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@ARTICLE{Jouvet:454075,
      author       = {Jouvet, Guillaume and Röllin, Stefan and Sahli, Hans and
                      Corcho, José and Gnägi, Lars and Compagno, Loris and
                      Sidler, Dominik and Schwikowski, Margit and Bauder, Andreas
                      and Funk, Martin},
      title        = {{M}apping the age of ice of {G}auligletscher combining
                      surface radionuclide contamination and ice flow modeling},
      journal      = {The Cryosphere},
      volume       = {14},
      number       = {11},
      issn         = {1994-0424},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {PUBDB-2021-00406},
      pages        = {4233 - 4251},
      year         = {2020},
      abstract     = {In the 1950s and 1960s, specific radionuclides were
                      released into the atmosphere as a result of nuclear weapons
                      testing. This radioactive fallout left its signature on the
                      accumulated layers of glaciers worldwide, thus providing a
                      tracer for ice particles traveling within the gravitational
                      ice flow and being released into the ablation zone. For
                      surface ice dating purposes, we analyze here the activity of
                      $^{239}$Pu, $^{240}$Pu and $^{236}$U radionuclides derived
                      from more than 200 ice samples collected along five
                      flowlines at the surface of Gauligletscher, Switzerland. It
                      was found that contaminations appear band-wise along most of
                      the sampled lines, revealing a V-shaped profile consistent
                      with the ice flow field already observed. Similarities to
                      activities found in ice cores permit the isochronal lines at
                      the glacier from 1960 and 1963 to be identified. Hence this
                      information is used to fine-tune an ice flow/mass balance
                      model, and to accurately map the age of the entire glacier
                      ice. Our results indicate the strong potential for combining
                      radionuclide contamination and ice flow modeling in two
                      different ways. First, such tracers provide unique
                      information on the long-term ice motion of the entire
                      glacier (and not only at its surface), and on the long-term
                      mass balance, and therefore offer an extremely valuable data
                      tool for calibrating ice flows within a model. Second, the
                      dating of surface ice is highly relevant when conducting
                      “horizontal ice core sampling”, i.e., when taking
                      chronological samples of surface ice from the distant past,
                      without having to perform expensive and logistically complex
                      deep ice-core drilling. In conclusion, our results show that
                      an airplane which crash-landed on the Gauligletscher in 1946
                      will likely soon be released from the ice close to the place
                      where pieces have emerged in recent years, thus permitting
                      the prognosis given in an earlier model to be revised
                      considerably.},
      cin          = {MPSD / CFEL-MPT},
      cid          = {I:(DE-H253)MPSD-20120731 / I:(DE-H253)CFEL-MPT-20160915},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000596668500001},
      doi          = {10.5194/tc-14-4233-2020},
      url          = {https://bib-pubdb1.desy.de/record/454075},
}