Flights inside Vortex

90, 91, 93, 94, 95, 97

Flight # Date Launching site Instrumentation Observation
90 17/11/99 Andoya (Norway) SAOZ + Descartes  
91 28/01/00 Kiruna (Sweden) SAOZ + Descartes + CH4 + Bro  
93 13/02/00 Kiruna (Sweden) SAOZ + Descartes + CH4 + Bro  
94 27/02/00 Kiruna (Sweden) SAOZ + CH4 + Labs  
95 07/03/00 Kiruna (Sweden) SAOZ + Descartes + Labs + Bro  
97 03/04/00 Andoya (Norway) SAOZ + Descartes  

Balloon Flights inside vortex during winter 1999/2000

    Ozone evolution since early winter
  • ozone maximum descending inside vortex
    NO2 evolution since early winter
  • NO2 recovery starting above 22 km
    OClO evolution since early winter
  • no OClO in November

     
  • November, no NO2 ; the vortex is not activated: No OClO.
  • January the atmosphere is denoxified and the vortex is activated: high amounts of OClO are observed from 15 to 24 km.
  • Early February, recovery of NO2 at the top of the profile and the vortex is activated: high level of OClO observed but only below 21 km where the atmosphere is denoxified.
  • Early March the vortex is still activated: high amount of OClO are observed.
  • Early April, recovery of NO2; OClO observed below 17 km only.

    Early winter flight from Andoya 17/11/1999
  • Comparison between SAOZ, Alomar Lidar and POAM