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Climate change has increased the area affected by forest fires each year in boreal North America. Increases in burned area and fire frequency are expected to stimulate boreal carbon losses. However, the impact of wildfires on carbon emissions is also affected by the severity of burning. How climate change influences the severity of biomass burning has proved difficult to assess. Here, we examined the depth of ground-layer combustion in 178 sites dominated by black spruce in Alaska, using data collected from 31 fire events between 1983 and 2005. We show that the depth of burning increased as the fire season progressed when the annual area burned was small. However, deep burning occurred throughout the fire season...
There is little doubt in the scientific community that if the current patterns of climate warming continue, there will be dramatic changes in the distribution of vegetation and forest cover throughout the boreal region. Most research has concentrated on predicting how rises in air temperature will (1) cause shifts in vegetation cover and the carbon balance in the terrestrial biome (Smith and Shugart 1993) or (2) change rates of soil respiration (Townsend et al. 1992; Randerson et al. 1996; Thompson et al. 1997). Recently, more sophisticated biogeochemical cycling models have been developed that actually model the processes responsible for carbon storage in vegetation to assess changes in the terrestrial carbon budget...
There is little doubt in the scientific community that if the current patterns of climate warming continue, there will be dramatic changes in the distribution of vegetation and forest cover throughout the boreal region. Most research has concentrated on predicting how rises in air temperature will (1) cause shifts in vegetation cover and the carbon balance in the terrestrial biome (Smith and Shugart 1993) or (2) change rates of soil respiration (Townsend et al. 1992; Randerson et al. 1996; Thompson et al. 1997). Recently, more sophisticated biogeochemical cycling models have been developed that actually model the processes responsible for carbon storage in vegetation to assess changes in the terrestrial carbon budget...


map background search result map search result map Indirect and Long-Term Effects of Fire on the Boreal Forest Carbon Budget Controls on Patterns of Biomass Burning in Alaskan Boreal Forests Influence of Fire on Long-Term Patterns of Forest Succession in Alaskan Boreal Forests Variation in postfire organic layer thickness in a black spruce forest complex in interior Alaska and its effects on soil temperature and moisture Evaluating the potential of Landsat TM/ETM+ imagery for assessing fire severity in Alaskan black spruce forests Recent changes in the fire regime across the North American boreal region—Spatial and temporal patterns of burning across Canada and Alaska Variation in postfire organic layer thickness in a black spruce forest complex in interior Alaska and its effects on soil temperature and moisture Controls on Patterns of Biomass Burning in Alaskan Boreal Forests Indirect and Long-Term Effects of Fire on the Boreal Forest Carbon Budget Influence of Fire on Long-Term Patterns of Forest Succession in Alaskan Boreal Forests Evaluating the potential of Landsat TM/ETM+ imagery for assessing fire severity in Alaskan black spruce forests Recent changes in the fire regime across the North American boreal region—Spatial and temporal patterns of burning across Canada and Alaska