Back
Full-text
Journal article

Marine versus Continental Sources of Iodine and Selenium in Rainfall at Two European High-Altitude Locations.

  • Suess E Institute of Biogeochemistry and Pollutant Dynamics , ETH Zurich , 8092 Zurich , Switzerland.
  • Aemisegger F Institute for Atmospheric and Climate Science , ETH Zurich , 8092 Zurich , Switzerland.
  • Sonke JE Observatoire Midi-Pyrénées, CNRS-GET , Université de Toulouse , 31400 Toulouse , France.
  • Sprenger M Institute for Atmospheric and Climate Science , ETH Zurich , 8092 Zurich , Switzerland.
  • Wernli H Institute for Atmospheric and Climate Science , ETH Zurich , 8092 Zurich , Switzerland.
  • Winkel LHE Institute of Biogeochemistry and Pollutant Dynamics , ETH Zurich , 8092 Zurich , Switzerland.
Show more…
  • 2019-01-19
Published in:
  • Environmental science & technology. - 2019
Altitude
Environmental Monitoring
France
Iodine
Selenium
Switzerland
English The essential elements selenium (Se) and iodine (I) are often present in low levels in terrestrial diets, leading to potential deficiencies. Marine I and Se emissions and subsequent atmospheric wet deposition has been suggested to be an important source of I and Se to soils and terrestrial food chains. However, the contribution of recycled moisture of continental origin to I and Se to precipitation has never been analyzed. Here we report concentrations and speciation of I and Se, as well as of bromine (Br), sulfur (S), and DOC-δ13C signatures for weekly collected precipitation samples (in the period of April 2015 to September 2016) at two high altitude sites, i.e., Jungfraujoch (JFJ; Switzerland) and Pic du Midi (PDM; France). Analysis of precipitation chemistry and moisture sources indicate combined marine and continental sources of precipitation and Se, I, Br, and S at both sites. At JFJ, concentrations of I and Se were highest when continental moisture sources were dominant, indicating important terrestrial sources for these elements. Furthermore, correlations between investigated elements and DOC-δ13C, particularly when continental moisture source contributions were high, indicate a link between these elements and the source of dissolved organic matter, especially for I (JFJ and PDM) and Se (JFJ).
Language
  • English
Open access status
hybrid
Identifiers
Persistent URL
https://sonar.ch/global/documents/229288
Statistics
Document views: 37 File downloads:
  • Full-text: 0