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@ARTICLE{Sahu:13170,
      author       = {Sahu, L.K. and Lal, S. and Thouret, V. and Smit, H.G.},
      title        = {{S}easonality of tropospheric ozone and water vapor over
                      {D}elhi, {I}ndia: a study based on {MOZAIC} measurement
                      data},
      journal      = {Journal of atmospheric chemistry},
      volume       = {62},
      issn         = {0167-7764},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-13170},
      pages        = {151 - 174},
      year         = {2009},
      note         = {The authors acknowledge for their strong support the
                      European Commission, Airbus, CNRS-France, FZJ-Germany and
                      the airlines (Lufthansa, Air France, Austrian and former
                      Sabena who carry free of charge the MOZAIC instrumentation
                      since 1994). We are thankful to the Indian Meteorological
                      Department (IMD), Government of India for providing us the
                      rainfall data. We are thankful to Dr. M. Kajino and Japan
                      Meteorological Agency (JMA) for providing potential
                      vorticity data. The ATSR World Fire Atlas data has been
                      taken from Ionia products of European Space Agency.},
      abstract     = {Tropospheric distributions of ozone (O-3) and water vapor
                      (H2O) have been presented based on the Measurements of OZone
                      and water vapor by Airbus In-Service AirCraft (MOZAIC) data
                      over the metro and capital city of Delhi, India during
                      1996-2001. The vertical mixing ratios of both O-3 and H2O
                      show strong seasonal variations. The mixing ratios of O-3
                      were often below 40 ppbv near the surface and higher values
                      were observed in the free troposphere during the seasons of
                      winter and spring. In the free troposphere, the high mixing
                      ratio of O-3 during the seasons of winter and spring are
                      mainly due to the long-range transport of O-3 and its
                      precursors associated with the westerly-northwesterly
                      circulation. In the lower and middle troposphere, the low
                      mixing ratios of similar to 20-30 ppbv observed during the
                      months of July-September are mainly due to prevailing summer
                      monsoon circulation over Indian subcontinent. The summer
                      monsoon circulation, southwest (SW) wind flow, transports
                      the O-3-poor marine air from the Arabian Sea and Indian
                      Ocean. The monthly averages of rainfall and mixing ratio of
                      H2O show opposite seasonal cycles to that of O-3 mixing
                      ratio in the lower and middle troposphere. The change in the
                      transport pattern also causes substantial seasonal variation
                      in the mixing ratio of H2O of 3-27 g/kg in the lower
                      troposphere over Delhi. Except for some small-scale
                      anomalies, the similar annual patterns in the mixing ratios
                      of O-3 and H2O are repeated during the different years of
                      1996-2001. The case studies based on the profiles of O-3,
                      relative humidity (RH) and temperature show distinct
                      features of vertical distribution over Delhi. The impacts of
                      long range transport of air mass from Africa, the Middle
                      East, Indian Ocean and intrusions of stratospheric O-3 have
                      also been demonstrated using the back trajectory model and
                      remote sensing data for biomass burning and forest fire
                      activities.},
      keywords     = {J (WoSType)},
      cin          = {IEK-8},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Environmental Sciences / Meteorology $\&$ Atmospheric
                      Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000275754100004},
      doi          = {10.1007/s10874-010-9146-1},
      url          = {https://juser.fz-juelich.de/record/13170},
}