Interaction of aerodynamic roughness length and windflow conditions and its parameterization over vegetation surface
作者: Qiang ZhangJian ZengTong Yao
作者单位: 1China Meteorological Administration (CMA); Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province; Key Open Laboratory of Arid Climatic Change and Disaster Reduction of CMA, Institute of Arid Meteorology
2Meteorological Bureau of Gansu
3Beijing Meteorological Bureau
4College of Atmospheric Sciences, Lanzhou University
刊名: Chinese Science Bulletin, 2012, Vol.57 (13), pp.1559-1567
来源数据库: Springer Journal
DOI: 10.1007/s11434-012-5000-y
关键词: underlying vegetation surfacewindflow conditionsaerodynamic roughness lengthinteractionparameterization
英文摘要: Abstract(#br)Surface aerodynamic roughness length is usually taken as a constant. In fact, it displays a remarkable dynamic change over underlying vegetation surfaces, because of the coupling of land surface roughness elements and windflow conditions. Current international research on this dynamic change and associated mechanisms is very limited. Using observations from different underlying surfaces (including forest, farmland and grassland) provided by a northern China coordinated observation test, the variation of aerodynamic roughness length, along with wind speed and friction velocity, is analyzed. We introduce two relationship fits, between aerodynamic roughness length and wind speed u , and dynamic variable u 2 / u *. Results show that aerodynamic roughness length has a clear...
全文获取路径: Springer  (合作)
影响因子:1.319 (2012)

  • roughness 粗糙度
  • length 距离
  • aerodynamic 气体动力的
  • vegetation 植被
  • conditions 条件式
  • surface 
  • over 在上方