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@ARTICLE{Wohland:861182,
      author       = {Wohland, Jan and Omrani, Nour-Eddine and Witthaut, Dirk and
                      Keenlyside, Noel S.},
      title        = {{I}nconsistent wind speed trends in current twentieth
                      century reanalyses},
      journal      = {Journal of geophysical research / D Atmospheres D},
      volume       = {124},
      number       = {4},
      issn         = {2169-897X},
      address      = {Hoboken, NJ},
      publisher    = {Wiley},
      reportid     = {FZJ-2019-01725},
      pages        = {1931-1940},
      year         = {2019},
      abstract     = {Reanalysis data underpin much research in atmospheric and
                      related sciences. While most reanalysis only cover the last
                      couple of decades, National Oceanic and Atmospheric
                      Administration (20CR) and European Centre for Medium‐Range
                      Weather Forecasts (ERA20C and CERA20C) also developed
                      reanalyses for the entire twentieth century that
                      theoretically allow investigation of multidecadal
                      variability. However, the approaches adopted to handle the
                      massively evolving number of observations can cause spurious
                      signals. Here we focus on wind speeds, as its assimilation
                      is a key difference among these two products. We show that
                      ERA20C and CERA20C feature significant trends in the North
                      Atlantic and North Pacific wind speeds of up to 3 m/s per
                      century. We show that there is a good relation between the
                      trends in the reanalysis and assimilated wind speeds. In
                      contrast, 20CR and the European Centre for Medium‐Range
                      Weather Forecasts free model run ERA20CM do not show
                      positive trends in the same regions. As a consequence,
                      conclusions drawn from any single twentieth century
                      reanalysis should be treated cautiously in particular in
                      sectors with a strong wind dependency (e.g., wind energy).},
      cin          = {IEK-STE},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-STE-20101013},
      pnm          = {153 - Assessment of Energy Systems – Addressing Issues of
                      Energy Efficiency and Energy Security (POF3-153)},
      pid          = {G:(DE-HGF)POF3-153},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000461856300003},
      doi          = {10.1029/2018JD030083},
      url          = {https://juser.fz-juelich.de/record/861182},
}