Statistics of Turbulence in the Stable Boundary Layer Affected by Gravity Waves
Statistics of Turbulence in the Stable Boundary Layer Affected by Gravity Waves
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DOI：
10.1007/s10546-013-9809-y
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发表时间：
2013-03
影响因子：
4.3
通讯作者：
Z. Sorbjan;A. Czerwińska
中科院分区：
文献类型：
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作者：
Z. Sorbjan;A. Czerwińska
为了研究湍流和重力波之间的相互作用在稳定的边界层相似性理论的关系，我们重新检查了一个数据集，收集在1978年4月的三个晚上，并在1980年的300米塔的博尔德大气观测站（BAO）。位于美国科罗拉多州伊利、落基山脉山麓以东30公里处的BAO站点，一直以频繁探测到海浪活动而闻名。考虑的配置文件的湍流通量和方差进行归一化的两个本地的，基于梯度的缩放系统，随后与相似函数的理查森数，获得的数据没有重力流和地形因素的影响的基础上进行比较。第一个标度系统是基于垂直速度方差和Brunt-Väisäla频率的局部值，而第二个是基于温度方差和分析显示出一些偏离相似函数（获得的数据几乎没有中尺度运动的影响）;尽管如此，无量纲矩对Richardson数的总体依赖性得到了维持。
In order to investigate effects of interactions between turbulence and gravity waves in the stable boundary layer on similarity theory relationships, we re-examined a dataset, collected during three April nights in 1978 and in 1980 on the 300-m tower of the Boulder Atmospheric Observatory (BAO). The BAO site, located in Erie, Colorado, USA, 30 km east of the foothills of the Rocky Mountains, has been known for the frequent detection of wave activities. The considered profiles of turbulent fluxes and variances were normalized by two local, gradient-based scaling systems, and subsequently compared with similarity functions of the Richardson number, obtained based on data with no influence of gravity currents and topographical factors. The first scaling system was based on local values of the vertical velocity varianceand the Brunt–Väisäla frequencywhile the second one was based on the temperature varianceandAnalysis showed some departures from the similarity functions (obtained for data with virtually no influence of mesoscale motions); nonetheless the overall dependency of dimensionless moments on the Richardson number was maintained.