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SUMMARY:EESS talk on "Coupled iron and carbon dynamics in Icelandic wetlan
 d soils"
DTSTART:20230523T121500
DTEND:20230523T131500
DTSTAMP:20260928T175415Z
UID:64c138981b43707f2b67ecda6a17c7f1ccd38a457a907a8b02fc16a4
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof.Laurel Thomas Arrigo\, Environmental Chemistry Group\, Un
 iversité de Neuchâtel  \nAbstract:\nThe volcanic-influenced soils of Ic
 eland store an estimated ~2.1 Pg of soil organic carbon\, much of which is
  found in mineral rich wetlands. However\, climate change is impacting Ice
 landic soils\, with warming soil temperatures and thawing permafrost leadi
 ng to shifts in hydrologic regimes and changes in soil redox conditions. U
 nder oxygen-limited conditions\, mineral phases containing redox-active el
 ements like iron are used as electron acceptors during microbial respirati
 on. Yet our understanding of how changing redox conditions affects iron bi
 ogeochemistry and the associated impact on the storage of organic carbon i
 n Icelandic soils remains largely unknown.\nHere\, I will present recent a
 nd ongoing work exploring the coupled biogeochemical cycling of iron and c
 arbon in Icelandic soils. First\, I will report on mineral and elemental c
 haracterization results of iron- and carbon rich field samples collected a
 cross western Iceland. I will then examine the links between iron mineral 
 transformations and the mobilization and mineralization of mineral-associa
 ted organic carbon in soil incubations. Collectively\, these results contr
 ibute to a better understanding of the nature of iron mineral-SOC interact
 ions in Icelandic soils and provide insight into mechanisms and vulnerabil
 ities of iron mineral protection of organic carbon.\n\nShort biography:\nL
 aurel ThomasArrigo is Professor of Environmental Chemistry in the Institut
 e of Chemistry at the University of Neuchâtel. Her research focuses on th
 e biogeochemical cycling of elements and nutrients in soils and sediments 
 and combines field- and laboratory-based methods with wet chemistry and sp
 ectroscopic techniques. Laurel completed her PhD in Soil Chemistry at ETH 
 Zurich in 2017 and continued on as a Postdoc and Research Associate\, wher
 e her research focused on the influence of organic matter during iron mine
 ral transformations. In 2023\, Laurel joined the University of Neuchâtel 
 to lead the new Environmental Chemistry group.\n 
LOCATION:ALP 1 109 https://plan.epfl.ch/?room==ALP%201%20109 https://epfl.
 zoom.us/j/69011077410
STATUS:CONFIRMED
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