% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Tarasick:276602,
      author       = {Tarasick, D. W. and Davies, J. and Smit, Herman G.J. and
                      Oltmans, S. J.},
      title        = {{A} re-evaluated {C}anadian ozonesonde record: measurements
                      of the vertical distribution of ozone over {C}anada from
                      1966 to 2013},
      journal      = {Atmospheric measurement techniques discussions},
      volume       = {8},
      number       = {5},
      issn         = {1867-8610},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {FZJ-2015-06956},
      pages        = {5215 - 5264},
      year         = {2015},
      abstract     = {In Canada routine ozone soundings have been carried at
                      Resolute Bay since 1966, making this record the longest in
                      the world. Similar measurements started in the 1970s at
                      three other sites, and the network was expanded in stages to
                      10 sites by 2003. This important record for understanding
                      long-term changes in tropospheric and stratospheric ozone
                      has been re-evaluated as part of the
                      SPARC/IO3C/IGACO-O3/NDACC (SI2N) initiative. The
                      Brewer–Mast sonde, used in the Canadian network until
                      1980, is different in construction from the ECC sonde, and
                      the ECC sonde itself has also undergone a variety of minor
                      design changes over the period 1980–2013. Corrections have
                      been made for the estimated effects of these changes, to
                      produce a more homogeneous dataset.The effect of the
                      corrections is generally modest, and so should not
                      invalidate past analyses that have used Canadian network
                      data. However, the overall result is entirely positive: the
                      comparison with co-located total ozone spectrometers is
                      improved, in terms of both bias and SD, and trends in the
                      bias have been reduced or eliminated. An uncertainty
                      analysis (including the additional uncertainty from the
                      corrections, where appropriate) has also been conducted, and
                      the altitude-dependent estimated uncertainty is included
                      with each revised profile.The resulting time series show
                      negative trends in the lower stratosphere of up to $5\%$
                      decade−1 for the period 1966–2013. Most of this decline
                      occurred before 1997, and linear trends for the more recent
                      period are generally not significant. The time series also
                      show large variations from year to year. Some of these
                      anomalies can be related to cold winters (in the Arctic
                      stratosphere), or changes in the Brewer–Dobson
                      circulation, which may thereby be influencing trends.In the
                      troposphere trends for the 48 year period are small, and for
                      the most part not significant. This suggests that ozone
                      levels in the free troposphere over Canada have not changed
                      significantly in nearly 50 years.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243)},
      pid          = {G:(DE-HGF)POF3-243},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/amtd-8-5215-2015},
      url          = {https://juser.fz-juelich.de/record/276602},
}