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Multiwavelength lidar observation of thin cirrus at the base of the Pinatubo stratospheric layer during the EASOE Campaign
Author(s) -
Del Guasta Massimo,
Morandi Marco,
Stefanutti Leopoldo,
Stein Bernhard,
Kolenda Jurgen,
Rairoux Patrick,
Wolf J. P.,
Matthey Renaud,
Kyro Esko
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl03077
Subject(s) - cirrus , lidar , atmospheric sciences , stratosphere , aerosol , wavelength , environmental science , depolarization ratio , materials science , geology , meteorology , remote sensing , physics , optoelectronics
Multiwavelength lidar measurements carried out in Sodankylä (Finland, 66°N) during EASOE campaign showed high cirrus clouds growing at the base or within Pinatubo aerosol layer. The temperature was generally below −35°C. The mean peak depolarization at 532 nm for all the campaign was 28%, comparable to the values measured in polar cirrus clouds, observed in Dumont d'Urville (Antarctica, 62°S) during 1989, well before the Pinatubo eruption. Optical depth at 532 nm was smaller than 0.3 (thin cirrus). A wavelength dependency was observed in EASOE cirrus backscattering, suggesting a major presence of submicron and micron‐sized particles. Such a presence could explain the low depolarization values.