Letter to the Editor: A strange cloud in the Arctic summer stratosphere 1998 above Esrange (68°N), Sweden

• Published in: Annales Geophysicae
• Main Authors: Siebert, J., Timmis, C., Vaughan, G., Fricke, K. H.
• Format: Text
• Language: English
• Published: 2018
• Subjects: Arctic; Canada; Esrange; Korovin; Aleutian Islands
• Online Access: https://doi.org/10.1007/s00585-000-0505-0; https://angeo.copernicus.org/articles/18/505/2000/

When the University of Bonn lidar on the Esrange (68°N, 21°E), Sweden, was switched on in the evening of July 18, 1998, a geometrically and optically thin cloud layer was present near 14 km altitude or 400 K potential temperature, where it persisted for two hours. The tropopause altitude was 4 km be...