Role of surface and boundary layer processes in the temporal evolution of Monsoon Low Level Jet (MLLJ) observed from high resolution Doppler wind lidar measurements

2014 ◽  
Vol 121 ◽  
pp. 1-9 ◽  
Author(s):  
R.D. Ruchith ◽  
P. Ernest Raj ◽  
M.C.R. Kalapureddy ◽  
T. Dharmaraj
Keyword(s):  
Boundary Layer ◽  
High Resolution ◽  
Temporal Evolution ◽  
Low Level ◽  
Boundary Layer Processes ◽  
Lidar Measurements ◽  
Wind Lidar ◽  
Low Level Jet ◽  
Doppler Wind Lidar

scholarly journals The Simulation of the Southern Great Plains Nocturnal Boundary Layer and the Low-Level Jet with a High-Resolution Mesoscale Atmospheric Model

2011 ◽  
Vol 50 (7) ◽  
pp. 1497-1513 ◽  
Author(s):  
David Werth ◽  
Robert Kurzeja ◽  
Nelson Luís Dias ◽  
Gengsheng Zhang ◽  
Henrique Duarte ◽  
...  
Keyword(s):  
Boundary Layer ◽  
High Resolution ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Nocturnal Boundary Layer ◽  
Atmospheric Modeling ◽  
Synoptic Situation ◽  
Test Bed ◽  
Low Level ◽  
Low Level Jet

AbstractA field project over the Atmospheric Radiation Measurement–Cloud and Radiation Test Bed (ARM–CART) site during a period of several nights in September 2007 was conducted to explore the evolution of the low-level jet (LLJ). Data were collected from in situ (a multilevel tower) and remote (sodar) sensors, and the observed LLJ activity during the project was found to agree well with data from earlier studies regarding jet speed, height, and direction. To study nocturnal boundary layer (NBL) behavior, the Regional Atmospheric Modeling System was used to simulate the ARM–CART NBL field experiment and was validated against the data collected from the site. This model was run at high resolution for calculating the interactions among the various motions within the boundary layer and their influence on the surface. The model faithfully simulated the formation and dissolution of the low-level nocturnal jet during a synoptic situation in which low pressure with warm southerly advection replaced high pressure. An additional simulation at 32.5-m resolution was performed for the most stable 5.5-h period, using a turbulence scheme adjusted to allow for greater resolved turbulent kinetic energy, and the model reproduced the turbulence statistics as determined by a power spectrum. The benefit of the high-resolution simulation is evident in the much more realistically resolved model turbulent kinetic energy and the fluxes of momentum, heat, and water vapor.

Role of low-level jets and boundary-layer properties on the NBL budget technique

2005 ◽  
Vol 135 (1-4) ◽  
pp. 35-43 ◽  
Author(s):  
N. Mathieu ◽  
I.B. Strachan ◽  
M.Y. Leclerc ◽  
A. Karipot ◽  
E. Pattey
Keyword(s):  
Boundary Layer ◽  
Low Level ◽  
Low Level Jets
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