DrobyshevNiklasson2004

Référence

Drobyshev, I., Niklasson, M. (2004) Linking tree rings, summer aridity, and regional fire data: An example from the boreal forests of the Komi Republic, East European Russia. Canadian Journal of Forest Research, 34(11):2327-2339. (Scopus )

Résumé

To evaluate the potential use of tree-ring data as a proxy for fire activity at the scale of a large boreal region, we analyzed a set of regional tree-ring chronologies of Siberian larch (Larix sibirica L.), a spatially implicit annual fire record, and monthly climate data for the Komi Republic for the period 1950-1990. In most years, annually burned area was below 0.001% of the republic's forested area and reached up to 0.7% during fire-prone years. Principal components (PC) of summer aridity resolved 64.2% of the annual variation in the number of fires, 12.2% in the average fire size, and 59.2% in the annually burned area. In turn, tree-ring PCs explained 65.2% of variation in fire-related weather PCs. Dendrochronological reconstruction of the annual number of fires and of the log-transformed annually burned area predicted 27.0% and 40.1% of the high-frequency variance of these variables, respectively. Coefficient of efficiency, a measure of reconstruction usefulness, reached 0.081 (number of fires) and 0.315 (annual area burned), supporting the obtained index as a realistic proxy for regional fire activity. Decadal variation in coefficient of efficiency values suggested improved monitoring accuracy since 1960 and more effective fire suppression during the last studied decade (1980-1990). © 2004 NRC Canada.

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@ARTICLE { DrobyshevNiklasson2004,
    AUTHOR = { Drobyshev, I. and Niklasson, M. },
    TITLE = { Linking tree rings, summer aridity, and regional fire data: An example from the boreal forests of the Komi Republic, East European Russia },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2004 },
    VOLUME = { 34 },
    PAGES = { 2327-2339 },
    NUMBER = { 11 },
    NOTE = { cited By (since 1996)7 },
    ABSTRACT = { To evaluate the potential use of tree-ring data as a proxy for fire activity at the scale of a large boreal region, we analyzed a set of regional tree-ring chronologies of Siberian larch (Larix sibirica L.), a spatially implicit annual fire record, and monthly climate data for the Komi Republic for the period 1950-1990. In most years, annually burned area was below 0.001% of the republic's forested area and reached up to 0.7% during fire-prone years. Principal components (PC) of summer aridity resolved 64.2% of the annual variation in the number of fires, 12.2% in the average fire size, and 59.2% in the annually burned area. In turn, tree-ring PCs explained 65.2% of variation in fire-related weather PCs. Dendrochronological reconstruction of the annual number of fires and of the log-transformed annually burned area predicted 27.0% and 40.1% of the high-frequency variance of these variables, respectively. Coefficient of efficiency, a measure of reconstruction usefulness, reached 0.081 (number of fires) and 0.315 (annual area burned), supporting the obtained index as a realistic proxy for regional fire activity. Decadal variation in coefficient of efficiency values suggested improved monitoring accuracy since 1960 and more effective fire suppression during the last studied decade (1980-1990). © 2004 NRC Canada. },
    CODEN = { CJFRA },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/X04-112 },
    ISSN = { 00455067 },
    KEYWORDS = { Climatology; Forestry; Principal component analysis, Boreal regions; Climate data; Summer aridity; Tree ring data, Fire hazards, aridity; boreal forest; dendrochronology; fire history; tree ring, Combustion; Forest Fires; Meteorology; Trees; Variables, Eastern Hemisphere; Eurasia; Komi; Russian Federation; World },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-14844295554&partnerID=40&md5=c0555b7a40b04b332be957df739b9dc4 },
}

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