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@ARTICLE{Ploeger:1023129,
      author       = {Ploeger, Felix and Birner, Thomas and Charlesworth, Edward
                      and Konopka, Paul and Müller, Rolf},
      title        = {{M}oist bias in the {P}acific upper troposphere and lower
                      stratosphere ({UTLS}) in climate models affects regional
                      circulation patterns},
      journal      = {Atmospheric chemistry and physics},
      volume       = {24},
      number       = {3},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2024-01693},
      pages        = {2033 - 2043},
      year         = {2024},
      abstract     = {Water vapour in the upper troposphere and lower
                      stratosphere (UTLS) is a key radiative agent and a crucial
                      factor in the Earth's climate system. Here, we investigate a
                      common regional moist bias in the Pacific UTLS during
                      Northern Hemisphere summer in state-of-the-art climate
                      models. We demonstrate, through a combination of climate
                      model experiments and satellite observations, that the
                      Pacific moist bias amplifies local long-wave cooling, which
                      ultimately impacts regional circulation systems in the UTLS.
                      Related impacts involve a strengthening of isentropic
                      potential vorticity gradients, strengthened westerlies in
                      the Pacific westerly duct region, and a zonally displaced
                      anticyclonic monsoon circulation. Furthermore, we show that
                      the regional Pacific moist bias can be significantly reduced
                      by applying a Lagrangian, less-diffusive transport scheme
                      and that such a model improvement could be important for
                      improving the simulation of regional circulation systems, in
                      particular in the Asian monsoon and Pacific region.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {2112 - Climate Feedbacks (POF4-211)},
      pid          = {G:(DE-HGF)POF4-2112},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001190484800001},
      doi          = {10.5194/acp-24-2033-2024},
      url          = {https://juser.fz-juelich.de/record/1023129},
}