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@ARTICLE{Becker:1050086,
      author       = {Becker, Frederike and Vogel, Bärbel and Günther, Gebhard
                      and Ploeger, Felix and Riese, Martin and Rosanka, Simon and
                      Taraborrelli, Domenico and Nützel, Matthias and Jöckel,
                      Patrick and Brinkop, Sabine and Müller, Rolf},
      title        = {{U}pward transport of boundary layer air to altitudes of
                      the {A}sian summer monsoon anticyclone in {E}ulerian and
                      {L}agrangian model simulations},
      journal      = {Meteorologische Zeitschrift},
      volume       = {34},
      number       = {3},
      issn         = {0941-2948},
      address      = {Stuttgart},
      publisher    = {E. Schweizerbart Science Publishers},
      reportid     = {FZJ-2025-05794},
      pages        = {195 - 211},
      year         = {2025},
      abstract     = {The Asian summer monsoon anticyclone is a dominant
                      circulation system in the upper troposphere and
                      lowerstratosphere (UTLS) in boreal summer (about
                      June–September). An appropriate simulation of the monsoon
                      anticycloneis an important challenge for chemistry climate
                      and chemistry transport models. Here we compare simulations
                      of theECHAM5/MESSy Chemistry Climate model (EMAC) and the
                      Chemical Lagrangian Model of the Stratosphere (CLaMS)based
                      on the European Centre for Medium-Range Weather Forecasts
                      Reanalysis-Interim (ERA-Interim); EMAC simulations are
                      nudged towards ERA-Interim, whereas transport in CLaMS is
                      driven by ERA-Interim. We employ surfaceorigin tracers for
                      continental South Asia. These surface origin tracers are
                      lifted upward into the Asian summer monsoonanticyclone, both
                      in EMAC and CLaMS. We investigate monsoon conditions for
                      boreal summer 2015. In summer 2015,the entire monsoon, and
                      in particular upward transport in the monsoon anticyclone,
                      was strongly influenced by El Niño. Inboth models, in 2015,
                      the simulated impact of surface origin tracers on the
                      composition of air in the Asian summer monsoonanticyclone is
                      very weak at 420 K. Further, in both models, a very strong
                      decline with altitude (between ≈ 370–400 K) ofsurface
                      origin tracers is obvious. The pattern of the Asian monsoon
                      anticyclone in August and early September is represented
                      very similarly in EMAC and CLaMS, with a lower fraction of
                      the surface origin tracer for continental South Asia
                      inCLaMS. The simulated pattern of surface origin tracers in
                      the Asian summer monsoon anticyclone in CLaMS is much
                      lesssmooth than in EMAC. Finally, we find a strong
                      day-to-day variability in the Asian summer monsoon
                      anticyclone and aconfinement of monsoon air at UTLS
                      altitudes (≈370 K to 400 K) similarly in both, EMAC and
                      CLaMS.},
      cin          = {ICE-4},
      ddc          = {550},
      cid          = {I:(DE-Juel1)ICE-4-20101013},
      pnm          = {2112 - Climate Feedbacks (POF4-211)},
      pid          = {G:(DE-HGF)POF4-2112},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1127/metz/1266},
      url          = {https://juser.fz-juelich.de/record/1050086},
}