Abstract. Kelvin-Helmholtz billows (KHB) have been investigated in the Atmospheric Boundary layer (ABL) using Mono-static SODAR (Sound Detection And Ranging) designed and developed by CSIR-National Physical Laboratory, New Delhi over the capital region Delhi of India. KH billows are a primary cause of mixing in stably stratified conditions and hence have been studied widely by researchers by using ground-based and remote sensing methods. About ninety cases of KHBs observed in SODAR echograms from March 2019 to November 2019 in the ABL. Trains of K-H billows lasting from thirty minutes to various minutes were frequently detected in the lower portion of the troposphere (ABL), creating in a statically stable ABL. Most recognised billows are round the resolution limit of SODAR. Additionally, several of the cases contain billows with extremely varied amplitudes and shapes. The most significant number of episodes observed in the October months were related with the morning growth of the inversion.

中文翻译：

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使用SODAR检测印度国家首都地区的开尔文-海姆霍兹巨浪

摘要。开尔文-亥姆霍兹巨浪（KHB）已在大气边界层（ABL）中使用由CSIR国家物理实验室设计和开发的单静态SODAR（声音探测和测距）在印度首都德里进行了研究。KH滚滚是在稳定分层条件下混合的主要原因，因此，研究人员已通过使用地面和遥感方法对其进行了广泛研究。从2019年3月至2019年11月在ABL的SODAR回波图中观察到大约90例KHBs。在对流层（ABL）的下部经常检测到持续30分钟到不同分钟的KH滚滚火车，形成了静态稳定的ABL。大多数公认的涛涛都围绕SODAR的分辨率极限。另外，有几种情况包含波涛，波涛的幅度和形状各不相同。在十月份中观察到的最重要的事件数与反演的早晨增长有关。