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@ARTICLE{Roy:826977,
      author       = {Roy, Chaitri and Fadnavis, Suvarna and Müller, Rolf and
                      Ayantika, D. C. and Ploeger, Felix and Rap, Alexandru},
      title        = {{I}nfluence of enhanced {A}sian
                      ${NO}\<sub\>\<i\>x\</i\>\</sub\>$ emissions on ozone in the
                      upper troposphere and lower stratosphere in
                      $chemistry\&ndash;climate$ model simulations},
      journal      = {Atmospheric chemistry and physics},
      volume       = {17},
      number       = {2},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2017-01184},
      pages        = {1297 - 1311},
      year         = {2017},
      abstract     = {The Asian summer monsoon (ASM) anticyclone is the most
                      pronounced circulation pattern in the upper troposphere and
                      lower stratosphere (UTLS) during northern hemispheric
                      summer. ASM convection plays an important role in efficient
                      vertical transport from the surface to the upper-level
                      anticyclone. In this paper we investigate the potential
                      impact of enhanced anthropogenic nitrogen oxide (NOx)
                      emissions on the distribution of ozone in the UTLS using the
                      fully coupled aerosol–chemistry–climate model,
                      ECHAM5-HAMMOZ. Ozone in the UTLS is influenced both by the
                      convective uplift of ozone precursors and by the uplift of
                      enhanced-NOx-induced tropospheric ozone anomalies. We
                      performed anthropogenic NOx emission sensitivity experiments
                      over India and China. In these simulations, covering the
                      years 2000–2010, anthropogenic NOx emissions have been
                      increased by $38 \%$ over India and by $73 \%$ over
                      China with respect to the emission base year 2000. These
                      emission increases are comparable to the observed linear
                      trends of $3.8 \%$ per year over India and $7.3 \%$ per
                      year over China during the period 2000 to 2010. Enhanced NOx
                      emissions over India by $38 \%$ and China by $73 \%$
                      increase the ozone radiative forcing in the ASM anticyclone
                      (15–40° N, 60–120° E) by 16.3 and
                      78.5 mW m−2 respectively. These elevated NOx emissions
                      produce significant warming over the Tibetan Plateau and
                      increase precipitation over India due to a strengthening of
                      the monsoon Hadley circulation. However, increase in NOx
                      emissions over India by $73 \%$ (similar to the observed
                      increase over China) results in large ozone production over
                      the Indo-Gangetic Plain and Tibetan Plateau. The higher
                      ozone concentrations, in turn, induce a reversed monsoon
                      Hadley circulation and negative precipitation anomalies over
                      India. The associated subsidence suppresses vertical
                      transport of NOx and ozone into the ASM 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},
      UT           = {WOS:000394604000004},
      doi          = {10.5194/acp-17-1297-2017},
      url          = {https://juser.fz-juelich.de/record/826977},
}