sciences
Jahrgang/Volume einer Zeitschrift: 23
(Heft-)Nummer: 6
DOI: 10.5194/hess-23-2637-2019
URL / URN: https://doi.org/10.5194/hess-23-2637-2019
Herkunft: Zweitveröffentlichung aus gefördertem Golden Open Access
Kurzbeschreibung (Abstract):

Automatic samplers represent a convenient way to gather rain samples for isotope (δ 18O and δ 2H) 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.

URN: urn:nbn:de:tuda-tuprints-91857
Sachgruppe der Dewey Dezimalklassifikatin (DDC): 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Geowissenschaften
Hinterlegungsdatum: 20 Okt 2019 19:55
Letzte Änderung: 20 Okt 2019 19:55
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