Stratospheric Meteorological Conditions in the Arctic Polar Vortex, 1991 to 1992

Stratospheric meteorological conditions during the Airborne Arctic Stratospheric Expedition II (AASE II) presented excellent observational opportunities from Bangor, Maine, because the polar vortex was located over southeastern Canada for significant periods during the 1991-1992 winter. Temperature...

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Bibliographic Details
Published in:Science
Main Authors: Newman, P., Lait, L. R., Schoeberl, M., Nash, E. R., Kelly, K., Fahey, D. W., Nagatani, R., Toohey, D., Avallone, L., Anderson, J.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 1993
Subjects:
Arctic
Online Access:http://dx.doi.org/10.1126/science.261.5125.1143
https://www.science.org/doi/pdf/10.1126/science.261.5125.1143
Description
Summary:Stratospheric meteorological conditions during the Airborne Arctic Stratospheric Expedition II (AASE II) presented excellent observational opportunities from Bangor, Maine, because the polar vortex was located over southeastern Canada for significant periods during the 1991-1992 winter. Temperature analyses showed that nitric acid trihydrates (NAT temperatures below 195 k) should have formed over small regions in early December. The temperatures in the polar vortex warmed beyond NAT temperatures by late January (earlier than normal). Perturbed chemistry was found to be associated with these cold temperatures.

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