论文部分内容阅读
用二层模式下的斜压波模型,讨论了山地林区垂直风速切变对波动不稳定的影响,指出这是山地林区降水随高度增加的主要原因之一。 随着林区透风结构的变异,林区所形成的垂直风速切变是不同的:大范围紧密结构的原始林区形成的切变较强,降水增加较明显;稀疏林区形成的切变较弱,降水增加就不显著。对原始林区的大面积皆伐则导致林区降水减少,生态平衡失调。
The effect of vertical wind shear in mountainous area on the instability was discussed by using the baroclinic model under the two - layer model. It is pointed out that this is one of the main reasons for the increase of precipitation in the mountainous forest area. With the variation of the ventilation structure in the forest area, the vertical wind shear rates formed in the forest area are different: the shear strength of the original forest area with large-scale close structure is strong, and the precipitation increases more obviously; the shear deformation of the sparse forest area Weak, precipitation increase is not significant. The large-scale clear cutting of the original forest area leads to the decrease of precipitation in the forest area and the imbalance of ecological balance.