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2005 Fiscal Year Final Research Report Summary

Integrated assessment of global warming influence of ecosystems based on ecosystem global warming potential

Research Project

Project/Area Number 15310004
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionUniversity of Tsukuba

Principal Investigator

MARIKO Shigeru  University of Tsukuba, Life and Environmental Sciences, Associate Professor, 大学院・生命環境科学研究科, 助教授 (10251018)

Co-Investigator(Kenkyū-buntansha) KOIZUMI Hiroshi  Gifu University, River Basin Research Center, Professor, 流域圏科学研究センター, 教授 (50303516)
TODA Hideshige  Shinshu University, Faculty of Science, Professor, 理学部, 教授 (60291382)
SEKIKAWA Seikoh  Tamagawa University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (40226642)
SUGITA Mikio  Yamanashi Institute of Environmental Sciences, Division of Regional Environmental Sciences, Researcher, 地域環境政策研究部, 研究員 (60342961)
Project Period (FY) 2003 – 2005
KeywordsCarbon dioxide / Gas flux / GIS / Global warming / Ecosystem / Methane / Nitrogen monoxide / Global warming potential
Research Abstract

Our aim is to assess the influence of ecosystems on global warming based on the budgets of three greenhouse-effect gases (CO_2,CH_4,N_2O) between the atmosphere and ecosystems. The data of the gas fluxes were obtained from in situ measurements by some chamber methods and survey of previous papers. Here, gas influx to the ecosystem has a positive unit, and gas efflux from the ecosystem a negative unit. Based on global warming potential (GWP,IPCC 1996), the fluxes of CH_4 and N_2O were converted into an equivalent of CO_2. The sum of CO_2 flux and CO_2-equivalent fluxes of CH_4 and N_2O is defined as ecosystem global warming potential (EGWP).
1.EGWPs in various types of ecosystems
Studied ecosystems (forest, grassland, wetlands, agroecosystems including croplands, rice paddy fields, orchards) were a sink for CO_2, a sink for CH_4 except wetlands, N2O and a weak source for N_2O. The strongest source of N_2O was croplands which were supplied with chemical fertilizer. The calculated EGWPs were positive in all the ecosystems, and the magnitude differed between ecosystems. Forests showed the highest EGWP, and wetlands the lowest EGWP. In agroecosystems, EGWP assessment revealed that croplands were wrong, rice paddy fields neutral, and orchards excellent.
2.Case study of global warming influence on a regional scale based on EGWP
Land use in Yamanashi Prefecture was mapped with a GIS technique. The map was overlaid with an EGWP distribution map. The analysis of the EGWP map suggests that EGWP assessment method developed by this study is available for planning future management of ecosystems.
The obtained results will be published as some original papers.

  • Research Products

    (12 results)

All 2005 Other

All Journal Article (11 results) Book (1 results)

  • [Journal Article] The potential importance of grazing to the fluxes of carbon dioxide and methane in an alpine wetland on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Hirota, M., Mariko, S.
    • Journal Title

      Atmospheric Environment 39

      Pages: 5255-5239

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Seasonal and annual variations in soil respiration in a cool-temperate deciduous broad-leaved forest, Japan.2005

    • Author(s)
      Mo, W., Mariko, S., Koizumi, H.
    • Journal Title

      Agricultural and Forest Meteorology 134

      Pages: 81-94

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Interannual variation in CO_2 Effluxes from Soil and Surfaces in a Cool-Temperate deciduous broad-leaved forest.2005

    • Author(s)
      Mo, W., Mariko, S., Koizumi, H.
    • Journal Title

      Phyton 45

      Pages: 99-107

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Interannual variation in CO_2 Effluxes from Soil and Snow Surfaces in a Cool-Temperate deciduous broad-leaved forest.2005

    • Author(s)
      Mo, W, Mariko, S., Koizumi, H.
    • Journal Title

      Phyton 45

      Pages: 99-107

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Carbon Dioxide Dynamics and Controls in a Deep-water Wetland.

    • Author(s)
      Hirota, M., Mariko, S.
    • Journal Title

      Ecosystems (in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of irrigation on CO_2 and CH_4 fluxes from a Mongolian steppe soil.

    • Author(s)
      Mariko, S.
    • Journal Title

      Journal of Hydrology, Special Issue (in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Emission of nitrous oxide through a snowpack in ten types of temperate ecosystems in Japan.

    • Author(s)
      Yashiro, Y., Mariko, S., Koizumi, H.
    • Journal Title

      Ecological Research (in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Carbon Dioxide Dynamics and Controls in a Deep-water Wetland.

    • Author(s)
      Hirota, M., Mariko, S.
    • Journal Title

      Ecosystems (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of irrigation on CO_2 and CH_4 fluxes from a Mongolian steppe soil.

    • Author(s)
      Mariko, S.
    • Journal Title

      Journal of Hydrology Special Issue(in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Emission of nitrous oxide through a snowpack in ten types of temperate ecosystems in Japan.

    • Author(s)
      Yashiro, Y., Mariko, S., Koizumi, H.
    • Journal Title

      Ecological Research (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] PSeasonal variation in CH_4 uptake and CO_2 emission in a Japanese temperate deciduous forest soil.

    • Author(s)
      Oe, Y, Mariko, S.
    • Journal Title

      Global Climate Change and Response of Carbon Cycle in the Equatorial Pacific and Indian Oceans and Adjacent Landmasses (eds.H.Kawahata et al.)(Elsevier) (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Seasonal variation in CH_4 uptake and CO_2 emission in a Japanese temperate deciduous forest soil. In : Global Climate Change and Response of Carbon Cycle in the Equatorial Pacific and Indian Oceans and Adjacent Landmasses (eds. H. Kawahata et al.)

    • Author(s)
      Oe, Y., Mariko, S.
    • Publisher
      Elsevier(in press)
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2007-12-13  

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