农田与草地下垫面空气动力学粗糙度的研究

发布时间：2018-04-01 00:32

  本文选题：空气动力学粗糙度　切入点：估算方法　出处：《科技通报》2016年08期

【摘要】：利用2010年馆陶站和阿柔站涡动相关仪和自动气象观测资料,运用Yang et al.方法估算空气动力学粗糙度,分析了空气动力学粗糙度的时空变化特征,并将估算值与Brutsaert、Monteith、Zeng andWang、Bastiaanssen and Bandara、Teixeira五种参数化方案进行比较。结果表明:(1)空气动力学粗糙度与风向的关系取决于下垫面的非均匀程度;农田下垫面的空气动力学粗糙度随风向变化明显,具有方向性。(2)空气动力学粗糙度的季节性变化取决于下垫面植被(农田和草地)的季节性变化,与植被高度呈显著线性关系,与叶面积指数呈抛物线关系。(3)对于农田、草地下垫面而言,计算结果与Yang et al.方法估算值较为接近的参数化方案分别为Bastiaanssen and Bandara、Brutsaert。
[Abstract]:Based on the vortex correlator and automatic meteorological observation data of Guantao and Arou stations in 2010, the aerodynamic roughness is estimated by using Yang et al. method, and the temporal and spatial variation characteristics of aerodynamic roughness are analyzed. The results show that the relationship between aerodynamic roughness and wind direction depends on the degree of inhomogeneity of the underlying surface, and that the aerodynamic roughness of the underlying surface varies obviously with the wind direction, and compared with the five parameterized schemes of Brutsaertv Monteithaanssen and Wang Bastiaanssen and Bandaraen Teixeira, the results show that the relationship between the aerodynamic roughness and the wind direction depends on the inhomogeneity of the underlying surface. The seasonal variation of aerodynamics roughness depends on the seasonal variation of underlying vegetation (farmland and grassland), and has a significant linear relationship with vegetation height and parabola with leaf area index. In terms of grassland underlying surface, the calculated results are close to that of Yang et al.Methods the parameterized schemes are Bastiaanssen and Bandara Brutsaert, respectively.
【作者单位】： 南京信息工程大学大气环境中心;中国气象局气象干部培训学院湖北分院;北京师范大学遥感科学国家重点实验室地理学与遥感科学学院;武汉区域气候中心;
【基金】：中央高校基本科研业务费专项资金 国家自然科学基金项目(编号:40971194);(编号:30911130504)资助
【分类号】：O355
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本文编号：1693195