Title Recent fluctuations of meteorological and snow conditions in Japanese mountains
Author Yamaguchi, S.; Abe, O.; Nakai, S.; Sato, A.
Author Affil Yamaguchi, S., National Research Institue for Earth Science and Disaster Prevention, Snow and Ice Research Center, Nagaoka, Japan
Source Annals of Glaciology, 52(58), p.209- 215, . Publisher: International Glaciological Society, Cambridge, United Kingdom. ISSN: 0260-3055
Publication Date 2011
Notes In English. 15 refs. GeoRef Acc. No: 310190
Index Terms precipitation (meteorology); climatic change; meteorology; snow; snow water equivalent; temperature; Japan--Honshu; Asia; atmospheric precipitation; climate change; depth; Far East; Honshu; Japan; monitoring; mountains; seasonal variations; water resources
Abstract Meteorological data from mountainous areas of Japan have been collected by the National Research Institute for Earth Science and Disaster Prevention (NIED) for almost 20 years. The collected long-period data indicate that neither a notable increase in mean winter temperature nor a reduction in snow depth has occurred in these areas. The maximum snow depth, SDmax, and maximum snow water equivalent, SWEmax, show similar fluctuation trends, although with large year- to-year variations in value and a larger fluctuation range for SWEmax than for SDmax. This result suggests that monitoring of only SDmax in mountainous areas is not sufficient for understanding the quantitative fluctuation of water resources originating from snow. The SDmax fluctuation trends in mountainous areas sometimes differ from those in flatland areas because mountain SDmax depends more on winter precipitation than on mean winter air temperature, whereas the opposite is true for flatlands. In addition, the dependence ratio of SDmax on fluctuations in winter precipitation changes with altitude because the distributions of precipitation with air temperature change with altitude.
Publication Type journal article
Record ID 65007373