scholarly journals Gravity waves observation of wind field in stratosphere based on a Rayleigh Doppler lidar

2016 ◽  
Vol 24 (6) ◽  
pp. A581 ◽  
Author(s):  
Ruocan Zhao ◽  
Xiankang Dou ◽  
Dongsong Sun ◽  
Xianghui Xue ◽  
Jun Zheng ◽  
...  
Keyword(s):  
Gravity Waves ◽  
Wind Field ◽  
Doppler Lidar

scholarly journals Nocturnal Elevated Convection Initiation of the PECAN 4 July Hailstorm

2018 ◽  
Vol 146 (1) ◽  
pp. 243-262 ◽  
Author(s):  
J. W. Wilson ◽  
S. B. Trier ◽  
D. W. Reif ◽  
R. D. Roberts ◽  
T. M. Weckwerth
Keyword(s):  
Gravity Waves ◽  
University Of Wyoming ◽  
Cloud Base ◽  
Doppler Lidar ◽  
Convective Storms ◽  
Multiple Observations ◽  
Western Side ◽  
Convection Initiation ◽  
The University ◽  
Advance Knowledge

AbstractDuring the Plains Elevated Convection at Night (PECAN) experiment, an isolated hailstorm developed on the western side of the PECAN study area on the night of 3–4 July 2015. One of the objectives of PECAN was to advance knowledge of the processes and conditions leading to pristine nocturnal convection initiation (CI). This nocturnal hailstorm developed more than 160 km from any other convective storms and in the absence of any surface fronts or bores. The storm initiated within 110 km of the S-Pol radar; directly over a vertically pointing Doppler lidar; within 25 km of the University of Wyoming King Air flight track; within a network of nine sounding sites taking 2-hourly soundings; and near a mobile mesonet track. Importantly, even beyond 100 km in range, S-Pol observed the preconvection initiation cloud that was collocated with the satellite infrared cloud image and provided information on the evolution of cloud growth. The multiple observations of cloud base, thermodynamic stability, and direct updraft observations were used to determine that the updraft roots were elevated. Diagnostic analysis presented in the paper suggests that CI was aided by lower-tropospheric gravity waves occurring in an environment of weak but persistent mesoscale lifting.

Wind-Field Vector Retrieval Method at Low Signal-to-Noise Ratio for Coherent Doppler Lidar

2018 ◽  
Vol 45 (11) ◽  
pp. 1110005
Author(s):  
赵萌 Zhao Meng ◽  
郭磐 Guo Pan ◽  
芮训豹 Rui Xunbao ◽  
陈思颖 Chen Siying ◽  
张寅超 Zhang Yinchao ◽  
...  
Keyword(s):  
Wind Field ◽  
Signal To Noise Ratio ◽  
Field Vector ◽  
Doppler Lidar ◽  
Signal To Noise ◽  
Retrieval Method ◽  
Coherent Doppler Lidar ◽  
Noise Ratio ◽  
Vector Retrieval

Analysis of wind field measurement results of Doppler lidar

2012 ◽  
Vol 24 (9) ◽  
pp. 2037-2042
Author(s):  
唐磊 Tang Lei ◽  
董吉辉 Dong Jihui ◽  
吴海滨 Wu Haibin
Keyword(s):  
Field Measurement ◽  
Wind Field ◽  
Doppler Lidar ◽  
Measurement Results

Gravity waves measurement and analysis based on a Rayleigh Doppler lidar

2018 ◽  
Vol 47 (9) ◽  
pp. 930002
Author(s):  
陈 冲 Chen Chong ◽  
孙东松 Sun Dongsong ◽  
陈廷娣 Chen Tingdi ◽  
韩於利 Han Yuli ◽  
赵若灿 Zhao Ruocan ◽  
...  
Keyword(s):  
Gravity Waves ◽  
Doppler Lidar ◽  
Measurement And Analysis

Airborne Doppler Lidar Wind Field Measurements

1984 ◽  
Vol 65 (4) ◽  
pp. 348-359 ◽  
Author(s):  
J. Bilbro ◽  
G. Fichtl ◽  
D. Fitzjarrald ◽  
M. Krause ◽  
R. Lee
Keyword(s):  
Wind Field ◽  
Field Measurements ◽  
Doppler Lidar

scholarly journals Detection of Complex Terrain-Induced Wind Shear by Doppler Lidar at Beijing Capital International Airport

2020 ◽  
Vol 237 ◽  
pp. 06004
Author(s):  
Xiaoying Liu ◽  
Songhua Wu ◽  
Hongwei Zhang ◽  
Jianjun Zhang ◽  
Zhiqiang He ◽  
...  
Keyword(s):  
Wind Field ◽  
Complex Terrain ◽  
Wind Shear ◽  
Field Structure ◽  
Shielding Effect ◽  
Doppler Lidar ◽  
Wake Effect ◽  
International Airport ◽  
Glide Path ◽  
Coherent Doppler Lidar

In November 2018, the lidar-based wind shear synchronous experiment was performed at Beijing Capital International Airport (BCIA). In this experiment, aiming at the measurement of the terrain-induced wind shear and the wind field around the runway, the glide path scanning mode, and the RHI strategy were conducted alternately. Radial velocity retrieved from the glide path scanning can obviously present the wakes caused by complex terrain (e.g., hills, tall trees, residential and terminal buildings). The Pulse Coherent Doppler Lidar (PCDL) warned the terrain-induced wind shear, which was verified by the pilot report. The wind field structure around the runway under the wake effect and the building shielding effect is also analyzed.

Spiral Rainbands in a Numerical Simulation of Hurricane Bill (2009). Part II: Propagation of Inner Rainbands

2015 ◽  
Vol 72 (1) ◽  
pp. 191-215 ◽  
Author(s):  
Yumin Moon ◽  
David S. Nolan
Keyword(s):  
Numerical Simulation ◽  
Tropical Cyclone ◽  
Gravity Waves ◽  
Wind Field ◽  
Rossby Waves ◽  
Alternative Hypothesis ◽  
Convective Clouds ◽  
Squall Lines ◽  
Spiral Rainbands

Abstract This is the second part of a study that examines spiral rainbands in a numerical simulation of Hurricane Bill (2009). This paper evaluates whether the propagation of inner rainbands in the Hurricane Bill simulation is consistent with previously proposed hypotheses. Results indicate that the propagation of inner rainbands is not consistent with gravity waves, vortex Rossby waves, or squall lines. An alternative hypothesis is offered, arguing that inner rainbands are simply convective clouds that are advected by the rapidly rotating tropical cyclone wind field while being deformed into spiral shapes. A summary and a discussion of the results of both Parts I and II are provided.

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