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DESCRIPTION:The title of my presentation is the same as the title of a book
  on mineral dust that I edited recently together with Peter Knippertz\, a 
 meteorologist working in Karlsruhe and with whom I have organised some dus
 ty sessions for the European Geosciences Union annual meetings in Vienna. 
 With the book we have attempted to give a comprehensive overview of the fu
 ll range of current dust research and the underpinning fundamental scienti
 fic concepts while at the same time explaining concrete applications of th
 is science.\nAs a marine geologist\, I have a rather biased view on minera
 l dust\, of which I would like to present a few examples in the presentati
 on\, focussing on past Saharan dust in marine sediment cores as well as mo
 dern dust deposition and its marine environmental effects on the Atlantic 
 Ocean.\nOn a geological time scale the seasonal/monsoonal precipitation in
  sub-Saharan Africa has shifted zonally\, causing abrupt and persistent dr
 oughts whenever the summer rains were concentrated further South than at p
 resent. These wet-dry alternations are recorded in the marine sediment arc
 hive where aeolian dust and fluvial mud are deposited depending on the env
 ironmental conditions on land. In addition to the natural variability\, la
 nd-use plays an active role in the mobilisation of soils as well.\nIn this
  talk I will give some examples of studies carried out on deep-sea sedimen
 ts retrieved off NW Africa with the aim to reconstruct palaeo-environmenta
 l conditions in the source area(s) of Saharan dust. The proxies I will pre
 sent are bulk-chemical composition\, Sr/Nd isotopes\, and particle-size di
 stribution of the terrigenous sediment fraction. The derived aridity recor
 ds from sediment cores off Mauritania have varying temporal resolution thr
 oughout the Late Quaternary.\nIn addition\, I will attempt to ground-truth
  the inferences made from the sediment archive with modern data from sedim
 ent traps that have collected dust over the past few decades and ongoing. 
 The combination of proxies and modern observations offers the unique oppor
 tunity to study in high detail the natural versus anthropogenic dust produ
 ction and transport\, as well as their marine environmental effects.\n \n*
 **\nInvited by Ulrich Hambach\, Geomorphology
DTSTART;TZID=Europe/Berlin:20150618T120000
DTEND;TZID=Europe/Berlin:20150618T133000
LOCATION:H6\, Geo
SUMMARY:Dr. Jan Berend Stuut\, Royal Netherlands Institute for Sea Research
 \, NL / Center for Marine Environmental Sciences\, DE (Homepage): Mineral 
 Dust - A Key Player in the Earth System
TRANSP:TRANSPARENT
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