Canopy rainfall interception and fog capture by pinus pumila regal at Mt. Tateyama in the Northern Japan Alps, Japan

Yoshitoshi Uehara, Atsushi Kume

研究成果: Contribution to journalArticle査読

13 被引用数 (Scopus)

抄録

The importance of fog precipitation in the alpine hydrological processes of Pinus pumila canopy was evaluated on Mt. Tateyama, central Japan. We observed rain and fog precipitation, throughfall, and wind direction and velocity at Jodo-daira (36.566°N, 137.606°E, 2840 m a.s.l.) for 3 years. During the snow-free period (August and September), mean monthly rain and fog precipitation was 0.45 mm h -1 and 0.14 mm h -1, respectively. The mean rainfall interception by P. pumila canopy was about 48%, which is higher than that of other forest canopies at lower altitudes. During rainfall, the dense canopy intercepts rain and the water evaporates from the needle surfaces. On the other hand, the canopy captured fog precipitation even in the absence of rainfall. The amount of throughfall increased with increasing fog deposition. Using δ 18O and δD analysis, the mean contribution of fog water to the throughfall was estimated at approximately 35%, consistent with the result from direct measurement. These results indicate that P. pumila should have a significant influence on the local hydrological processes of the high mountain ecosystem. The large contribution of fog precipitation can be attributed to the high wind velocity and humidity of the Japan Alps.

本文言語英語
ページ(範囲)143-150
ページ数8
ジャーナルArctic, Antarctic, and Alpine Research
44
1
DOI
出版ステータス出版済み - 2 1 2012

All Science Journal Classification (ASJC) codes

  • 地球変動および惑星変動
  • 生態、進化、行動および分類学
  • 地表過程

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