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Keyword: boreal forest

Wind speed and relative humidity influence spatial patterns of burn severity in boreal forests of northeastern China

Publications Posted on: October 05, 2018
We investigated relationships between the spatial patterns of burn severity in Chinese boreal forests and weather parameters. Patch size, shape and arrangement differed between high-severity and low/moderate-severity patches.Wind speed and relative humidity were dominant weather parameters of spatial variation in burn severity.

Silviculture's role in managing boreal forests

Publications Posted on: March 30, 2018
Boreal forests, which are often undeveloped, are a major source of raw materials for many countries. They are circumpolar in extent and occupy a belt to a width of 1000 km in certain regions. Various conifer and hardwood species ranging from true firs to poplars grow in boreal forests. These species exhibit a wide range of shade tolerance and growth characteristics, and occupy different successional positions.

Contributions of ignitions, fuels, and weather to the spatial patterns of burn probability of a boreal landscape

Publications Posted on: March 22, 2012
The spatial pattern of fire observed across boreal landscapes is the outcome of complex interactions among components of the fire environment. We investigated how the naturally occurring patterns of ignitions, fuels, and weather generate spatial pattern of burn probability (BP) in a large and highly fireprone boreal landscape of western Canada, Wood Buffalo National Park.

Boreal forest fire emissions in fresh Canadian smoke plumes: C1-C10 volatile organic compounds (VOCs), CO2, CO, NO2, NO, HCN and CH3CN

Publications Posted on: October 07, 2011
Boreal regions comprise about 17% of the global land area, and they both affect and are influenced by climate change. To better understand boreal forest fire emissions and plume evolution, 947 whole air samples were collected aboard the NASA DC-8 research aircraft in summer 2008 as part of the ARCTAS-B field mission, and analyzed for 79 non-methane volatile organic compounds (NMVOCs) using gas chromatography.

Effect of wildfire and fireline construction on the annual depth of thaw in a black spruce permafrost forest in interior Alaska: a 36-year record of recovery

Publications Posted on: March 19, 2009
Maximum thaw depths were measured annually in an unburned stand, a heavily burned stand, and a fireline in and adjacent to the 1971 Wickersham fire. Maximum thaw in the unburned black spruce stand ranged from 36 to 52 cm. In the burned stand, thaw increased each year to a maximum depth of 302 cm in 1995. In 1996, the entire layer of seasonal frost remained, creating a new active layer depth at 78 cm.

Relationships between prefire composition, fire impact, and postfire legacies in the boreal forest of Eastern Canada

Publications Posted on: September 18, 2007
Canadian mixedwood forests have a high compositional and structural diversity. It includes both hardwood (aspen, balsam poplar, and white birch) and softwood (balsam fir, white spruce, black spruce, larch, and white cedar) species that can form pure stands or mixed stands. This heterogeneity results in a variety of vertical structural strata that can potentially interact with fire behaviour.

Conservation assessment for great-spurred violet in the Black Hills National Forest, South Dakota and Wyoming

Publications Posted on: July 27, 2006
Great-spurred violet (Viola selkirkii Pursh ex Goldie; Violaceae) is an early spring flowering herb that occurs in the boreal and Rocky Mountain regions of North America, and cool temperate regions of Eurasia, eastern China and Japan. In the Black Hills, the species is restricted to spruce-dominated forests in cold, shady ravines from 5,400 to 7,000 ft (1,645 to 2,135 m) elevation on soils derived from granitic parent material.