紀要論文 〈Original Papers〉Diurnal and seasonal variation of air temperature profile in the mountain forest at Sugadaira, central Japan

UENO, Kenichi  ,  UEDA, Seiya  ,  KANAI, Ryuji  ,  MASAKI, Daisuke  ,  SATO, Miyuki  ,  RIN, Son  ,  HIROTA, Mitsuru

13pp.1 - 12 , 2017-12-22 , University of Tsukuba, Doctoral Program in Geoenvironmental Sciences, Graduate School of Life and Environmental Sciences
ISSN:1880-6252
NII書誌ID(NCID):AA12119094
内容記述
Air temperature profiles were observed for a year with micro-climate observation in and around the mixed mountain forest. The shading effects of tree crown, depending on the solar elevation angle and abscission of broad leaf species, controlled the diurnal and seasonal variation of radiation budget and temperature gradients in the forest. Vertical mixing of air in the forest was infrequent even the wind speed over the forest was high. Sasa albo-marginata served as another important daytime heat source at the forest floor in snow-free season. In the forest, weak but clear diurnal wind variation was observed on fair summer days indicating prevailing of daytime up-slope winds and nocturnal gravity currents. After leaf abscission, the nocturnal temperature inversion prevailed in and out of the forest. The importance of the local winds blowing through the forest and their effect on the data from the station in an open space are discussed with regard to the long-term assessment of mountain meteorological and forest phonological data.
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