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SUMMARY:EESS talk on "Noble gas analysis in conventional and unconventiona
 l aquatic environments - a plea for simplicity"
DTSTART:20200310T121500
DTEND:20200310T130000
DTSTAMP:20260916T003930Z
UID:f5747bd6b8d2f5e066ca156fee528bbe9bc52a2fd1fa34ef5f4530cd
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Rolf Kipfer\, Research scientist\, Head of the Dept. of Wat
 er Resources and Drinking Water\, Eawag and Professor\, Institute for Biog
 eochemistry and Pollution Dynamics\, Department of Environmental System Sc
 ience (D-USYS)\, ETH Zurich\nAbstract:\nAtmospheric noble gases enter aqua
 tic systems by gas / water partitioning. Therefore\, aquatic noble gas con
 centrations in waters reflect the physical conditions prevailing during ga
 s exchange.\nConsequently\, applications of dissolved atmospheric noble ga
 ses are constrained to the analysis of gas partitioning processes between 
 phases\, but also allow the reconstruction of past environmental / climate
  conditions.\nThese concepts in concert with the mechanistic understanding
  of the gas / water partitioning in porous media allow e.g. to reconstruct
  ground water recharge in Northern America in response to the last glaciat
 ion [1\, 2].\n\nMost recently novel experimental methods enable to analyse
  the noble gas concentrations in minute amounts of water (< 1 mg) [3\, 4] 
 and to determine (noble) gas concentrations in various terrestrial fluids 
 online under field conditions [5\, 6].\nThe first method allows to retriev
 e past environmental information from noble gases in fluid inclusions in s
 peleothems whereas the second method yields information on the possible ef
 fect of CH4 formation on the mobilization on As in ground waters of Vietna
 m.\nThe presentation aims to summarize and to comment our recent developme
 nts on the application of atmospheric noble gases to study aquatic environ
 ments.\n \n[1]  Klump S. et al. (2008)\, Geology\, 36\, 395-396.\n[2]  
 Grundl T. et al. (2013) Earth Planet. Sci. Lett.\, 369-370\, 78-85.\n[3] 
  Vogel\, N. et al. (2013) Geochem. Geophys. Geosyst.\, 14\, 2432-2444.\n[4
 ]  Ghadiri\, E. et al. (2018) Earth Planet. Sci. Lett.\, 495\, 192-201.\n
 [5]  Mächler L. et al. (2012) Environ. Sci. Technol.\, 46\, 8288-8296.\n
 [6]  Brennwald M. S. et al. (2016) Environ. Sci. Technol.\, 50\, 13455-13
 463.\n 
LOCATION:GR A3 30 https://plan.epfl.ch/?room==GR%20A3%2030
STATUS:CONFIRMED
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