MaPengZhuEtAl2012

Référence

Ma, Z., Peng, C., Zhu, Q., Chen, H., Yu, G., Li, W., Zhou, X., Wang, W., Zhang, W. (2012) Regional drought-induced reduction in the biomass carbon sink of Canada's boreal forests. Proceedings of the National Academy of Sciences of the United States of America, 109(7):2423-2427. (Scopus )

Résumé

The boreal forests, identified as a critical "tipping element" of the Earth's climate system, play a critical role in the global carbon budget. Recent findings have suggested that terrestrial carbon sinks in northern high-latitude regions are weakening, but there has been little observational evidence to support the idea of a reduction of carbon sinks in northern terrestrial ecosystems. Here, we estimated changes in the biomass carbon sink of natural stands throughout Canada's boreal forests using data from long-term forest permanent sampling plots. We found that in recent decades, the rate of biomass change decreased significantly in western Canada (Alberta, Saskatchewan, and Manitoba), but there was no significant trend for eastern Canada (Ontario and Quebec). Our results revealed that recent climate change, and especially drought-induced water stress, is the dominant cause of the observed reduction in the biomass carbon sink, suggesting that western Canada's boreal forests may become net carbon sources if the climate change-induced droughts continue to intensify.

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@ARTICLE { MaPengZhuEtAl2012,
    AUTHOR = { Ma, Z. and Peng, C. and Zhu, Q. and Chen, H. and Yu, G. and Li, W. and Zhou, X. and Wang, W. and Zhang, W. },
    TITLE = { Regional drought-induced reduction in the biomass carbon sink of Canada's boreal forests },
    JOURNAL = { Proceedings of the National Academy of Sciences of the United States of America },
    YEAR = { 2012 },
    VOLUME = { 109 },
    PAGES = { 2423-2427 },
    NUMBER = { 7 },
    ABSTRACT = { The boreal forests, identified as a critical "tipping element" of the Earth's climate system, play a critical role in the global carbon budget. Recent findings have suggested that terrestrial carbon sinks in northern high-latitude regions are weakening, but there has been little observational evidence to support the idea of a reduction of carbon sinks in northern terrestrial ecosystems. Here, we estimated changes in the biomass carbon sink of natural stands throughout Canada's boreal forests using data from long-term forest permanent sampling plots. We found that in recent decades, the rate of biomass change decreased significantly in western Canada (Alberta, Saskatchewan, and Manitoba), but there was no significant trend for eastern Canada (Ontario and Quebec). Our results revealed that recent climate change, and especially drought-induced water stress, is the dominant cause of the observed reduction in the biomass carbon sink, suggesting that western Canada's boreal forests may become net carbon sources if the climate change-induced droughts continue to intensify. },
    COMMENT = { Export Date: 15 May 2012 Source: Scopus CODEN: PNASA doi: 10.1073/pnas.1111576109 },
    ISSN = { 00278424 (ISSN) },
    KEYWORDS = { Drought index, Forest aboveground biomass, Global warming, Northern hemisphere carbon uptake, Positive feedback, article, biomass, Canada, carbon sink, carbon source, climate change, drought, precipitation, priority journal, taiga, water stress, Biomass, Canada, Carbon, Droughts, Trees },
    OWNER = { Luc },
    TIMESTAMP = { 2012.05.15 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84857137315&partnerID=40&md5=6f12e6baf42e6f7dd2299f620aef9bac },
}

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