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Assessing the Sampling Quality of a Low-Tech Low-Budget Volume-Based Rainfall Sampler for Stable Isotope Analysis
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi.ORCID-id: 0000-0003-2530-6084
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Rekke forfattare: 52019 (engelsk)Inngår i: Frontiers in Earth Science, ISSN 2296-6463, Vol. 7, artikkel-id UNSP 244Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

To better understand the small-scale variability of rainfall and its isotopic composition it is advantageous to utilize rain samplers which are at the same time low-cost, low-tech, robust, and precise with respect to the collected rainwater isotopic composition. We assessed whether a self-built version of the Kennedy sampler is able to collect rainwater consistently without mixing with antecedent collected water. We called the self-built sampler made from honey jars and silicon tubing the Zurich sequential sampler. Two laboratory experiments show that high rainfall intensities can be sampled and that the volume of water in a water sample originating from a different bottle was generally less than 1 ml. Rainwater was collected in 5 mm increments for stable isotope analysis using three (year 2011) and five (years 2015 and 2016) rain samplers in Zurich (Switzerland) during eleven rainfall events. The standard deviation of the total rainfall amounts between the different rain gauges was <1%. The standard deviation of delta O-18 and delta H-2 among the different sequential sampler bottles filled at the same time was generally <0.3 parts per thousand for delta O-18 and <2 parts per thousand for delta H-2 (8 out of 11 events). Larger standard deviations could be explained by leaking bottle(s) with subsequent mixing of water with different isotopic composition of at least one out of the five samplers. Our assessment shows that low-cost, low-tech rain samplers, when well maintained, can be used to collect sequential samples of rainfall for stable isotope analysis and are therefore suitable to study the spatio-temporal variability of the isotopic composition of rainfall.

sted, utgiver, år, opplag, sider
2019. Vol. 7, artikkel-id UNSP 244
Emneord [en]
rainfall and its isotopic composition, sequential rainwater sampler, laboratory experiments, field test, stable isotopes (O-18 and H-2), low-cost/low-tech self-built sampler
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-175731DOI: 10.3389/feart.2019.00244ISI: 000488209400001OAI: oai:DiVA.org:su-175731DiVA, id: diva2:1369270
Tilgjengelig fra: 2019-11-11 Laget: 2019-11-11 Sist oppdatert: 2020-01-23bibliografisk kontrollert

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Fischer, Benjamin M. C.Aemisegger, FranziskaSeibert, Jan
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