DrobyshevBergeronVernalEtAl2016

Référence

Drobyshev, I., Bergeron, Y., Vernal, A.D., Moberg, A., Ali, A.A., Niklasson, M. (2016) Atlantic SSTs control regime shifts in forest fire activity of Northern Scandinavia. Scientific Reports, 6. (Scopus )

Résumé

Understanding the drivers of the boreal forest fire activity is challenging due to the complexity of the interactions driving fire regimes. We analyzed drivers of forest fire activity in Northern Scandinavia (above 60 N) by combining modern and proxy data over the Holocene. The results suggest that the cold climate in northern Scandinavia was generally characterized by dry conditions favourable to periods of regionally increased fire activity. We propose that the cold conditions over the northern North Atlantic, associated with low SSTs, expansion of sea ice cover, and the southward shift in the position of the subpolar gyre, redirect southward the precipitation over Scandinavia, associated with the westerlies. This dynamics strengthens high pressure systems over Scandinavia and results in increased regional fire activity. Our study reveals a previously undocumented teleconnection between large scale climate and ocean dynamics over the North Atlantic and regional boreal forest fire activity in Northern Scandinavia. Consistency of the pattern observed annually through millennium scales suggests that a strong link between Atlantic SST and fire activity on multiple temporal scales over the entire Holocene is relevant for understanding future fire activity across the European boreal zone.

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@ARTICLE { DrobyshevBergeronVernalEtAl2016,
    AUTHOR = { Drobyshev, I. and Bergeron, Y. and Vernal, A.D. and Moberg, A. and Ali, A.A. and Niklasson, M. },
    TITLE = { Atlantic SSTs control regime shifts in forest fire activity of Northern Scandinavia },
    JOURNAL = { Scientific Reports },
    YEAR = { 2016 },
    VOLUME = { 6 },
    NOTE = { cited By 0 },
    ABSTRACT = { Understanding the drivers of the boreal forest fire activity is challenging due to the complexity of the interactions driving fire regimes. We analyzed drivers of forest fire activity in Northern Scandinavia (above 60 N) by combining modern and proxy data over the Holocene. The results suggest that the cold climate in northern Scandinavia was generally characterized by dry conditions favourable to periods of regionally increased fire activity. We propose that the cold conditions over the northern North Atlantic, associated with low SSTs, expansion of sea ice cover, and the southward shift in the position of the subpolar gyre, redirect southward the precipitation over Scandinavia, associated with the westerlies. This dynamics strengthens high pressure systems over Scandinavia and results in increased regional fire activity. Our study reveals a previously undocumented teleconnection between large scale climate and ocean dynamics over the North Atlantic and regional boreal forest fire activity in Northern Scandinavia. Consistency of the pattern observed annually through millennium scales suggests that a strong link between Atlantic SST and fire activity on multiple temporal scales over the entire Holocene is relevant for understanding future fire activity across the European boreal zone. },
    ART_NUMBER = { 22532 },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1038/srep22532 },
    KEYWORDS = { cold climate; cold stress; driver; drought; forest; Holocene; precipitation; Scandinavia; sea ice; taiga },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84960540742&partnerID=40&md5=516ad24a2db4b8f4d0cb05f1779bdc4a },
}

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