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@ARTICLE{Li:874962,
      author       = {Li, Dan and Vogel, Bärbel and Müller, Rolf and Bian,
                      Jianchun and Günther, Gebhard and Ploeger, Felix and Li,
                      Qian and Zhang, Jinqiang and Bai, Zhixuan and Vömel, Holger
                      and Riese, Martin},
      title        = {{D}ehydration and low ozone in the tropopause layer over
                      the {A}sian monsoon caused by tropical cyclones:
                      {L}agrangian transport calculations using {ERA}-{I}nterim
                      and {ERA}5 reanalysis data},
      journal      = {Atmospheric chemistry and physics},
      volume       = {20},
      number       = {7},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2020-01727},
      pages        = {4133 - 4152},
      year         = {2020},
      abstract     = {Low ozone and high water vapour mixing ratios are common
                      features in the Asian summer monsoon (ASM) anticyclone;
                      however, low ozone and low water vapour values were observed
                      near the tropopause over Kunming, China, within the ASM
                      using balloon-borne measurements performed during the SWOP
                      (sounding water vapour, ozone, and particle) campaign in
                      August 2009 and 2015. Here, we investigate low ozone and
                      water vapour signatures in the upper troposphere and lower
                      stratosphere (UTLS) using FengYun-2D, FengYun-2G, and Aura
                      Microwave Limb Sounder (MLS) satellite measurements and
                      backward trajectory calculations. Trajectories with
                      kinematic and diabatic vertical velocities were calculated
                      using the Chemical Lagrangian Model of the Stratosphere
                      (CLaMS) trajectory module driven by both ERA-Interim and
                      ERA5 reanalysis data.All trajectory calculations show that
                      air parcels with low ozone and low water vapour values in
                      the UTLS over Kunming measured by balloon-borne instruments
                      originate from the western Pacific boundary layer. Deep
                      convection associated with tropical cyclones over the
                      western Pacific transports ozone-poor air from the marine
                      boundary layer to the cold tropopause region. Subsequently,
                      these air parcels are mixed into the strong easterlies on
                      the southern side of the Asian summer monsoon anticyclone.
                      Air parcels are dehydrated when passing the lowest
                      temperature region (< 190 K) at the convective outflow
                      of tropical cyclones. However, trajectory calculations show
                      different vertical transport via deep convection depending
                      on the employed reanalysis data (ERA-Interim, ERA5) and
                      vertical velocities (diabatic, kinematic). Both the
                      kinematic and the diabatic trajectory calculations using
                      ERA5 data show much faster and stronger vertical transport
                      than ERA-Interim primarily because of ERA5's better spatial
                      and temporal resolution, which likely resolves convective
                      events more accurately. Our findings show that the interplay
                      between the ASM anticyclone and tropical cyclones has a
                      significant impact on the chemical composition of the UTLS
                      during summer.},
      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},
      UT           = {WOS:000525345100001},
      doi          = {10.5194/acp-20-4133-2020},
      url          = {https://juser.fz-juelich.de/record/874962},
}