Experimental Studies of Turbulence in the Surface Layer: Phase III

这项研究的目的是评估低层大气湍流动能收支方程中与稳定性有关的项。理论给出了这一重要关系的形式，但所涉及的各种机制的贡献必须通过实验来评估。以前的评估，其中许多是20多年前获得的，现在被认为是不确定的。该项目将使用改进的设备，并将与澳大利亚堪培拉CSIRO环境力学中心的科学家合作，在新南威尔士州一片广袤、没有树木的平原上对前16米的湍流预算进行全面研究。观测将在广泛的大气稳定度范围内进行，包括同时测量平均风廓线、湍流谱、净辐射、气温和露点的垂直梯度、土壤-空气界面的热交换率以及湍流能量、动量和热量的垂直湍流通量。

The object of this research is an evaluation of the stability-dependent terms of the equation for the budget of turbulent kinetic energy in the lower atmosphere. Theory gives the form of this important relation, but the contributions made by various mechanisms involved must be evaluated by experiment. Previous evaluations, many obtained more than 20 years ago, are now considered uncertain. This project will use improved equipment and will work jointly with scientists from the CSIRO Centre for Environmental Mechanics, Canberra, Australia, to carry out a complete study of the turbulence budget in the first 16 m over an extensive, treeless plain in New South Wales. Observations will be made over a wide range of atmospheric stability and will include simultaneous measurements of mean wind profiles, turbulence spectra, net radiation, vertical gradients of air temperature and dew point, rates of thermal exchange across the soil-air interface, and the vertical turbulent fluxes of turbulent energy, momentum, and heat.