LIDAR OBSERVATION ABOVE SVALBARD, NORWAY IN THE WINTER OF 1996/97 : Characteristics of Backscattering Ratio and Depolarization Ratio of PSC Particles

元データ 国立極地研究所

概要

Lidar observations of polar stratospheric clouds (PSCs) were performed in the winter of 1996/97 at Ny-Alesund, Svalbard, Norway (79°N, 12°E). Corresponding to the appearance of an area colder than the estimated frost point of nitric acid trihydrate (NAT) above Ny-Alesund, PSCs were observed intermittently. As the temperature is lower than the NAT frost point, the peaks of scattering ratio (R) tend to increase and most PSC layers with large enhancement in R show negative correlation between R and depolarization ratio (δ). This suggests that the PSC layers were composed of liquid or small particles, which showed small values of δ even though the temperature was very low in that height range. During the period when the temperature profile showed large wave-like fluctuations, the detected PSCs varied remarkably in time and space. Heights of R peaks observed during that period did not conincide with the temperature minima which were measured once a day by rawinsonde.

著者

Shibata T Graduate School Of Environmental Studies Nagoya Univ.
Iwasaka Y Graduate School Of Environmental Studies Nagoya Univ.
Iwasaka Yasunobu Solar-terrestrial Environment Laboratory Nagoya University
Iwasaka Y Nagoya Univ. Nagoya Jpn
Shiraishi Kouichi Fukuoka Univ.
SHIRAISHI Kouichi Department of Earth System Science, Faculty of Science, Fukuoka University
FUJIWARA Motowo Department of Earth System Science, Faculty of Science, Fukuoka University
Shibata Takashi Solar Terrestrial Environment Laboratory, Nagoya University
AYUKAWA Shigeru Department of Applied Physics, Fukuoka University
ADACHI Hiroshi Solar Terrestrial Environment Laboratory, Nagoya University
SAKAI Tetsu Solar Terrestrial Environment Laboratory, Nagoya University
TAMURA Kouichi Solar Terrestrial Environment Laboratory, Nagoya University
Iwasaka Y Solar-terrestrial Environment Laboratory Nagoya University
Iwasaka Yasunobu Graduate School Of Environmental Studies Nagoya Univ.
Iwasaka Yasunobu Unmanned Aircraft Planning Group:solar Terrestrial Environmental Laboratory Nagoya University:nihon
Iwasaka Yasunobu Solar Terrestrial Environment Laboratory Nagoya University
Fujiwara M Fukuoka Univ.
Fujiwara Motoo Faculty Of Science Fukuoka University
Tamura Kouichi Solar Terrestrial Environment Laboratory Nagoya University
Adachi Hiroshi Solar Terrestrial Environment Laboratory Nagoya University
Ayukawa Shigeru Department Of Applied Physics Fukuoka University
Fujiwara Motowo Department Of Applied Physics Faculty Of Science Fukuoka University
Fujiwara Motowo Department Of Applied Physics Fukuoka University
Shiraishi Koichi Department Of Applied Physics Fukuoka University
Shibata T Kitami Institute Of Technology
Shiraishi Kouichi Department Of Earth System Science Faculty Of Science Fukuoka University
Shibata Takashi Solar Terrestrial Environment Laboratory Nagoya University
Shiraishi Kouichi Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.
Fujiwara Motowo Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.

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