Climatic impacts on the vegetation of eastern North America during the past 2000 years
作者： K. Gajewski
DOI: 10.1007/BF00114719
关键词:
摘要: Pollen diagrams from seven lakes with annually laminated sediments sampled at 40-year intervals are analyzed to isolate the climatic effects other on long-term dynamics of vegetation during past 1000–2000 years along a transect Maine Minnesota. Principal components analysis is used reduce dimensionality pollen data. The records all show trends, medium frequency oscillations, and higher fluctuations. trend associated neoglacial expansion boreal forest. mechanism causing this replacement change in air masses area. medium-frequency oscillations also climate changes, most recent which ‘Little Ice Age’. climate-related changes may be disturbance frequency. fluctuations related disturbance.
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