Forest succession and climate variability interacted to control fire activity over the last four centuries in an Alaskan boreal landscape
Forest succession and climate variability interacted to control fire activity over the last four centuries in an Alaskan boreal landscape
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过去四个世纪，阿拉斯加北方地区的森林演替和气候变化相互作用，控制了火灾活动
DOI：
10.1007/s10980-018-00766-8
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发表时间：
2019
影响因子：
5.2
通讯作者：
Higuera, Philip E.
中科院分区：
文献类型：
--
作者：
Hoecker, Tyler J.;Higuera, Philip E.
北方森林对地球能量平衡的影响和对气候变化的敏感性具有全球重要性。北方森林的生态系统功能是由火灾活动形成的，因此预测气候变化的影响需要了解火灾制度中气候引起的变化的优先顺序和后果。长期记录的气候，火灾和植被是至关重要的，为获得这种understanding.ObjectivesWe调查的相对重要性，气候和景观可燃性作为驱动因素的火灾活动在北方森林发展高分辨率记录的火灾历史，并表征其百年尺度的关系，以温度和植被dynamic.MethodsWe重建的时间火灾活动在美国阿拉斯加州内陆，使用七个湖泊沉积物木炭记录跨越CE 1550-2015。我们开发了个人和复合记录的火灾活动，并使用相关性和定性比较，以评估与现有记录的植被和climate.ResultsOur记录的关系记录气候和火灾之间的动态关系。火灾活动与温度的耦合作用较强。1900年比前350年。生物质燃烧和温度在20世纪后半期同时上升，达到有记录以来的最高点。火灾活动的脉冲在黑云杉establishment.ConclusionsFire活动促进温暖的温度和高度易燃的成熟黑云杉的规模优势，在二十一世纪的温度和火灾活动的显着增加。研究结果表明，在景观尺度上的广泛燃烧是由气候和植被动力学共同驱动的可燃性相结合。
ContextThe boreal forest is globally important for its influence on Earth’s energy balance, and its sensitivity to climate change. Ecosystem functioning in boreal forests is shaped by fire activity, so anticipating the impacts of climate change requires understanding the precedence for, and consequences of, climatically induced changes in fire regimes. Long-term records of climate, fire, and vegetation are critical for gaining this understanding.ObjectivesWe investigated the relative importance of climate and landscape flammability as drivers of fire activity in boreal forests by developing high-resolution records of fire history, and characterizing their centennial-scale relationships to temperature and vegetation dynamics.MethodsWe reconstructed the timing of fire activity in interior Alaska, USA, using seven lake-sediment charcoal records spanning CE 1550–2015. We developed individual and composite records of fire activity, and used correlations and qualitative comparisons to assess relationships with existing records of vegetation and climate.ResultsOur records document a dynamic relationship between climate and fire. Fire activity and temperature showed stronger coupling after ca. 1900 than in the preceding 350 yr. Biomass burning and temperatures increased concurrently during the second half of the twentieth century, to their highest point in the record. Fire activity followed pulses in black spruce establishment.ConclusionsFire activity was facilitated by warm temperatures and landscape-scale dominance of highly flammable mature black spruce, with a notable increase in temperature and fire activity during the twenty-first century. The results suggest that widespread burning at landscape scales is controlled by a combination of climate and vegetation dynamics that together drive flammability.
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北美东北部定居点前火灾区域的当地和区域沉积物木炭证据
影响因子：
5.5
作者：
J. Clark;P. Royall
通讯作者：
P. Royall
火灾和植被动态：火灾和植被动态
DOI：
--
发表时间：
1992
期刊：
影响因子：
--
作者：
E. Johnson
通讯作者：
E. Johnson
影响因子：
9.4
作者：
Girardin, Martin P.;Ali, Adam A.;Bergeron, Yves
通讯作者：
Bergeron, Yves
全球北方森林的系统分析：火灾作为北美北方森林的控制过程
影响因子：
8.8
作者：
S. Payette
通讯作者：
S. Payette
土地覆盖影响北方森林火灾对气候变化的反应：阿拉斯加历史记录的地理空间分析
影响因子：
5.2
作者：
C. Dash;J. Fraterrigo;F. Hu
通讯作者：
F. Hu