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PRODID:-//Memento EPFL//
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SUMMARY:EESS talk on "CRUSH2LIFE"
DTSTART:20181120T121500
DTEND:20181120T131500
DTSTAMP:20260406T194610Z
UID:1ab1832fc7169278bba93fe7af3012a069df7c2b42d7c58c7b6fd3d7
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Martyn Tranter\, Professor of Polar Biogeochemistry\, Brist
 ol Glaciology Centre\, School of Geographical Science\, Bristol University
 \, UK\nis Professor of Polar Biogeochemistry at the University of Bristol\
 , specialising in biogeochemical reactions in the cryosphere\, with partic
 ular expertise in the impact of cold region processes on global biogeochem
 ical cycles. He is the Lead PI on an NERC Large Grant\, Black and Bloom\, 
 was a member of the Scientific Steering Committee of the Subglacial Lake E
 llsworth Project\, and has been a long standing International Project Part
 ner with the NSF McMurdo Dry Valleys LTER Program. Recently\, he was an in
 ternational collaborator on the NSF WISSARD project\, following through to
  the NSF SALSA project (both lead by John Priscu\, Montana State)\, which 
 will access Subglacial Lake Mercer in the austral summer of 2018-19.\nAbst
 ract:\nCRUSH2LIFE: not quite blood from a stone\, but close. The productio
 n of H2 and CH4 by crushing sediment from Subglacial Lake Whillans.\n\nCRU
 SH2LIFE aims to make a fundamental advance in our understanding of how som
 e of the thermomechanical energy expended during glacial erosion is transf
 erred into compounds that underpin the existence of microbial communities 
 in subglacial environments and produce greenhouse gases (CO2 and CH4). The
  crushing of silicate rocks forms free radicles on the surface as Si-O-Si 
 bonds are broken. The Si-O• and Si• radicles produce H2 and H2O2 when 
 they interact with water. The former is directly used by microbes as an en
 ergy source\, while the latter\, we contend\, partially degrades more comp
 lex\, refractory organic matter into smaller bio-utilisable molecules. The
 se hypotheses will be illustrated using experimental data from the crushin
 g of fine-grained sediment from Subglacial Lake Whillans.\n 
LOCATION:GR A3 32 https://plan.epfl.ch/?room==GR%20A3%2032
STATUS:CONFIRMED
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