Skip to Main content Skip to Navigation
Journal articles

PSC and volcanic aerosol observations during EASOE by UV-visible ground-based spectrometry

Abstract : Twilight sky colour measurements were made using ground-based UV-visible SAOZ spectrometers at four stations along the Arctic circle during EASOE. The results show that volcanic aerosol from the Pinatubo eruption of June 1991 first appeared above the Arctic in September 1991. The aerosol layer thickened progressively during the autumn and had spread to all four stations, outside in the very low stratosphere, as well as inside the polar vortex, by mid-January. For the rest of the campaign, to mid-March, little further change was seen. The aerosol would have masked any PSCs that may have occurred at altitudes less than 22 km. However, PSCs at higher altitudes should have been detected, had their optical thickness exceeded 0.01. Only one was recorded during EASOE: on 28–29 December 1991, in contrast to their frequent occurrence in January and early February 1990.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03354824
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Tuesday, December 28, 2021 - 5:00:12 PM
Last modification on : Wednesday, December 29, 2021 - 3:30:39 AM
Long-term archiving on: : Tuesday, March 29, 2022 - 6:28:48 PM

File

ark _67375_WNG-RS63TDNL-V.pdf
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Citation

Alain Sarkissian, Jean-Pierre Pommereau, Florence Goutail, Esko Kyro. PSC and volcanic aerosol observations during EASOE by UV-visible ground-based spectrometry. Geophysical Research Letters, American Geophysical Union, 1994, 21 (13), pp.1319-1322. ⟨10.1029/93GL03072⟩. ⟨insu-03354824⟩

Share

Metrics

Record views

45

Files downloads

20