Arctic PSCs observed with ILAS during the winter of 1996/1997: Analysis of temperature

• Main Authors: N. Saitoh, S. Hayashida, H. Nakajima, Y. Sasano
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Ilas
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.483.8079; http://www.ics.nara-wu.ac.jp/lab/ozonegroup/pdf/213-QOS2000.pdf

trometer (ILAS) captured many Polar Stratospheric Cloud (PSC) events during the winter and early spring of 1997 in the Northern Hemisphere [Hayashida et al., 2000]. To infer the chemical composition of the observed PSC particles, the ILAS aerosol extinction coefficient data and nitric acid data were compared with the pre-dicted values assuming the formation of super-cooled ternary solution (STS), nitric acid dihydrate (NAD) or nitric acid trihydrate (NAT) particles. The intensive analysis suggested the formation of type Ia and Ib PSC particles during the operation of the ILAS. The tempera-ture histories of all of the observed PSC particles were examined, and we found some events whose histories were theoretically required for the formation of liquid or solid particles.