Siberian CO2 efflux in winter as a CO2 source and cause of seasonality in atmospheric CO2

S. A. Zimov, S. P. Davidov, Y. V. Voropaev, S. F. Prosiannikov, I. P. Semiletov, M. C. Chapin, F. S. Chapin

    Результат исследований: Материалы для журналаСтатья

    155 Цитирования (Scopus)

    Выдержка

    Over three years, we found a consistent CO2 efflux from forest tundra of the Russian North throughout the year, including a large (89 g C m2 yr1) efflux during winter. Our results provide one explanation for the observations that the highest atmospheric CO2 concentration and greatest seasonal amplitude occur at high latitudes rather than over the mid- latitudes, where fossil fuel sources are large, and where high summer productivity offset by winter respiration should give large seasonal oscillations in atmospheric CO2. Winter respiration probably contributed substantially to the boreal winter CO2 efflux. Respiration is an exothermic process that produces enough heat to warm soils and promote further decomposition. We suggest that, as a result of this positive feedback, small changes in surface heat flux, associated with human activities in the North or with regional or global warming, could release large quantities of organic carbon that are presently stored in permafrost.

    Язык оригиналаАнглийский
    Страницы (с-по)111-120
    Число страниц10
    ЖурналClimatic Change
    Том33
    Номер выпуска1
    DOI
    СостояниеОпубликовано - 1996

    Отпечаток

    seasonality
    respiration
    winter
    tundra
    permafrost
    fossil fuel
    heat flux
    global warming
    human activity
    organic carbon
    oscillation
    decomposition
    productivity
    summer
    soil

    ASJC Scopus subject areas

    • Global and Planetary Change
    • Atmospheric Science

    Цитировать

    Zimov, S. A., Davidov, S. P., Voropaev, Y. V., Prosiannikov, S. F., Semiletov, I. P., Chapin, M. C., & Chapin, F. S. (1996). Siberian CO2 efflux in winter as a CO2 source and cause of seasonality in atmospheric CO2. Climatic Change, 33(1), 111-120. https://doi.org/10.1007/BF00140516

    Siberian CO2 efflux in winter as a CO2 source and cause of seasonality in atmospheric CO2. / Zimov, S. A.; Davidov, S. P.; Voropaev, Y. V.; Prosiannikov, S. F.; Semiletov, I. P.; Chapin, M. C.; Chapin, F. S.

    В: Climatic Change, Том 33, № 1, 1996, стр. 111-120.

    Результат исследований: Материалы для журналаСтатья

    Zimov, SA, Davidov, SP, Voropaev, YV, Prosiannikov, SF, Semiletov, IP, Chapin, MC & Chapin, FS 1996, 'Siberian CO2 efflux in winter as a CO2 source and cause of seasonality in atmospheric CO2', Climatic Change, том. 33, № 1, стр. 111-120. https://doi.org/10.1007/BF00140516
    Zimov, S. A. ; Davidov, S. P. ; Voropaev, Y. V. ; Prosiannikov, S. F. ; Semiletov, I. P. ; Chapin, M. C. ; Chapin, F. S. / Siberian CO2 efflux in winter as a CO2 source and cause of seasonality in atmospheric CO2. В: Climatic Change. 1996 ; Том 33, № 1. стр. 111-120.
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    abstract = "Over three years, we found a consistent CO2 efflux from forest tundra of the Russian North throughout the year, including a large (89 g C m2 yr1) efflux during winter. Our results provide one explanation for the observations that the highest atmospheric CO2 concentration and greatest seasonal amplitude occur at high latitudes rather than over the mid- latitudes, where fossil fuel sources are large, and where high summer productivity offset by winter respiration should give large seasonal oscillations in atmospheric CO2. Winter respiration probably contributed substantially to the boreal winter CO2 efflux. Respiration is an exothermic process that produces enough heat to warm soils and promote further decomposition. We suggest that, as a result of this positive feedback, small changes in surface heat flux, associated with human activities in the North or with regional or global warming, could release large quantities of organic carbon that are presently stored in permafrost.",
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    AU - Zimov, S. A.

    AU - Davidov, S. P.

    AU - Voropaev, Y. V.

    AU - Prosiannikov, S. F.

    AU - Semiletov, I. P.

    AU - Chapin, M. C.

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