Lectura de tesi:"The evolution of the Brewer-Dobson Circulation and the ozone layer during the last three decades"

  • Autor/Doctorand: Albert Ossó Castillón
  • Dia: Dijous, 10 de juliol de 2014
  • Hora: 11:30
  • Lloc: Sala de Graus (aulari)
  • Tribunal:​
    • President: Dr.  David W. J. Thompson 
    • Secretari: Dra.  Ileana Bladé Men
    • Vocal: Dr.  Álvaro Corral Cano
    • Suplents: Dr.  Ricardo García Herrera
      Dr.  Joan Bech Rustullet
      Dr.  Jordi Cunillera i Grañó
  • Directors/Tutors: Dr. Jerónimo, Lorente Castelló (Director).
  • Resum:

A number of studies based on meteorological observations and numerical simulations have shown that the GHG-induced climate change together with the emissions of Ozone-Depleting Substances (ODSs) largely impacted the stratospheric climate system. These impacts include changes in the stratospheric circulation and temperature field that together contribute to modify the chemical composition of the stratosphere, affecting for example the ozone recovery. Moreover the stratospheric climate change has also been observed to impact some tropospheric phenomena. 
In this thesis we examine the suite of currently available stratospheric temperature measurements to determine if they already reflect the predicted acceleration of the Brewer-Dobson Circulation in the stratosphere during the 21st century. Moreover we show that the North Atlantic Oscillation (NAO) not only largely impact the spatial distribution of ozone during winter as shown in a number of studies but also during summer, when the correlation between the NAO and ozone shows a reversal from winter over Southern Europe.   


Dimarts, 1 Juliol, 2014