PengApps2000

Référence

Peng, C. and Apps, M.J. (2000) Simulating global soil-CO2 flux and its response to climate change. Journal of Environmental Sciences, 12(3):257-265. (Scopus )

Résumé

It has been argued that increased soil respiration would become a major atmospheric source of CO2 in the event of global warming. The simple statistical models were developed based on a georeferenced with 0.5°X 0.5°longitude/latitude resolution to simulate global soil-CO2 fluxes, to investigate climatic effects on these fluxes using sensitivity experiments, and to assess possible responses of soil-CO2 fluxes to various climate change scenarios. The statistical models yield a value of 69 PgC/a of global soil-CO2 fluxes for current condition. Sensitivity experiments confirm that the fluxes are responsive to changes in temperature, precipitation and actual evapotranspiration, but increases in temperature and actual evapotranspiration affect soil-CO2 fluxes more than increases in precipitation. Using climatic change projections from four global circulation models, each corresponding to an equilibrium doubling of CO2, it can be found that the largest increases in soil-CO2 fluxes were associated with the boreal and tundra regions. The globally averaged soil-CO2 fluxes were estimated to increase by about 35% above current values, providing a positive feedback to the greenhouse effect.

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@ARTICLE { PengApps2000,
    AUTHOR = { Peng, C. and Apps, M.J. },
    TITLE = { Simulating global soil-CO2 flux and its response to climate change },
    JOURNAL = { Journal of Environmental Sciences },
    YEAR = { 2000 },
    VOLUME = { 12 },
    PAGES = { 257-265 },
    NUMBER = { 3 },
    ABSTRACT = { It has been argued that increased soil respiration would become a major atmospheric source of CO2 in the event of global warming. The simple statistical models were developed based on a georeferenced with 0.5°X 0.5°longitude/latitude resolution to simulate global soil-CO2 fluxes, to investigate climatic effects on these fluxes using sensitivity experiments, and to assess possible responses of soil-CO2 fluxes to various climate change scenarios. The statistical models yield a value of 69 PgC/a of global soil-CO2 fluxes for current condition. Sensitivity experiments confirm that the fluxes are responsive to changes in temperature, precipitation and actual evapotranspiration, but increases in temperature and actual evapotranspiration affect soil-CO2 fluxes more than increases in precipitation. Using climatic change projections from four global circulation models, each corresponding to an equilibrium doubling of CO2, it can be found that the largest increases in soil-CO2 fluxes were associated with the boreal and tundra regions. The globally averaged soil-CO2 fluxes were estimated to increase by about 35% above current values, providing a positive feedback to the greenhouse effect. },
    COMMENT = { Cited By (since 1996): 3 Export Date: 14 May 2012 Source: Scopus },
    ISSN = { 10010742 (ISSN) },
    KEYWORDS = { Climatic variable, Sensitivity experiment, Soil respiration, Statistical model, carbon dioxide, climate change, respiration, soil carbon },
    OWNER = { Luc },
    TIMESTAMP = { 2012.05.14 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-0033837897&partnerID=40&md5=515f1373068216aa22811a047969e72f },
}

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