摘要
地表粗糙度和零平面位移是2个重要的空气动力学参数,对于城市下垫面,粗糙元的形态非常复杂,空间分布上存在较大的非均匀性,如何确定城市下垫面地表粗糙度和零平面位移目前尚无最佳方案。概述了这2个参数适用于城市非均匀下垫面的参数化方法,包括风温观测方法和粗糙元形态学方法。探讨了各自在应用过程中存在的问题及进一步的研究工作,并且提出,通过数学模型的改进和卫星遥感技术的引入,粗糙元形态学方法会有更好的发展前景。
Surface roughness and zero-plane displacement are two important aerodynamic parameters. In the urban underlying surface, the spatial distributions of roughness elements with multiple shapes are very complex and inhomogeneous. Therefore,there has been no optimal method to determine the two parameters over urban underlying surface. The parameterization methods of the two parameters over urban inhomogeneous underlying surface were summarized in this paper, including the wind and temperature observations and the roughness elements morphology method. The existing problems applying these methods were discussed, and the further tasks were suggested. It is concluded that the roughness element morphology method will have better prospects for the improvement of mathematical models and the introduction of satdlite remote sensing technique.
出处
《气象与环境学报》
2008年第5期55-60,共6页
Journal of Meteorology and Environment
关键词
城市非均匀下垫面
地表粗糙度
零平面位移
参数化
Urban inhomogeneous underlying surface
Surface roughness
Zero-plane displacement
Parameterization
