Probable effects of CO2-induced climatic warming on the thermal environment of ponded shallow water

Shunji Ohta, Zenbei Uchijima, Hiroshi Seino, Yasuyuki Oshima

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    A physical model was developed for describing the thermal environment of ponded shallow water as a model for rice fields in relation to climatic conditions. The model was used to assess probable effects of CO2-induced warming on the thermal conditions of ponded shallow water. It was assumed that an altered equilibrium climate was produced by atmospheric CO2 which was twice that of present levels. The 1951-80 climatic means of Japan were used as baseline data. Water temperature and energy balance characteristics predicted from the model were compared between both climates. The most notable results were that water temperature under CO2 doubling rose 2 to 4 °C. These increases in temperature would induce a remarkable northward shift of the 15 °C isotherm which characterizes the isochrone of safe transplanting dates for rice seedlings. CO2-warming would have a considerable influence on the energy balance characteristics, intensifying the evaporation rate from the water surface. Changes in thermal conditions of rice fields due to CO2-induced climatic warming are, therefore, expected to bring about significant effects on aquatic environments and the life forms they support.

    Original languageEnglish
    Pages (from-to)69-90
    Number of pages22
    JournalClimatic Change
    Volume23
    Issue number1
    DOIs
    Publication statusPublished - 1993 Jan

    Fingerprint

    shallow water
    warming
    Water
    paddy field
    energy balance
    Energy balance
    water temperature
    climate
    aquatic environment
    isotherm
    rice
    evaporation
    Temperature
    seedling
    Isotherms
    surface water
    Evaporation
    effect
    Hot Temperature
    temperature

    ASJC Scopus subject areas

    • Global and Planetary Change
    • Environmental Chemistry
    • Environmental Science(all)
    • Atmospheric Science

    Cite this

    Probable effects of CO2-induced climatic warming on the thermal environment of ponded shallow water. / Ohta, Shunji; Uchijima, Zenbei; Seino, Hiroshi; Oshima, Yasuyuki.

    In: Climatic Change, Vol. 23, No. 1, 01.1993, p. 69-90.

    Research output: Contribution to journalArticle

    Ohta, Shunji ; Uchijima, Zenbei ; Seino, Hiroshi ; Oshima, Yasuyuki. / Probable effects of CO2-induced climatic warming on the thermal environment of ponded shallow water. In: Climatic Change. 1993 ; Vol. 23, No. 1. pp. 69-90.
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    abstract = "A physical model was developed for describing the thermal environment of ponded shallow water as a model for rice fields in relation to climatic conditions. The model was used to assess probable effects of CO2-induced warming on the thermal conditions of ponded shallow water. It was assumed that an altered equilibrium climate was produced by atmospheric CO2 which was twice that of present levels. The 1951-80 climatic means of Japan were used as baseline data. Water temperature and energy balance characteristics predicted from the model were compared between both climates. The most notable results were that water temperature under CO2 doubling rose 2 to 4 °C. These increases in temperature would induce a remarkable northward shift of the 15 °C isotherm which characterizes the isochrone of safe transplanting dates for rice seedlings. CO2-warming would have a considerable influence on the energy balance characteristics, intensifying the evaporation rate from the water surface. Changes in thermal conditions of rice fields due to CO2-induced climatic warming are, therefore, expected to bring about significant effects on aquatic environments and the life forms they support.",
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