scholarly journals Multiscale variation in drought controlled historical forest fire activity in the boreal forests of eastern Fennoscandia

2017 ◽  
Vol 88 (1) ◽  
pp. 74-91 ◽  
Author(s):  
Tuomas Aakala ◽  
Leena Pasanen ◽  
Samuli Helama ◽  
Ville Vakkari ◽  
Igor Drobyshev ◽  
...  
Keyword(s):  
Forest Fire ◽  
Boreal Forests ◽  
Fire Activity ◽  
Historical Forest

Climate Change and Forest Fire Activity in North American Boreal Forests

2000 ◽  
pp. 368-376 ◽  
Author(s):  
Brian J. Stocks ◽  
Michael A. Fosberg ◽  
Michael B. Wotton ◽  
Timothy J. Lynham ◽  
Kevin C. Ryan
Keyword(s):  
Climate Change ◽  
Forest Fire ◽  
North American ◽  
Boreal Forests ◽  
Fire Activity

scholarly journals A 229-year dendroclimatic-inferred record of forest fire activity for the Boreal Shield of Canada

2006 ◽  
Vol 15 (3) ◽  
pp. 375 ◽  
Author(s):  
Martin P. Girardin ◽  
Yves Bergeron ◽  
Jacques C. Tardif ◽  
Sylvie Gauthier ◽  
Mike D. Flannigan ◽  
...  
Keyword(s):  
Forest Fire ◽  
Boreal Forests ◽  
Age Distribution ◽  
Occurrence Rate ◽  
Stand Age ◽  
Summer Drought ◽  
Fire Occurrence ◽  
Area Burned ◽  
Fire Activity ◽  
Boreal Shield

Six independent tree-ring reconstructions of summer drought were calibrated against instrumental fire data to develop a 229-year dendroclimatic-inferred record of fire activity (annual area burned and fire occurrence) on the Boreal Shield, Canada. As a means of validating the statistical reconstructions of the fire activity, a comparison was made with a stand age distribution derived from a regional time-since-last-fire map for an area located at the transition between the mixedwood and coniferous boreal forests of south-western Quebec. Calibration statistics indicated that 31% of the area burned variance and 45% of the fire occurrence variance could be accounted for by the six drought reconstructions. The verification statistics indicated a tendency for the statistical reconstructions of the fire activity to reproduce with confidence both high and relatively low frequency variations in fire. Episodes of succeeding years with important fire activity were estimated for 1789–1796, 1820–1823, 1837–1841, 1862–1866, 1906–1912, 1919–1922, 1933–1938, and 1974–1977. Also estimated were periods of reduced forest fire activity, particularly in the occurrence rate of extreme fire years, from c. 1850 to 1900 and again during the second half of the 20th century. Correlation analysis between the statistical reconstruction of the area burned and the stand age distribution suggested that both proxies shared similar information on the fire activity. Correlation maps, however, indicated that variability in the statistical reconstructions was not necessarily representative of fire activity in all regions of the Boreal Shield.

scholarly journals Risk of large-scale fires in boreal forests of Finland under changing climate

2016 ◽  
Vol 16 (1) ◽  
pp. 239-253 ◽  
Author(s):  
I. Lehtonen ◽  
A. Venäläinen ◽  
M. Kämäräinen ◽  
H. Peltola ◽  
H. Gregow
Keyword(s):  
Climate Change ◽  
Forest Fire ◽  
Forest Fires ◽  
Large Scale ◽  
Fire Danger ◽  
Short Period ◽  
Projected Change ◽  
Fire Activity ◽  
Model Variability ◽  
The Impact

Abstract. The target of this work was to assess the impact of projected climate change on forest-fire activity in Finland with special emphasis on large-scale fires. In addition, we were particularly interested to examine the inter-model variability of the projected change of fire danger. For this purpose, we utilized fire statistics covering the period 1996–2014 and consisting of almost 20 000 forest fires, as well as daily meteorological data from five global climate models under representative concentration pathway RCP4.5 and RCP8.5 scenarios. The model data were statistically downscaled onto a high-resolution grid using the quantile-mapping method before performing the analysis. In examining the relationship between weather and fire danger, we applied the Canadian fire weather index (FWI) system. Our results suggest that the number of large forest fires may double or even triple during the present century. This would increase the risk that some of the fires could develop into real conflagrations which have become almost extinct in Finland due to active and efficient fire suppression. However, the results reveal substantial inter-model variability in the rate of the projected increase of forest-fire danger, emphasizing the large uncertainty related to the climate change signal in fire activity. We moreover showed that the majority of large fires in Finland occur within a relatively short period in May and June due to human activities and that FWI correlates poorer with the fire activity during this time of year than later in summer when lightning is a more important cause of fires.

Linking tree rings, summer aridity, and regional fire data: an example from the boreal forests of the Komi Republic, East European Russia

2004 ◽  
Vol 34 (11) ◽  
pp. 2327-2339 ◽  
Author(s):  
Igor Drobyshev ◽  
Mats Niklasson
Keyword(s):  
Tree Ring ◽  
Boreal Forests ◽  
Fire Suppression ◽  
Siberian Larch ◽  
Komi Republic ◽  
Burned Area ◽  
Annual Number ◽  
Climate Data ◽  
Tree Ring Data ◽  
Fire Activity

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).

A 1000-yr record of forest fire activity from Eclipse Icefield, Yukon, Canada

The Holocene ◽  
2006 ◽  
Vol 16 (2) ◽  
pp. 200-209 ◽  
Author(s):  
Kaplan Yalcin ◽  
Cameron P. Wake ◽  
Karl J. Kreutz ◽  
Sallie I. Whitlow
Keyword(s):  
Forest Fire ◽  
Fire Activity

Forest fire activity in Sweden: Climatic controls and geographical patterns in 20th century

2012 ◽  
Vol 154-155 ◽  
pp. 174-186 ◽  
Author(s):  
Igor Drobyshev ◽  
Mats Niklasson ◽  
Hans W. Linderholm
Keyword(s):  
20Th Century ◽  
Forest Fire ◽  
Geographical Patterns ◽  
Fire Activity
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