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  1. B300 農学部/生命農学研究科
  2. B300a 雑誌掲載論文
  3. 学術雑誌

Seasonal variation in the energy and water exchanges above and below a larch forest in eastern Siberia

http://hdl.handle.net/2237/7756
http://hdl.handle.net/2237/7756
3e814cdb-b2d8-4a1c-9ee9-e0b681795f65
名前 / ファイル ライセンス アクション
HP_Ohta_2001_final.pdf HP_Ohta_2001_final.pdf (590.6 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2007-05-02
タイトル
タイトル Seasonal variation in the energy and water exchanges above and below a larch forest in eastern Siberia
言語 en
著者 Ohta, Takeshi

× Ohta, Takeshi

WEKO 16475

en Ohta, Takeshi

Search repository
Hiyama, Tetsuya

× Hiyama, Tetsuya

WEKO 16476

en Hiyama, Tetsuya

Search repository
Tanaka, Hiroki

× Tanaka, Hiroki

WEKO 16477

en Tanaka, Hiroki

Search repository
Kuwada, Takeshi

× Kuwada, Takeshi

WEKO 16478

en Kuwada, Takeshi

Search repository
Maximov, Trofim C.

× Maximov, Trofim C.

WEKO 16479

en Maximov, Trofim C.

Search repository
Ohata, Tetsuo

× Ohata, Tetsuo

WEKO 16480

en Ohata, Tetsuo

Search repository
Fukushima, Yoshihiro

× Fukushima, Yoshihiro

WEKO 16481

en Fukushima, Yoshihiro

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 This is a preprint of an article published in Hydrological Processesnclude v.15, n.8, 2001, p.1459-1476 (C)Copyright 2001
キーワード
主題Scheme Other
主題 Siberian larch forest
キーワード
主題Scheme Other
主題 Energy and water balance
キーワード
主題Scheme Other
主題 Canopy resistance
キーワード
主題Scheme Other
主題 Land surface condition
キーワード
主題Scheme Other
主題 GAME-Siberia
抄録
内容記述 The water and energy exchanges in forests form one of the most important hydro-meteorological systems. There have been far fewer investigations of the water and heat exchange in high latitude forests than of those in warm, humid regions. There have been few observations of this system in Siberia for an entire growing season, including the snowmelt and leaf fall seasons. In this study, the characteristics of the energy and water budgets in an eastern Siberian larch forest were investigated from the snowmelt season to the leaf fall season. The latent heat flux was strongly affected by the transpiration activity of the larch trees and increased quickly as the larch stand began to foliate. The sensible heat dropped at that time, although the net all-wave radiation increased. Consequently, the seasonal variation in the Bowen ratio was clearly “U”-shaped, and the minimum value (1.0) occurred in June and July. The Bowen ratio was very high (10 - 25) in early spring, just before leaf opening. The canopy resistance for a big leaf model far exceeded the aerodynamic resistance and fluctuated over a much wider range. The canopy resistance was strongly restricted by the saturation deficit, and its minimum value was 100 sec m^-1 (10 mm sec^-1 in conductance). This minimum canopy resistance is higher than values obtained for forests in warm, humid regions, but is similar to those measured in other boreal conifer forests. It has been suggested that the senescence of leaves also affects the canopy resistance, which was higher in the leaf fall season than in the foliated season. The mean evapotranspiration rate from 21 April 1998 to 7 September 1998 was 1.16 mm day^-1, and the maximum rate, 2.9 mm day^-1, occurred at the beginning of July. For the growing season from 1 June - 31 August, this rate was 1.5 mm day^-1. The total evapotranspiration from the forest (151 mm) exceeded the amount of precipitation (106 mm) and was equal to 73% of the total water input (211 mm), including the snow water equivalent. The understory evapotranspiration reached 35% of the total evapotranspiration, and the interception evaporation was 15% of the gross precipitation. The understory evapotranspiration was high and the interception evaporation was low because the canopy was sparse and the LAI was low.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 Wiley
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
ISSN
収録物識別子タイプ PISSN
収録物識別子 08856087
書誌情報 en : Hydrological Processes

巻 15, 号 8, p. 1459-1476, 発行日 2001-06-15
フォーマット
application/pdf
著者版フラグ
値 author
URI
識別子 http://hdl.handle.net/2237/7756
識別子タイプ HDL
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