A comparative study of the surface and active layer conditions at disturbedforest sites near Yakutsk
A comparative study of the surface and active layer conditions at disturbedforest sites near Yakutsk
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雅库茨克附近受干扰森林地表和活性层条件的比较研究
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
M. Fukuda
中科院分区：
文献类型：
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作者：
Yakutsk;G. Iwahana;M. Fukuda
为了评估地表条件变化对活动层特征的影响，在2001年融化季节在东西伯利亚雅库茨克附近的7个不同地点监测了活动层的热和水文特性。这些森林网站在不同的状态后干扰恢复，包括落叶松林作为对照网站。在植被干扰后的初期，尽管净辐射减少，但活动层厚度和地面热通量显著增加。此外，蒸散被强烈阻碍，使土壤水分在活动层的积累。在植被干扰后5 ~ 19年，净辐射增加，地面热通量下降，融化深度下降到初始水平，植被恢复。结果表明，在这一地区，干扰森林往往恢复其初始的活跃层的条件，植被恢复，除非深，快速融化的富含冰的永久冻土发生。Permafrost，菲利普斯，Springman & Arenson（eds）© 2003 Swets & Zeitlinger，利塞，ISBN 90 5809 582 7
To assess the impact of changes in ground surface conditions on active layer characteristics, thermal and hydrological properties in the active layer were monitored during the melting season in 2001 at seven different sites near Yakutsk, Eastern Siberia. These forest sites were in different states of post-disturbance recovery including a larch stand as a control site. In the initial period after vegetation disturbance, active layer thickness and ground heat flux increased significantly in spite of decreased net radiation. Further, evapotranspiration was strongly impeded allowing the accumulation of soil water in the active layer. At sites 5 to 19 years after vegetation disturbance, net radiation increased, ground heat flux decreased, and thaw depths decreased to the initial level with vegetation recovered. The results suggest that in this region disturbed forest tends to regain its initial active layer conditions as vegetation recovers unless deep, rapid thawing of ice-rich permafrost occurs. Permafrost, Phillips, Springman & Arenson (eds) © 2003 Swets & Zeitlinger, Lisse, ISBN 90 5809 582 7