摘要
在人工林生态系统中,植被与大气之间以湍流的形式不断地进行动量、热量和水分交换,交换过程与下垫面的某些空气动力特征有关。
Wind speed is measuied in and above sand-holding forest and above fixed dune at Zhanggutai in 1987 and 1988.The measuied wind speed profiles are employed to evaluate theaerodynamic characteristics and their relations with wind speed for sand-holdi(?)f forest.Thezero plane displacement D,roughness length Z_0 and plant drag coefficient C_d are estimatedas 7.71m,0.93m and 0.13m respectively for the sand-holding forest with an average heightof 9.2m at moderate windiness.These characteristic values increase with increasing windspeed.Above canopy,turbulent parameter Ka increases and aero dynamic resistance ra decreases compared with those above fixed dune.Aerody(?)amic effects under the canopy appearto be reduced.
出处
《生态学杂志》
CAS
CSCD
北大核心
1990年第6期31-35,共5页
Chinese Journal of Ecology
关键词
樟子松
固沙林
动力效应
Mongolian Scotch pine
sand-holding forest
aerodynamic effect
