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@ARTICLE{Sahu:13171,
      author       = {Sahu, L.K. and Lal, S. and Thouret, V. and Smit, H.G.},
      title        = {{C}limatology of tropospheric ozone and water vapour over
                      {C}hennai: a study based on {MOZAIC} measurements over
                      {I}ndia},
      journal      = {International journal of climatology},
      volume       = {31},
      issn         = {0899-8418},
      address      = {Chichester [u.a.]},
      publisher    = {Wiley},
      reportid     = {PreJuSER-13171},
      pages        = {920 - 936},
      year         = {2011},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Climatology of tropospheric ozone (O-3) and water vapour
                      (H2O) over a metro city of Chennai in southern India has
                      been presented based on the Measurements of OZone and water
                      vapour by Airbus I n-service AirCraft (MOZAIC) data during
                      1996-2001. The seasonal trends in mixing ratio of O-3 are
                      discussed in view of annual changes in the transport
                      pattern, rainfall, and its relationship with ambient H2O.
                      The vertical distributions of both O-3 and H2O show large
                      seasonal variations. The observed high mixing ratios of O-3
                      in winter and spring months can be attributed to long-range
                      transport of pollutants by the northwesterly winds
                      associated with winter monsoon circulation. The lowest
                      mixing ratio of 15 ppbv of O-3 from July to September
                      coincides with the summer monsoon circulation over Indian
                      subcontinent. The surface level mixing ratio of O-3 was
                      observed to be below 30 ppbv throughout the year. On the
                      other hand, monthly rainfall and vertical distributions of
                      H2O show just opposite seasonal variations to that of O-3
                      mixing ratio. Chennai is a coastal city; therefore, the
                      seasonal change in surface wind flow causes large
                      variability in H2O concentrations of 6-30 g/kg in the lower
                      troposphere. More or less similar annual patterns of mixing
                      ratios of O-3 and H2O are repeated during different years of
                      1996-1998, except for some small-scale differences. High
                      level of O-3 mixing ratio, particularly during the early
                      winter months of year 1997, seems unusual as we do not see
                      such trends for other year of measurements over Chennai. The
                      case studies of profiles of O-3, relative humidity (RH), and
                      temperature in view of long-range transport over Chennai
                      during the different seasons have been also discussed.
                      Significant enhancements in tropospheric O-3 were observed
                      over Chennai due to transport of air from forest fire
                      regions of Indonesia during October 1997. Copyright (c) 2010
                      Royal Meteorological Society},
      keywords     = {J (WoSType)},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000289696200010},
      doi          = {10.1002/joc.2128},
      url          = {https://juser.fz-juelich.de/record/13171},
}