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@ARTICLE{Berkes:838694,
      author       = {Berkes, Florian and Neis, Patrick and Schultz, Martin G.
                      and Bundke, Ulrich and Rohs, Susanne and Smit, Herman G.J.
                      and Wahner, Andreas and Konopka, Paul and Boulanger, Damien
                      and Nédélec, Philippe and Thouret, Valerie and Petzold,
                      Andreas},
      title        = {{I}n situ temperature measurements in the upper troposphere
                      and lowermost stratosphere from 2 decades of {IAGOS}
                      long-term routine observation},
      journal      = {Atmospheric chemistry and physics},
      volume       = {17},
      number       = {20},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2017-07255},
      pages        = {12495 - 12508},
      year         = {2017},
      abstract     = {Despite several studies on temperature trends in the
                      tropopause region, a comprehensive understanding of the
                      evolution of temperatures in this climate-sensitive region
                      of the atmosphere remains elusive. Here we present a unique
                      global-scale, long-term data set of high-resolution in situ
                      temperature data measured aboard passenger aircraft within
                      the European Research Infrastructure IAGOS (In-service
                      Aircraft for a Global Observing System;
                      http://www.iagos.org). This data set is used to investigate
                      temperature trends within the global upper troposphere and
                      lowermost stratosphere (UTLS,  <  13 km) for the
                      period of 1995–2012 in different geographical regions and
                      vertical layers of the UTLS. The largest number of
                      observations is available over the North Atlantic. Here, a
                      neutral temperature trend is found within the lowermost
                      stratosphere. This contradicts the temperature trend in the
                      European Centre for Medium-Range Weather Forecasts (ECMWF)
                      ERA-Interim reanalysis, in which a significant $(95 \%$
                      confidence) temperature increase of +0.56 K decade−1
                      is found. Differences between trends derived from
                      observations and reanalysis data can be traced back to
                      changes in the temperature difference between observation
                      and model data over the period studied. This study underpins
                      the value of the IAGOS temperature observations as an anchor
                      point for the evaluation of reanalyses and its suitability
                      for independent trend analyses.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243) / HITEC - Helmholtz
                      Interdisciplinary Doctoral Training in Energy and Climate
                      Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-243 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000413413800001},
      doi          = {10.5194/acp-17-12495-2017},
      url          = {https://juser.fz-juelich.de/record/838694},
}