新潟県とその周辺における降積雪量の1927~2005年の · pdf...
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IPCC, 2001Climate change 2001The scientific
basis,Contribution of Working Group I to the third
Assessment Report of the Intergovernmental Panel
on Climate ChangeHoughton,J.T.et al.eds..
Cambridge University Press,881pp.
1979
4137-45
197650247pp
200120116
pp
Nakamura, T. and M. Shimizu, 1996Variation of
snow,winter precipitation and winter air tempera-
ture during the last century at Nagaoka, Japan,
Journal of Glaciology,42,136-140.
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Long-term Changes in Snowfall Depth and Snowcover Depth
in and around Niigata Prefecture from 1927 to 2005Analysis Using Data Observed at Railway Stations
Hiroto SUZUKI
Research and Development Center of JR East Group,East Japan Railway Company,
2-0 Nisshin-cho,Kita-ku,Saitama,Saitama 331-8513,Japan.
(Received 14 June 2005Accepted 19 January 2006)
Abstract
The objective of this study is to clarify the long-term changes in snowfall depth and snowcover depth
and the dependences of snowfall depth and snowcover depth on temperature and precipitation in Niigata,
Yamagata,and Fukushima prefecture, and these were analyzed by using data observed at 14 railway
stations from 1927 to 2005.
Annual snowfall depth,annual maximum snowcover depth,and annual maximum daily snowfall depth
have a decreasing trend from 1927 to 2005.These also have decadal cyclic variations,and there were high
before the middle 1940s,low from the late 1940s to the 1950s,high from the 1960s to the middle 1980
s,and low after the late 1980s.
Annual snowfall depth and annual maximum snowcover depth show negative correlation with the winter
from December to Februarymean temperature at all stations.Furthermore,in case of the winter mean
temperature rising,the higher the winter mean temperature of the site,the larger the decreasing rates of
annual snowfall depth and annual maximum snowcover depth become.Annual snowfall depth and annual
maximum snowcover depth show positive correlation with the winter precipitation at most of the stations.
Furthermore,in case of the winter precipitation increasing,the lower the winter mean temperature of the
site,the larger the increase of annual snowfall depth and annual maximum snowcover depth become.
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