The simultaneous observations from a Doppler weather radar and an instrumented micrometeorological tower, offer an opportunity to dissect the effects of a gust front on the surface layer turbulence in a tropical convective boundary layer. We present a case study where a sudden drop in temperature was noted at heights within the surface layer during the passage of a gust front in the afternoon time. Consequently, this temperature drop created an interface which separated two different turbulent regimes. In one regime the turbulent temperature fluctuations were large and energetic, whereas in the other regime they were weak and quiescent. Given its uniqueness, we investigated the size distribution and aggregation properties of the turbulent structures related to these two regimes. We found that, the size distributions of the turbulent structures for both of these regimes displayed a clear power-law signature. Since power-laws are synonymous with scale-invariance, this indicated the passing of the gust front initiated a scale-free response which governed the turbulent characteristics of the temperature fluctuations. We propose a hypothesis to link such behaviour with the self-organized criticality as observed in the complex systems. However, the temporal organization of the turbulent structures, as indicated by their clustering tendencies, differed between these two regimes. For the regime corresponding to large temperature fluctuations, the turbulent structures were significantly clustered, whose clustering properties changed with height. Contrarily, for the other regime where the temperature fluctuations were weak, the turbulent structures remained less clustered with no discernible change being observed with height.

来自多普勒天气雷达和仪器化微气象塔的同时观测，为剖析阵风锋对热带对流边界层表层湍流的影响提供了机会。我们提供了一个案例研究，其中在午后阵风阵风过后，在表层的高度发现温度突然下降。因此，该温度下降产生了一个界面，该界面将两个不同的湍流区分开。在一种情况下，湍流的温度波动较大且充满活力，而在另一种情况下，则较弱且静止。鉴于其独特性，我们研究了与这两种状态有关的湍流结构的尺寸分布和聚集特性。我们发现 这两种情况下湍流结构的尺寸分布都显示出清晰的幂律特征。由于幂律是尺度不变性的同义词，这表明阵风锋的过去引发了无尺度响应，从而控制了温度波动的湍流特性。我们提出了一个假设，将这种行为与在复杂系统中观察到的自组织临界联系起来。然而，湍流结构的时间组织，如其聚集趋势所表明的，在这两种情况之间是不同的。对于与大的温度波动相对应的状态，湍流结构显着聚集，其聚集特性随高度而变化。相反，对于其他温度波动较小的区域，