DOI: 10.1007/s00382-011-1064-7
Scopus记录号: 2-s2.0-84860340964
论文题名: The effects of boreal forest expansion on the summer Arctic frontal zone
作者: Liess S. ; Snyder P.K. ; Harding K.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期: 2017-09-10 起始页码: 1805
结束页码: 1827
语种: 英语
英文关键词: Arctic
; Arctic front
; Boreal forest
; Climate change
英文摘要: Over the last 100 years, Arctic warming has resulted in a longer growing season in boreal and tundra ecosystems. This has contributed to a slow northward expansion of the boreal forest and a decrease in the surface albedo. Corresponding changes to the surface and atmospheric energy budgets have contributed to a broad region of warming over areas of boreal forest expansion. In addition, mesoscale and synoptic scale patterns have changed as a result of the excess energy at and near the surface. Previous studies have identified a relationship between the positioning of the boreal forest-tundra ecotone and the Arctic frontal zone in summer. This study examines the climate response to hypothetical boreal forest expansion and its influence on the summer Arctic frontal zone. Using the Weather Research and Forecasting model over the Northern Hemisphere, an experiment was performed to evaluate the atmospheric response to expansion of evergreen and deciduous boreal needleleaf forests into open shrubland along the northern boundary of the existing forest. Results show that the lower surface albedo with forest expansion leads to a local increase in net radiation and an average hemispheric warming of 0. 6°C at and near the surface during June with some locations warming by 1-2°C. This warming contributes to changes in the meridional temperature gradient that enhances the Arctic frontal zone and strengthens the summertime jet. This experiment suggests that continued Northern Hemisphere high-latitude warming and boreal forest expansion might contribute to additional climate changes during the summer. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55302
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Soil, Water, and Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, Saint Paul, MN 55108, United States
Recommended Citation:
Liess S.,Snyder P.K.,Harding K.J.. The effects of boreal forest expansion on the summer Arctic frontal zone[J]. Climate Dynamics,2012-01-01,38(2017-09-10)