Physics
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71..597m&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 5, p. 597-602.
Physics
2
Sprites, Morphology, Cloud Charge Height, Japanese Winter Sprites, Hokuriku Area
Scientific paper
Continuous observations of sprites in the Hokuriku area of Japan were performed from two optical sites during the three winter periods. The purpose of this observation is to study the major effect in the appearance of sprites and in determining the morphology of sprites (columns or carrots). Detailed analysis is performed based on the estimation of the height of -10 °C at the time of sprite occurrence. When the height of -10 °C is lower than 1800 m, the occurrence of sprites is infrequent, and the dominant shape is column. Then when it is increased (1800-3000 m), a new situation takes place, namely the occurrence of sprites is very enhanced and more spectacular shapes like carrots tend to be frequently observed in addition to column sprites. These sprite characteristics are first compared with those of parent lightning in the Hokuriku area and with our latest computer simulations on sprite initiation.
Asano Tetsuo
Hayakawa Masahiko
Hobara Yasuhide
Matsudo Yu
Michimoto Koichiro
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