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
Impact of satellite rainfall assimilation on Weather Research and Forecasting model predictions over the Indian region
TL;DR: In this article, the authors used the Weather Research and Forecasting (WRF) model and its four-dimensional variational data assimilation system to assimilate the Tropical Rainfall Measuring Mission 3B42 and Japan Aerospace Exploration Agency Global Satellite Mapping of Precipitation retrieved rainfall.
Journal ArticleDOI
Estimating the Depth of the Daytime Convective Boundary Layer
J. C. Kaimal,N. L. Abshire,R. B. Chadwick,M. T. Decker,William H. Hooke,Robert A. Kropfli,William Neff,F. Pasqualucci,Peter H. Hildebrand +8 more
TL;DR: In this paper, three in-situ and five remote sensing techniques for measuring the height of the daytime convective boundary layer were compared, and good agreement between the different systems when the capping inversion was steep and well defined, and some variability when the stratification was not so sharply defined.
Journal ArticleDOI
Indo‐Asian pollution during INDOEX: Microphysical particle properties and single‐scattering albedo inferred from multiwavelength lidar observations
TL;DR: In this paper, the authors presented a comprehensive data set of vertically resolved physical particle properties, and the single-scattering albedo at 532 nm, derived from multi-wavelength lidar observations of pollution plumes advected from India and Southeast Asia out over the tropical Indian Ocean during the northeast monsoon.
Journal ArticleDOI
Vertical distribution of aerosols over an urban continental site in India inferred using a micro pulse lidar
TL;DR: In this paper, the vertical distribution of aerosols over a continental, urban location, Bangalore in southern India, using a micro pulse lidar (MPL) operated for about two years (2004 and 2005), was examined.
Journal ArticleDOI
Performance evaluation of the boundary-layer height from lidar and the weather research and forecasting model at an urban coastal site in the North-East Iberian Peninsula
TL;DR: In this paper, the authors evaluate planetary boundary layer (PBL) parametrizations in the Weather Research and Forecasting (WRF) numerical model, with three connected objectives: first, for a 16-year period, they use a cluster analysis algorithm of three-day back-trajectories to determine general synoptic flow patterns over Barcelona, Spain arriving at heights of 0.5, 1.5 and 3 km.
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