Tenki, Vol. 63, No. 3

(Tenki is the bulletin journal of the Meteorological Society of Japan in Japanese.)

TENKI, Vol. 63, No. 3, pp. 157-171, 2016

Comments on the Advance Line of Cloud Seeding Experiment for
Precipitation Augmentation (Meteorological Research Note 231) and
Explanation on the Efficiency of Liquid Carbon Dioxide Seeding

By
Taichi MAKI*1, Osamu MORITA*2, Yoshinori SUZUKI*3 and
Kenji WAKIMIZU*4

*1 (Corresponding author) Professor Emeritus of Kyushu University, 6-10-1 Hakozaki, Fukuoka, 812-8581, Japan.
*2 Fukuoka University.
*3 Professor Emeritus of Kyushu University.
*4 Kyushu University.

(Received 18 August 2015; Accepted 6 November 2015)

Abstract

On the opportunity of the drought in summer, 2005 in the Western Japan of Shikoku, Kyushu and so on, the project of Japanese Cloud Seeding Experiments for Precipitation Augmentation supported by the Special Coordination Funds for Promoting Science and Technology was carried out in the period of fiscal 2006 to 2010. The research report was published by MSJ as the Advance Line of Cloud Seeding Experiment for Precipitation Augmentation, Meteorological Note No. 231, 2015. In this short paper, the authors commented on some contents or subjects in a principal research result in the report, and moreover, several questions was shown comparing with on the techniques of dry ice and liquid carbon dioxide (LC) of artificial rainfall. Last of all, the authors introduced the recent experiment results on the artificial rainfall of LC seeding in several opportunities at times and places and explained the efficiency of LC seeding.

Tenki, Vol. 63, No. 6

(Tenki is the bulletin journal of the Meteorological Society of Japan in Japanese.)

TENKI, Vol. 63, No. 6, pp. 469-476, 2016

Long-term Variations in Cold Mortality and Winter Temperature in Japan

By
Fumiaki FUJIBE*

* Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, 192-0397, Japan.
E-mail: ffujibe.bs@gmail.com

(Received 8 December 2015; Accepted 22 February 2016)

Abstract

Variations in cold mortality in Japan were examined in relation to winter temperature, using vital statistics data for 1909 to 2014. Deaths due to excessive cold were found to have increased since the late 1990s, and exceeded a thousand in each year from 2010. This increase is due to increases in the population and cold mortality rate of elderly people, although cold mortality of people in young and middle ages has decreased. A regression analysis for 1995 to 2014 has revealed that cold mortality changes by about -10% for a 1¡C increment in wintertime temperature defined by the average for January and February. This dependence is weaker than that of heat mortality on summertime temperature, implying a smaller contribution of climatic factors to cold mortality than to heat mortality.