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本文根据在林网内和旷野对照点草地的温、湿、风廓线和湍流观测资料,就林网对廓线分布规律的影响和湍流输送特征进行了分析。结果表明:林网对近地面层风速的减弱,及增温增湿是明显的。林网地区近地面层存在空气动力学异常现象,其高度可达到或超过树高的3—4倍。林网对边界层的影响高度可达8—10倍树高,并且对风廓线的影响要比对温度和水汽压廓线的影响更为明显。林网地区湍流宏观统计量σ_u/u、σ_v/u和σ_ω/u比Panofsky和Dutton(1984) ̄[1]著作中归纳的平原地区的结果系统偏低6—8%。σ_T/T的拟合系数旷野点比林网内大30%左右。在相同稳定度参数ξ值时,林网内近地面层的感热通量明显比旷野对照点草地上大。
Based on the data of temperature, humidity, wind profile and turbulence in grassland in the forest network and in the wilderness, this paper analyzed the influence of forest network on the profile distribution and turbulent transport characteristics. The results show that: the forest network on the near-surface wind speed weakened, and warming warming is obvious. There are aerodynamic anomalies near the surface layer in the Linwang area, which can reach 3-4 times or more than the height of the tree. The impact of the forest network on the boundary layer can be as high as 8-10 times the tree height, and the effect on the wind profile is more pronounced than on the temperature and vapor pressure profile. The macroscopic statistics σ_u / u, σ_v / u and σ_ω / u of the turbulence in the forest network are 6-8% lower than those in the plain areas summarized by Panofsky and Dutton (1984) ~ [1]. The fitting coefficient of σ_T / T is about 30% larger in the open field than in the forest network. At the same value of stability parameter ξ, the sensible heat flux of the near-surface layer in the forest network is obviously larger than that of the grassland in the wilderness.