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Title: 降雨-蒸発過程における長期観測情報の面代表性に関する一考察
Other Titles: Study on spatial representation of long-term observation in rainfall-evaporation process
Authors: 中北, 英一  KAKEN_name
長澤, 光弥  KAKEN_name
池淵, 周一  KAKEN_name
Author's alias: NAKAKITA, Eiichi
Keywords: 降水・蒸発過程
rainfall-evaporation process
spacial representation
spatio-temporal characteristics
information of point observaion
Issue Date: 1-Apr-2000
Publisher: 京都大学防災研究所
Journal title: 京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B
Volume: 43
Issue: B-2
Start page: 137
End page: 152
Abstract: 広域を代表する潜熱フラックス推定へ向けての試みの一つとして, 降水-蒸発過程における長期的な地点観測情報を空間的な代表性をもつ情報へと変換するための基礎的な検討を行う。手法としては, 降水現象を確率過程であるとしてとらえ, その確率構造を保存するように降水の時間・空間分布をシミュレートし, 陸面過程モデルを介することにより, 蒸発量の時間・空間分布に変換し, 降水と蒸発量の時間・空間的な特性を比較, 考察する。
As a trial for estimation of latent heat flux which represents large area, this study is carried on aiming at the relation between spatio-temporal features of latent heat flux and rainfall because rainfall correlation structure is well-known due to the development of the study on radar information etc.The proposed procedure is as followed: first, spatio-temporal distribution of rainfall is generated keeping its correlation structure as much as possible. Next, the generated rainfall distribution is transformed into spatio-temporal of evaporation by applying a land-surface model for each grid cell. Finally, the difference of spatio-temporal characteristics between rainfall and evaporation is examined using powerspectrum.
Appears in Collections:No.43 B-2

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