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@PHDTHESIS{SilvadosSantos:62637,
      author       = {Silva dos Santos, Fabio Henrique},
      title        = {{H}ydratation und {D}ehydratation in der tropischen
                      {T}ropopausenschicht},
      volume       = {4267},
      issn         = {0944-2952},
      school       = {Univ. Wuppertal},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-62637, Juel-4267},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {X, 140 p.},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012; Wuppertal, Univ.,
                      Diss., 2008},
      abstract     = {The topic of this PhD thesis is the abundance of water
                      vapour at the tropical tropopause. For this purpose
                      measurements were made with the hygrometer FISH of ICG-1
                      from the Research Centre J¨ulich onboard the hight altitude
                      aircraft Geophysica. This experimental work was carried out
                      during two field campaigns in 2005 in Brazil (TROCCINOX) and
                      Australia (SCOUT-O3). Additional data from two other
                      tropical campaigns in Africa (AMMA) and over the Indian
                      Ocean (APE-THESEO) were also analysed. A seasonal cycle of
                      the tropopause height was confirmed by the observed vertical
                      profiles of water vapour (hygropause), saturation over ice
                      and temperature (cold point tropopause). The data collected
                      during the transfer flights show a seasonal motion of the
                      tropical tropopause. The water mixing ratio in the UT/LS
                      region is controlled by two different regimes: local
                      processes below about 410 K potential temperature and large
                      scale processes above this level. A propagation of water
                      vapour in the stratosphere consistent with the tape recorder
                      theory is shown. Particles were measured during the flights
                      at the upper boundary of convection. These particles
                      evaporate before they sediment again below the tropopause.
                      Futhermore the data show that a significant quantity of
                      water — more than previously thought — is transported
                      into the stratosphere by means of convection. Isolated
                      profiles over Africa show increased water vapour in
                      unsaturated air masses in clear sky. Analysis of backward
                      trajectories in conjunction with satellite data show that it
                      originates from areas with overshooting convection. The
                      background of the measured water concentration over Africa
                      during the measurements was affected by asian monsoon
                      regions.},
      cin          = {ICG-1},
      cid          = {I:(DE-Juel1)VDB790},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/62637},
}