Journal ArticleDOI
Comparison of mixing layer heights determined using LiDAR, radiosonde, and numerical weather prediction model at a rural site in southern India
R. Vishnu,Y. Bhavani Kumar,P. R. Sinha,T. Narayana Rao,E. James Jebaseelan Samuel,Pratima Kumar +5 more
TLDR
In this paper, the authors used ground-based elastic backscatter LiDAR (EBL) profiles for the determination of mixing layer height (MLH) and compared it with concurrent radiosonde (RS) observations [MLH (RS)] and numerical models.Abstract:
There is no agreed reference method for accurately determination of mixing layer height (MLH) in the existing literature. In part, this is due to different definitions of the atmospheric boundary layer exist, depending on the quantities and the physical processes invoked. In addition, MLH during late afternoon transition period is highly challenging to determine and perform model simulations because of the rapid variations in turbulent kinetic energy. For the first time, MLH has been determined at remote tropical site of Gadanki, India (13.45°N, 79.17°E, 360 masl) using ground-based elastic backscatter LiDAR (EBL). This article focuses on the late afternoon transition period and compares it with MLH obtained from the EBL to concurrent radiosonde (RS) observations [MLH (RS)] and numerical models. Five different techniques have been applied to the EBL backscatter profiles for the determination of MLH. The mean of the five methods agreed to within 15% with the RS-derived MLH under various synoptic co...read more
Citations
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Numerical study of convection observed during the Winter Monsoon Experiment using a mesoscale two-dimensional model [presentation]
TL;DR: In this article, a two-dimensional version of the Pennsylvania State University mesoscale model has been applied to Winter Monsoon Experiment data in order to simulate the diurnally occurring convection observed over the South China Sea.
Journal ArticleDOI
Summertime Urban Mixing Layer Height over Sofia, Bulgaria
TL;DR: In this paper, a comparison between proprietary (Jenoptik) and freely available (STRAT) algorithms to retrieve MLH diurnal cycle over an urban area was conducted in the summer season when MLH is above the full overlapping height of the ceilometer in order to minimize negative impact of the biaxial LiDAR's drawback.
Journal ArticleDOI
An Investigation of the Elevated Aerosol Layer Using a Polarization Lidar Over a Tropical Rural Site in India
TL;DR: Polarization lidar observations were made to study the transport of an elevated aerosol layer over Gadanki, India (13.45° N, 79.17° E) during the pre-monsoon period of the year 2009 as mentioned in this paper.
Journal ArticleDOI
The impact of improved air-quality due to COVID-19 lockdown on surface meteorological parameters and planetary boundary layer over Gadanki, a tropical rural site in India
TL;DR: In this paper, the authors focused on the changes in the vertical structure of aerosol concentration and how those changes impacted radiation balance, the planetary boundary layer (PBL) height and surface meteorological parameters.
References
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Journal ArticleDOI
Urban boundary-layer height determination from lidar measurements over the paris area.
TL;DR: This work presents methods suited for precise determination of the ABL structure's temporal evolution in a dynamic environment as complex as the Paris area and compares commonly used methods that permit ABL height retrievals from backscatter lidar signals under different meteorological conditions.
Journal ArticleDOI
The production, concentration, and vertical distribution of the sea‐salt aerosol*
TL;DR: A brief review of what is known about atmospheric sea salt, its origin and concentration, and a medium to present new data on its vertical distribution is presented in this paper. But no attempt is made to discuss the influence of the continents on the salt aerosol.
Journal ArticleDOI
Boundary Layer Height and Entrainment Zone Thickness Measured by Lidars and Wind-Profiling Radars
TL;DR: In this article, the authors examined measurements of boundary layer height and entrainment zone thickness observed with two lidars and with a radar wind profiler during the Flatland96 Lidars in Flat Terrain experiment.
Journal ArticleDOI
Finding Boundary Layer Top: Application of a Wavelet Covariance Transform to Lidar Backscatter Profiles
TL;DR: In this article, the Haar wavelet covariance transform was used to detect the boundary layer top from lidar backscatter profiles by locating the maximum in the covariance profiles.
Journal ArticleDOI
Continuous monitoring of the boundary-layer top with lidar
TL;DR: In this paper, the results of measurements taken with a compact, automated Raman lidar over a one-year period (February 2006 to January 2007) are presented, which demonstrate that BL top monitoring with lidar throughout the year is possible, and present the required data analysis method that permits an automated, robust retrieval of BL top at all weather situations.
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