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@ARTICLE{Roy:825118,
      author       = {Roy, Chaitri and Fadnavis, Suvarna and Müller, Rolf and
                      Chaudhary, Ayantika Dey and Ploeger, Felix},
      title        = {{I}nfluence of enhanced {A}sian {NO}$_{x}$ emissions on
                      ozone in the {U}pper {T}roposphere and {L}ower
                      {S}tratosphere ({UTLS}) in chemistry climate model
                      simulations},
      journal      = {Atmospheric chemistry and physics / Discussions},
      volume       = {},
      issn         = {1680-7375},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2016-07595},
      pages        = {},
      year         = {2016},
      abstract     = {Asian summer monsoon convection plays an important role in
                      efficient vertical transport from the surface to the
                      anticyclone. In this paper we investigate the potential
                      impact of convectively transported anthropogenic nitrogen
                      oxides (NOx) on the distribution of ozone in the Upper
                      Troposphere and Lower Stratosphere (UTLS) from simulations
                      with the fully-coupled aerosol chemistry climate model,
                      ECHAM5-HAMMOZ. We performed anthropogenic NOx emission
                      sensitivity experiments over India and China. In these
                      simulations, anthropogenic NOx emissions for the period
                      2000–2010 have been increased by $38 \%$ over India and
                      by $73 \%$ over China in accordance with satellite
                      observed trends over India of $3.8 \%$ per year and China
                      of $7.3 \%$ per year. These NOx emission sensitivity
                      simulations show that strong convection over the Bay of
                      Bengal and the Southern slopes of the Himalayas transports
                      Indian emissions into the UTLS. Convective transport from
                      the South China Sea injects Chinese emissions into the lower
                      stratosphere. Indian and Chinese emissions are partially
                      transported over the Arabian Sea and west Asia by the
                      tropical easterly jet. Enhanced NOx emissions over India and
                      China increase the ozone radiative forcing over India by
                      0.112 W/m2 and 0.121 W/m2 respectively. These elevated
                      emissions produces significant warming over the Tibetan
                      Plateau and increase precipitation over India due to a
                      strengthening of the monsoon Hadley circulation.However
                      doubling of NOx emissions over India $(73 \%);$ equal to
                      China, produced high ozone in the lower troposphere. It
                      induced a reverse monsoon Hadley circulation and negative
                      precipitation anomalies over India. The associated
                      subsidence suppressed vertical transport of NOx and ozone
                      into the anticyclone.},
      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/acp-2016-582},
      url          = {https://juser.fz-juelich.de/record/825118},
}