2024-03-28T08:31:41Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00011770
2022-12-14T04:11:44Z
1169:1170
中部山岳地域における降水のd-excess の時空間変動
脇山, 義史
牧野, 裕紀
山中, 勤
鈴木, 啓助
d-excess
降水
precipitation
水の安定同位体
stable isotope of water
中部山岳地域
apanese Alps region
Deuterium excess (d-excess), as well as δ18O and δD, can offer an opportunity to understand hydrological cycles. However, there have been few investigations on d-excess of precipitation within a broad area observation network, including high-latitude areas. This study presents spatiotemporal variations in d-excess of precipitation observed in the Japanese Alps region. Precipitation samples, collected monthly at 14 locations across the Japanese Alps region from July 2010 to June 2011, were sampled for isotopic analyses. Annual precipitation amount weighted mean values of d-excess ranged from 11.0 to 14.7‰, and a correlation with altitude was found. No correlation with longitude and latitude was observed. Monthly variations in d-excess indicated a tendency toward higher d-excess values during the winter months at all sampling points. Spatial distribution of d-excess in each month showed significant correlations of d-excess with altitude in summer months. In winter months, relatively high values of d-excess were observed in precipitation caused under winter-type synoptic pressure patterns. Thus, spatiotemporal variations in d-excess of precipitation over the Japanese Alps region can be characterized by the correlation with altitude in summer months and the influence of synoptic conditions on its spatial distribution in winter months.
Article
地学雑誌. 122(4):666-681 (2013)
journal article
東京地学協会
2013
application/pdf
地学雑誌
4
122
666
681
0022-135X
AN00322536
https://soar-ir.repo.nii.ac.jp/record/11770/files/Chigaku_Zasshi_122_4_666.pdf
jpn
10.5026/jgeography.122.666
https://doi.org/10.5026/jgeography.122.666