Persistent and pervasive compositional shifts of western boreal forest plots in Canada

2016 ◽  
Vol 23 (2) ◽  
pp. 857-866 ◽  
Author(s):  
Eric B. Searle ◽  
Han Y. H. Chen
Keyword(s):  
Boreal Forest ◽  
Western Boreal Forest

scholarly journals Effects of lightning and other meteorological factors on fire activity in the North American boreal forest: implications for fire weather forecasting

2010 ◽  
Vol 10 (14) ◽  
pp. 6873-6888 ◽  
Author(s):  
D. Peterson ◽  
J. Wang ◽  
C. Ichoku ◽  
L. A. Remer
Keyword(s):  
Boreal Forest ◽  
North American ◽  
Meteorological Factors ◽  
Convective Available Potential Energy ◽  
Fire Weather ◽  
Lightning Strikes ◽  
The North ◽  
Lightning Detection ◽  
Western Boreal Forest ◽  
Consecutive Dry Days

Abstract. The effects of lightning and other meteorological factors on wildfire activity in the North American boreal forest are statistically analyzed during the fire seasons of 2000–2006 through an integration of the following data sets: the MODerate Resolution Imaging Spectroradiometer (MODIS) level 2 fire products, the 3-hourly 32-km gridded meteorological data from North American Regional Reanalysis (NARR), and the lightning data collected by the Canadian Lightning Detection Network (CLDN) and the Alaska Lightning Detection Network (ALDN). Positive anomalies of the 500 hPa geopotential height field, convective available potential energy (CAPE), number of cloud-to-ground lightning strikes, and the number of consecutive dry days are found to be statistically important to the seasonal variation of MODIS fire counts in a large portion of Canada and the entirety of Alaska. Analysis of fire occurrence patterns in the eastern and western boreal forest regions shows that dry (in the absence of precipitation) lightning strikes account for only 20% of the total lightning strikes, but are associated with (and likely cause) 40% of the MODIS observed fire counts in these regions. The chance for ignition increases when a threshold of at least 10 dry strikes per NARR grid box and at least 10 consecutive dry days is reached. Due to the orientation of the large-scale pattern, complex differences in fire and lightning occurrence and variability were also found between the eastern and western sub-regions. Locations with a high percentage of dry strikes commonly experience an increased number of fire counts, but the mean number of fire counts per dry strike is more than 50% higher in western boreal forest sub-region, suggesting a geographic and possible topographic influence. While wet lightning events are found to occur with a large range of CAPE values, a high probability for dry lightning occurs only when 500 hPa geopotential heights are above ~5700 m and CAPE values are near the maximum observed level, underscoring the importance of low-level instability to boreal fire weather forecasts.

scholarly journals Utikuma Region Study Area (URSA) – Part 1: Hydrogeological and ecohydrological studies (HEAD)

2016 ◽  
Vol 92 (01) ◽  
pp. 57-61 ◽  
Author(s):  
Kevin J. Devito ◽  
Carl Mendoza ◽  
Richard M. Petrone ◽  
Nick Kettridge ◽  
James M. Waddington
Keyword(s):  
Boreal Forest ◽  
Conceptual Understanding ◽  
Natural Disturbance ◽  
Spatially Explicit ◽  
Forest Research ◽  
Boreal Plains ◽  
Process Studies ◽  
Hydrogeological Studies ◽  
Western Boreal Forest

The Utikuma Region Study Area (URSA) was initiated to develop spatially explicit modelling tools to predict the cumulative impacts of land use and natural disturbance on the Boreal Plains (BP) ecozone of the Western Boreal Forest. Research comprised several multi-year projects, spanning wet and dry climate periods that combined intensive detailed process studies at seven watersheds with extensive long-term ecohydrological and hydrogeological studies conducted across a 60-km transect representing the range of glaciated landforms characteristic of the sub-humid boreal forest in Alberta. These studies have improved our conceptual understanding and capacity to numerically model how climate and geology influence water and energy flow, and the hydrologic linkages and natural variability of the key processes influencing BP ecosystems. Eco-hydrogeological frameworks have been developed for designing, conducting, interpreting, and extrapolating research results for watershed management and construction across the Boreal Plain ecozone.

Archeology: Far Western Boreal Forest

Science ◽  
1965 ◽  
Vol 148 (3676) ◽  
pp. 1451-1451
Author(s):  
J. M. Campbell
Keyword(s):  
Boreal Forest ◽  
Western Boreal Forest

TROPHIC RELATIONS OF THE RED-NECKED GREBE ON LAKES IN THE WESTERN BOREAL FOREST: A STABLE-ISOTOPE ANALYSIS

The Condor ◽  
10.1650/7440 ◽  
2004 ◽  
Vol 106 (3) ◽  
pp. 638 ◽  
Author(s):  
Cynthia A. Paszkowski ◽  
Beverly A. Gingras ◽  
Kayedon Wilcox ◽  
Paul H. Klatt ◽  
William M. Tonn
Keyword(s):  
Stable Isotope ◽  
Boreal Forest ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Trophic Relations ◽  
Western Boreal Forest

Dynamics of evapotranspiration from a riparian pond complex in the Western Boreal Forest, Alberta, Canada

2007 ◽  
Vol 21 (11) ◽  
pp. 1391-1401 ◽  
Author(s):  
R. M. Petrone ◽  
U. Silins ◽  
K. J. Devito
Keyword(s):  
Boreal Forest ◽  
Western Boreal Forest
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