HR: 0800h
AN: GC21A-0157 [Abstracts]
TI: Change in climate and nature over Toyama prefecture due to global warming
AU: * Hatsushika, H
EM: hiroaki.hatsushika@eco.pref.toyama.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Kawasaki, K
EM: kiyoto.kawasaki@pref.toyama.lg.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Oritani, T
EM: teiichi.oritani@eco.pref.toyama.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Kondo, T
EM: takayuki.kondo@eco.pref.toyama.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Mizoguchi, T
EM: toshiaki.mizoguchi@eco.pref.toyama.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Kido, M
EM: mizuka.kido@eco.pref.toyama.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Tsuchihara, Y
EM: yoshiyuki.tsuchihara@eco.pref.toyama.jp
AF: Toyama Prefectural Environmental Science Research Center, 17-1 Naka-Taikoyama,
Imizu, 939-0363, Japan
AU: Wada, N
EM: wada@sci.u-toyama.ac.jp
AF: University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan
AU: Horikawa, K
EM: kaz.horikawa@met.kishou.go.jp
AF: Toyama Local Meteorological Observatory/JMA, 2415 Ishizaka, Toyama, 930-0892, Japan
AB:
Toyama prefecture is located in the center of the mainland of Japan and is surrounded by steep mountains called
Tateyama at about 3,000m above sea level and by the deep Toyama bay at about 1,000m depth. In summer,
since Pacific high covers mainland of Japan and East Asian summer monsoon brings a lot of rainfalls, climate in
Toyama is suitable for cropping the highest qualified rice and vegetables. In winter, the dominant East Asian
winter monsoon brings water from the Japan Sea by heavy snowfalls onto Tateyama. As the snow melts
gradually from spring to early autumn, the abundant pure water is utilized for generating hydroelectric power and
for a variety of other purposes, making it a vital resource for industries, agriculture, fishery, and human life as well
as for wildlife on both sides of the plains and the mountains of Toyama.
In recent, by the IPCC-AR4, influence of global warming is reported in many aspects of nature and human lives all
over the world. However, we have yet to realize whether these signs are also appeared in Toyama.
Therefore, we carried out statistical analyses to investigate change of nature, climate, and human lives in Toyama
by global warming.
Some of main results are as follows.
Using the phenological data of a sample maple (Acer palmatum) tree growing at the garden in Toyama Local
Meteorological Observatory, we analyzed that the leaf-color-change date is delayed ca. 20 days and the leaf-falling
date is delayed ca. 10 days during recent 30 years.
Using daily snowfall data between 1958 and 2007, we found that snow amounts and snowfall days are
decreased significantly on the plains, while there is no trend on the mountain side.
Using AMeDAS's hourly temperature data between 1978 and 2006, we detected increases in winter time
minimum temperature, summer time maximum temperature, and "typical summer days" which is defined as total
days that the daily maximum temperature exceeds 30 degree C.
It can be inferred from these findings that the climate change over Toyama is occurring with no doubt, and it is
necessary for us to make plans for adapting to the future change. Now, we are conducting future climate
simulations of Toyama by downscaling some SRES scenario data. We will show some preliminary results of the
simulation at the meeting.
DE: 1637 Regional climate change
DE: 1863 Snow and ice (0736, 0738, 0776, 1827)
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
DE: 3309 Climatology (1616, 1620, 3305, 4215, 8408)
SC: Global Environmental Change [GC]
MN: 2007 Fall Meeting