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@ARTICLE{Mller:279616,
      author       = {Müller, S. and Hoor, P. and Bozem, H. and Gute, E. and
                      Vogel, Bärbel and Zahn, A. and Bönisch, H. and Keber, T.
                      and Krämer, Martina and Rolf, Christian and Riese, Martin
                      and Schlager, H. and Engel, A.},
      title        = {{I}mpact of the {A}sian monsoon on the extratropical lower
                      stratosphere: {T}race gas observations during {TACTS} over
                      {E}urope 2012},
      journal      = {Atmospheric chemistry and physics / Discussions},
      volume       = {15},
      issn         = {1680-7367},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2015-07500},
      pages        = {34765-34812},
      year         = {2015},
      abstract     = {The transport of air masses originating from the Asian
                      monsoon anticyclone into the extratropical upper troposphere
                      and lower stratosphere (Ex-UTLS) above potential
                      temperatures Θ = 380 K was identified during the HALO
                      aircraft mission TACTS in August and September 2012. In-situ
                      measurements of CO, O3 and N2O during TACTS Flight 2 on the
                      30 August 2012 show the irreversible mixing of aged with
                      younger (originating from the troposphere) stratospheric air
                      masses within the Ex-UTLS. Backward trajectories calculated
                      with the trajetory module of the CLaMS model indicate that
                      these tropospherically affected air masses originate from
                      the Asian monsoon anticyclone. From the monsoon circulation
                      region these air masses are quasi-isentropically transported
                      above Θ = 380 K into the Ex-UTLS where they subsequently
                      mix with stratospheric air masses. The overall trace gas
                      distribution measured during TACTS shows that this transport
                      pathway has a significant impact on the Ex-UTLS during
                      boreal summer and autumn. This leads to an intensification
                      of the tropospheric influence on the Ex-UTLS with ΔΘ > 30
                      K (relative to the tropopause) within three weeks during the
                      TACTS mission. In the same time period a weakening of the
                      tropospheric influence on the lowermost stratosphere (LMS)
                      is determined. Therefore, the study shows that the transport
                      of air masses originating from the Asian summer monsoon
                      region within the lower stratosphere above Θ = 380 K is of
                      major importance for the change of the chemical composition
                      of the Ex-UTLS from summer to autumn.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244)},
      pid          = {G:(DE-HGF)POF3-244},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/acpd-15-34765-2015},
      url          = {https://juser.fz-juelich.de/record/279616},
}