Search Results - "Wassenaar, L. I"

Temperature and precipitation effects on the isotopic composition of global precipitation reveal long-term climate dynamics by Vystavna, Y., Matiatos, I., Wassenaar, L. I.

“…Earth’s climate history is traced through the long-term covariance between the isotopic ( δ 18 O) composition of archived meteoric waters (groundwater, ice…”
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The Global Network of Isotopes in Rivers (GNIR): integration of water isotopes in watershed observation and riverine research by Halder, J, Terzer, S, Wassenaar, L. I, Araguás-Araguás, L. J, Aggarwal, P. K

“…We introduce a new online global database of riverine water stable isotopes (Global Network of Isotopes in Rivers, GNIR) and evaluate its longer-term data…”
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Nitrate sources and mixing in the Danube watershed: implications for transboundary river basin monitoring and management by Halder, J., Vystavna, Y., Wassenaar, L. I.

“…Dispersed and unknown pollution sources complicate water management in large transboundary watersheds. We applied stable isotopes of water and nitrate together…”
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Paleohydrogeology of the Cretaceous sediments of the Williston Basin using stable isotopes of water by Hendry, M. Jim, Barbour, S. L., Novakowski, K., Wassenaar, L. I.

“…Hydraulic and isotopic data collected from aquifers are routinely used to characterize hydrogeological conditions within sedimentary basins, but similar data…”
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Determining the stable isotope composition of pore water from saturated and unsaturated zone core: improvements to the direct vapour equilibration laser spectrometry method by Hendry, M J, Schmeling, E, Wassenaar, L I, Barbour, S L, Pratt, D

“…A method to measure the δ2H and δ18O composition of pore waters in saturated and unsaturated geologic core samples using direct vapour equilibration and laser…”
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Seeking excellence: An evaluation of 235 international laboratories conducting water isotope analyses by isotope‐ratio and laser‐absorption spectrometry by Wassenaar, L.I., Terzer‐Wassmuth, S., Douence, C., Araguas‐Araguas, L., Aggarwal, P.K., Coplen, T.B.

“…Rationale Water stable isotope ratios (δ2H and δ18O values) are widely used tracers in environmental studies; hence, accurate and precise assays are required…”
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Isotope hydrology of precipitation, surface and ground waters in the Okanagan Valley, British Columbia, Canada by Wassenaar, L.I., Athanasopoulos, P., Hendry, M.J.

“…► Relationships between water resources of the Okanagan Valley remain poorly defined. ► Stable isotopes were used to characterize rainfall, rivers and lakes,…”
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Comparative equilibration and online technique for determination of non-exchangeable hydrogen of keratins for use in animal migration studies by Wassenaar, L. I., Hobson, K. A.

“…Stable hydrogen-isotope ratios (δD) of keratin provide a novel means for tracking geographical movements of birds and other species. Here we describe a rapid,…”
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Millennial-scale diffusive migration of solutes in thick clay-rich aquitards: evidence from multiple environmental tracers by Hendry, M. Jim, Wassenaar, L. I

“…High-resolution one-dimensional profiles of naturally occurring environmental tracers (³H, δD, δ¹⁸O, ¹⁴C-DIC, ¹⁴C-DOC, ³⁶Cl, ⁴He, and major ions) and hydraulic…”
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A multi-isotope (δ13C, δ15N, δ2H) feather isoscape to assign Afrotropical migrant birds to origins by Hobson, K. A, Van Wilgenburg, S. L, Wassenaar, L. I, Powell, R. L, Still, C. J, Craine, J. M

“…A universal challenge in methodology used to study the ecology, conservation and evolutionary biology of migratory species is the quantification of…”
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Comparative microscale analysis of the effects of triclosan and triclocarban on the structure and function of river biofilm communities by Lawrence, J.R., Zhu, B., Swerhone, G.D.W., Roy, J., Wassenaar, L.I., Topp, E., Korber, D.R.

“…The broad spectrum antimicrobials triclosan (TCS) and triclocarban (TCC) are commonly detected in the environment. However, there is very limited understanding…”
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Measurement of extremely 2H-enriched water samples by laser spectrometry: application to batch electrolytic concentration of environmental tritium samples by Wassenaar, L. I., Kumar, B., Douence, C., Belachew, D. L., Aggarwal, P. K.

“…Rationale Natural water samples artificially or experimentally enriched in deuterium (2H) at concentrations up to 10,000 ppm are required for various medical,…”
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Community-Level Assessment of the Effects of the Broad-Spectrum Antimicrobial Chlorhexidine on the Outcome of River Microbial Biofilm Development by Lawrence, J.R, Zhu, B, Swerhone, G.D.W, Topp, E, Roy, J, Wassenaar, L.I, Rema, T, Korber, D.R

“…Chlorhexidine is a common-use antibacterial agent found in a range of personal-care products. We used rotating annular reactors to cultivate river biofilms…”
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Global isoscapes for δ18O and δ2H in precipitation: improved prediction using regionalized climatic regression models by S. Terzer, L. I. Wassenaar, L. J. Araguás-Araguás, P. K. Aggarwal

“…A regionalized cluster-based water isotope prediction (RCWIP) approach, based on the Global Network of Isotopes in Precipitation (GNIP), was demonstrated for…”
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Stable isotope and band-encounter analyses delineate migratory patterns and catchment areas of white-throated sparrows at a migration monitoring station by Mazerolle, D. F, Hobson, K. A, Wassenaar, L. I

“…The Canadian Migration Monitoring Network consists of several fixed migration monitoring stations (MMS) that apply constant-effort protocols to track changes…”
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Characterizing the hydrogeology of a complex clay-rich aquitard system using detailed vertical profiles of the stable isotopes of water by Hendry, M.Jim, Kelln, C.J., Wassenaar, L.I., Shaw, J.

“…High-resolution 1D profiles of the stable isotopes of porewater (δ 2H and δ 18O) obtained by direct porewater-equilibration of core samples were used to…”
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Worldwide proficiency test for routine analysis of δ2H and δ18O in water by isotope-ratio mass spectrometry and laser absorption spectroscopy by Wassenaar, L. I., Ahmad, M., Aggarwal, P., van Duren, M., Pöltenstein, L., Araguas, L., Kurttas, T.

“…RATIONALE The interpretation of stable hydrogen and oxygen isotope data in isotope hydrology relies on accurate, high‐precision analytical measurements of the…”
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Influence of Drinking Water and Diet on the Stable-Hydrogen Isotope Ratios of Animal Tissues by Hobson, Keith A., Atwell, Lisa, Wassenaar, Leonard I.

“…Despite considerable interest in using stable-hydrogen isotope ratio (δ D) measurements in ecological research, it was previously unknown whether hydrogen…”
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High-Precision Laser Spectroscopy D/H and 18O/16O Measurements of Microliter Natural Water Samples by Lis, G, Wassenaar, L. I, Hendry, M. J

“…Newly available gas analyzers based on off-axis integrated cavity output spectroscopy (OA-ICOS) lasers have been advocated as an alternative to conventional…”
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Bacteriogenic Ethane in Near-Surface Aquifers:  Implications for Leaking Hydrocarbon Well Bores by Taylor, S. W, Sherwood Lollar, B, Wassenaar, I

“…The δ13C values of methane and ethane from two near-surface aquifers in western Canada are depleted in 13C as compared to the carbon isotopic compositions of…”
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