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SUMMARY:Aerosols and Ancient History in Arctic and Alpine Ice - Joe McConn
 ell\, Desert Research Institute\, current "Shackleton visiting fellow" at 
 Clare Hall
DTSTART:20191031T173000Z
DTEND:20191031T190000Z
UID:TALK132292@talks.cam.ac.uk
CONTACT:David Hodell
DESCRIPTION:Aerosol records developed from polar ice cores are powerful to
 ols for reconstructing the timing and extent of natural and anthropogenic 
 changes in Earth’s environment during past centuries to millennia. Recen
 t analytical advances enable rapid development of accurately dated aerosol
  records of sea spray\, windblown dust\, biomass burning\, volcanism\, and
  industrial activities. Here we used high-depth-resolution measurements in
  an array of 13 ice cores to develop a 3000-year\, sub-annually resolved r
 ecord of Arctic lead pollution extending from the Iron Age to present\, in
 cluding European Antiquity\, the Middle Ages\, and the Modern Period. Afte
 r describing the methods used to develop these unique pollution records\, 
 we discuss inherent uncertainties in these and all ice-core aerosol record
 s\, and interpret our records in terms of their historical implications. W
 e also present the first Alpine ice record of lead and antimony pollution 
 during Antiquity. 
LOCATION:Clare College (Latimer Room)
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