LARGE SIZE LIQUID PSC PARTICLES OBSERVED OVER NY-ALESUMD

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概要

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• Polar stratospheric clouds (PSCs) were observed by lidar at Ny-Alesund, Spitsbergen in December 1994 and January 1995. The backscattering coefficient at wavelengths of 1064nm and 532nm, and the depolarization ratio of PSCs at 532nm, were measured by the lidar system. The stratospheric temperature from mid-December to mid-January was below the estimated frost point of nitric acid tri-hydrate (NAT) in winter 1994/1995. PSCs were observed more frequently in this low temperature period than in previous winters since 1991. The characteristics of the PSCs observed by lidar were very variable, but had a noticeable vertical "sandwich" structure in January in which a layer of liquid PSC particles at altitude around 20km existed between two solid particle layers. The wavelength dependence of the backscattering shows that the size of both liquid and solid particles was larger than the average size of background stratospheric aerosols. Lidar observations of liquid layer particles show characteristics in qualitative agreement with those expected from model PSC particles grown in ternary solutions of H_2SO_4,HNO_3,and H_2O with a temperature decrease. However, the observed backscattering coefficient and its wavelength dependence indicate that PSC particles require further growth than that predicted by the ternary solution model at temperature at which most HNO_3 molecules in the surrounding atmosphere are considered to be condensed on PSCs.

• 国立極地研究所の論文

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.

• Nagatani Masahiro

  Solar Terrestrial Environment Laboratory, Nagoya 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

• ADACHI Hiroshi

  Solar Terrestrial Environment Laboratory, Nagoya University

• SAKAI Tetsu

  Solar Terrestrial Environment Laboratory, Nagoya University

• HAYASHI Masahiko

  Solar Terrestrial Environment Laboratory, Nagoya University

• SUSUMU Kazumi

  Department of Applied Physics, Fukuoka University

• NAKURA Yoshinobu

  Department of Applied Physics, Fukuoka University

• Yashinobu Nakura

  Department of Applied Physics, Fukuoka University

• Iwasaka Y

  Solar-terrestrial Environment Laboratory Nagoya University

• Nagatani Masahiro

  Solar Terrestrial Environment Laboratory Nagoya Univ.

• Nagatani Masahiro

  Solar-terrestrial Environment Laboratory Nagoya University

• Susumu Kazumi

  Department Of Applied Physics Fukuoka 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

• Hayashi Masahiko

  Solar Terrestrial Environment Laboratory Nagoya University

• Adachi Hiroshi

  Solar Terrestrial Environment Laboratory Nagoya University

• Fujiwara Motowo

  Department Of Applied Physics Faculty Of Science Fukuoka University

• Yashinobu Nakura

  Department Of Applied Physics 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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