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Energy and water cycles in Siberian biosphere

Research Project

Project/Area Number 11201206
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (B)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionNagoya University

Principal Investigator

OHTA Takeshi (2001-2002)  Nagoya University, Graduate school of Bioagricultural Sciences, Professor, 大学院・生命農学研究科, 教授 (20152142)

福嶌 義宏 (1999-2000)  名古屋大学, 大気水圏科学研究所, 教授 (00026402)

Co-Investigator(Kenkyū-buntansha) FUKUSHIMA Yoshihiro  Research Institute for Humanity and Nature, Professor, 総合地球環境学研究所, 教授 (00026402)
HIYAMA Tetsuya  HyARC Nagoya University, Associate Professor, 地球水環境研究センター, 助教授 (30283451)
NAKAWO Masayoshi  Research Institute for Humanity and Nature, Professor, 総合地球環境学研究所, 教授 (90142695)
KUBOTA Jumpei  Faculty of Agriculture, Tokyo University of Agriculture and Technology, Associate Professor, 農学部, 助教授 (90195503)
YOSHIKAWA Ken  Faculty of Agriculture, Okayama University, Professor, 農学部, 教授 (50166922)
太田 岳史  岩手大学, 農学部, 助教授 (20152142)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥58,900,000 (Direct Cost: ¥58,900,000)
Fiscal Year 2001: ¥8,600,000 (Direct Cost: ¥8,600,000)
Fiscal Year 2000: ¥20,700,000 (Direct Cost: ¥20,700,000)
Fiscal Year 1999: ¥29,600,000 (Direct Cost: ¥29,600,000)
KeywordsSiberia / Water and energy cycles / Different forest types / Permafrost / Climatic condition / 年々変動 / 東シベリア / タイガ林 / カラマツ林 / アカマツ林 / 草地 / 樹液流速 / 熱・水フラックス / 二酸化炭素フラックス / 接地境界層観測 / 蒸散量 / 植物生理生態 / 寒冷域生物圏水循環モデル
Research Abstract

1. The sum of the turbulent fluxes was generally in good agreement with the available energy flux, except when the latent heat flux was large, when the total turbulent fluxes often exceeded the available energy flux ; this bias in the energy balance was affected by the wind direction. Although the reasons for this phenomenon at this site are not clear, it might be an effect of the larch forest surrounding the site.
2. The seasonal variation and magnitude of the latent heat flux (IE) were similar to those of the sensible heat flux (H) ; both were maximal in June, Consequently, the Bowen ratio was around 1.0 on many days during the study period. On some clear days just after rainfall events, IE was very large, and the sum of H and IE exceeded the net all-wave radiation.
3. Remarkably, from 7 to 22 July 2000, which corresponded to a long rainless period, IE decreased and was smaller than H. Considering the diurnal change in the saturation deficit and soil moisture for the same period, it is thought that IE was affected by the atmosphere rather than by the soil.
4. The contribution of understory evapotranspiration (Eu) to the evapotranspiration from the entire ecosystem (Et) was 25-50% of Et throughout the period analyzed, and a similar relationship was obtained for overstory transpiration (Eo). These results suggest that Eu plays a very important role in the water cycle at this site.
5. Significant differences in the water and energy exchanges of the pine and larch forests at Spasskaya Pad occurred just after the snowmelt season. This could have been due to the difference in species (evergreen versus deciduous forest) or in soil thawing conditions. Consequently, the shape of the seasonal variation in the Bowen ratio over the course of the study period at the pine site was markedly different from that in the larch forest.

Report

(4 results)
  • 2002 Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Hamada, S., Ohta, T.et al.: "Hydrometrorologial behaviors of a pine forest and comparison with a larch Forest in eastern Siberia Forest in eastern Siberia"HYDROLOGICAL PROCESSES. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsui, K., Ohta, T.: "Estimating the snow distribution in a subalpine region using a Distributed snowmelt model"IAHS Publication. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hiyama, T., Strunin, M.A.et al.: "Aircraft observations of the atmospheric boundary layer over a heterogeneous surface in Eastern Siberia boundary layer over a heterogeneous surface in Eastern Siberia"HYDROLOGICAL PROCESSES. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 田中広樹, 太田岳史, Maximov, T.C., 檜山哲哉: "東シベリア・カラマツ林における移流項を考慮したエネルギー交換速度の再評価"水文・水資源学会誌. 15. 615-624 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 鳥羽 妙, 太田岳史: "森林樹冠構造の相違による遮断蒸発特性の変動とそのモデル化"水文・水資源学会誌. 15. 345-361 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hamada. S., Ohta. T. et al.: "Hydrometrorologial behaviors of a pine forest and comparison with a larch Forest in eastern Siberia Forest in eastern Siberia"HYDROLOGICAL PROCESSES. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Matsui,K., Ohta, T.: "Estimating the snow distribution in a subalpine region using a Distributed snowmelt model"IAHS Publication. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hiyama,T., Strunin, M.A. et al: "Aircraft observations of the atmospheric boundary layer over a heterogeneous surface in Eastern Siberia boundary layer over a heterogeneous surface in Eastern Siberia"HYDROLOGICAL PROCESSES. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tanaka, H., Ohta, T. et al.: "Re-evaluation of the energy exchanges rate including the advection in a larch forest in eastern Siberia"J. Japan Soc. Hydrol. & Water Resour. 15. 615-624 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Toba, T., Ohta, T.: "Modeling the characteristics of interception loss in forests"J. Japan Soc. Hydrol. & Water Resour. 15. 345-361 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ohta, T., T.Hiyama et al.: "Seasonal variation in the energy and water exchanges above and below a larch forest in Eastern Siberia"HYDROLOGICAL PROCESSES. 15. 1459-1476 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hiyama, T., M.A.Strunin: "Flux distributions of heat and carbon dioxide in the atmospheric boundary layer over non-homogeneous surface in Eastern Siberia"Proceedings of the Fifth International Study Conference on GEWEX in Asia and GAME. 307-314 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hashimoto, T., M.Nomura, T.Ohta et al.: "Comparison of heat balance on the snow surface among the tree forest sites and alas site over the eastern plain taiga"Proceedings of GAME-Siberia Workshop. 19-20 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 桑田 孝, 酒井克人, 竹内真一, Maximov, T.C., 吉川 賢: "東シベリアヤクーツク周辺における北方林の林分構造"日本緑化工学会誌. 27・1. 125-130 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Kimoto, Edahiro, H., Kubota, J., Suzuki, K.: "Observation of energy balance and CO2 flux in mountain taiga"Proceedings of GAME-Siberia Workshop. 127-128 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yoshikawa,K.,Kuwada,T.and Takeuchi,S.: "Forest structure and transpiration activity of boreal forests in eastern Siberia"Research Report of IHAS. No.7. 56-59 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kubota,J.: "Large-scale hydrological characteristics of Siberian basins"Research Report of IHAS. No.7. 85-86 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hiyama,T.: "Effects of land surface patches to the distribution of surface fluxes and those aggregation processes"Research Report of IHAS. No.7. 148-153 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 田中広樹,太田岳史,檜山哲哉,Maximov,T.C.: "北方落葉樹林における光合成・蒸散特性の季節変化-樹冠単層モデルを用いた解析-"日本林学会誌. 82. 259-267 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ohta,T.,Hiyama,T.,Tanaka,H.,Kuwada,T.,Maximov,T.C.,Ohata,T.and Fukushima,Y.: "Seasonal variation in the energy and water exchanges above and below a larch forest in eastern Siberia"Hydrological processes. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hiyama, T., M. Sugita, H. Bergstrom and M. Molder: "Wind speed measurements in upper and lower boundary layer to determine regional momentum fluxes"Agricultural and Forest Meteorology. 98-99巻. 145-158 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ma, X., Y. Fukushima, T. Hashimoto, T. Hiyama and T. Nakashima: "Application of a simple SVAT model in a mountain catchment under temperate humid climate"J. Japan. Soc. Hydrol & Water Resour.. 12巻4号. 285-294 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ma, X., Y. Fukushima, T. Hiyama T. Hashimoto, and T. Ohata: "A macro-scale hydrological analysis of the Lena River basin"Hydrological Processes. 14巻3号. 639-651 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ohta, T., K. Suzuki, Y. Kodama, J. Kobota, Y. Kominami and Y. Nakai: "Characteristics of the heat balance above the canopies of evergreen and deciduous forests during the snowy season"Hydrological Processes. 13巻14-15号. 2383-2394 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 檜山哲哉: "湿度(牛山素行編「身近な気象・気候調査の基礎」)"古今書院. 45-67 (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2018-03-28  

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