Preprints
https://doi.org/10.5194/angeo-2020-91
https://doi.org/10.5194/angeo-2020-91

  13 Jan 2021

13 Jan 2021

Review status: this preprint was under review for the journal ANGEO but the revision was not accepted.

Detection of Kelvin-Helmholtz billows over the National Capital Region of India using SODAR

Nishant Kumar1, Kirti Soni2, and Ravinder Agarwal1 Nishant Kumar et al.
  • 1Thapar Institute of Engineering and Technology, Patiala
  • 2CSIR-National Physical Laboratory, New Delhi, (India)

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.

Nishant Kumar et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2020-91', Anonymous Referee #1, 14 Feb 2021
  • RC2: 'Comment on angeo-2020-91', Anonymous Referee #2, 30 Mar 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2020-91', Anonymous Referee #1, 14 Feb 2021
  • RC2: 'Comment on angeo-2020-91', Anonymous Referee #2, 30 Mar 2021

Nishant Kumar et al.

Nishant Kumar et al.

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Short summary
Kelvin-Helmholtz billows (KHB) have been investigated in the Atmospheric Boundary layer (ABL) using Mono-static SODAR (Sound Detection And Ranging) first time over the capital region Delhi of India. About ninety cases of KHBs observed in SODAR echograms from March 2019 to November 2019 in the ABL. 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.