摘要
气孔导度是衡量植物和大气间水分、能量及CO2平衡和循环的重要指标,探讨气孔导度在叶片、冠层及区域尺度间的尺度转换及累积效应,对更好地认识植被与大气间的水热运移过程,合理评价植被在陆面过程中的地位和作用具有重要意义。本文着重从叶片尺度气孔导度模拟、气孔导度在冠层尺度的累积表现、冠层到区域尺度转换研究及气孔导度累积效应在陆面过程模型中的作用等4个层次总结了近期国内外研究状况,指出其中存在的异质性等问题,并就今后应加强多尺度间的同步观测提出了展望。
Stomatal conductance is a key indicator in evaluating the balance and cycle of heat, H2O and CO2 fluxes between vegetation-atmosphere interface, and its simulation is a basis for discussing the heat and H2O transfer in soil-vegetation-atmosphere continuum system. The study on the scaling and cumulative effect of stomatal conductance between leaf, canopy and regional scales is helpful to better understand the heat and H2O transfer processes between vegetation-atmosphere interface, and to properly evaluate the status and functions of vegetation in land surface processes. In this paper, the recent studies on stomatal conductance modeling at leaf level, cumulative effect of stomatal conductace at canopy level, scaling from canopy to regional scale, and functions of cumulative effect of stomatal conductance in land surface processes modeling were summed. The problems exsisting in related studies, such as heterogeneities, were pointed out, and the multi-scale synchronous observations that should be emphasized in the future studies were discussed.
出处
《生态学杂志》
CAS
CSCD
北大核心
2008年第3期454-459,共6页
Chinese Journal of Ecology
基金
国家自然科学基金资助项目(40605007)
关键词
气孔导度
累积效应
尺度转换
陆面过程
stomatal conductance
cumulative effect
scaling
land surface process.
