Observation of wind shear during evening transition and an estimation of submicron aerosol concentrations in Beijing using a Doppler wind lidar

2017 ◽  
Vol 31 (2) ◽  
pp. 350-362 ◽  
Author(s):  
Yong Chen ◽  
Junling An ◽  
Xiquan Wang ◽  
Yele Sun ◽  
Zifa Wang ◽  
...  
Keyword(s):  
Wind Shear ◽  
Evening Transition ◽  
Submicron Aerosol ◽  
Wind Lidar ◽  
Doppler Wind Lidar

scholarly journals Impact of Lidar Data Assimilation on Low-Level Wind Shear Simulation at Lanzhou Zhongchuan International Airport, China: A Case Study

Atmosphere ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1342
Author(s):  
Lanqian Li ◽  
Ningjing Xie ◽  
Longyan Fu ◽  
Kaijun Zhang ◽  
Aimei Shao ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Wind Shear ◽  
Three Dimensional ◽  
Wrf Model ◽  
Lidar Data ◽  
Positive Role ◽  
Low Level ◽  
Wind Lidar ◽  
The Impact ◽  
Doppler Wind Lidar

Doppler wind lidar has played an important role in alerting low-level wind shear (LLW). However, these high-resolution observations are underused in the model-based analysis and forecasting of LLW. In this regard, we employed the Weather Research and Forecasting (WRF) model and its three-dimensional variational (3D-VAR) system to investigate the impact of lidar data assimilation (DA) on LLW simulations. Eight experiments (including six assimilation experiments) were designed for an LLW process as reported by pilots, in which different assimilation intervals, assimilation timespans, and model vertical resolutions were examined. Verified against observations from Doppler wind lidar and an automated weather observing system (AWOS), the introduction of lidar data is helpful for describing the LLW event, which can represent the temporal and spatial features of LLW, whereas experiments without lidar DA have no ability to capture LLW. While lidar DA has an obviously positive role in simulating LLW in the 10–20 min after the assimilation time, this advantage cannot be maintained over a longer time. Therefore, a smaller assimilation interval is favorable for improving the simulated effect of LLW. In addition, increasing the vertical resolution does not evidently improve the experimental results, either with or without assimilation.

scholarly journals Observation of nocturnal low-level wind shear and particulate matter in urban Beijing using a Doppler wind lidar

2017 ◽  
Vol 10 (6) ◽  
pp. 411-417 ◽  
Author(s):  
Yong Chen ◽  
Jun-Ling An ◽  
Jian Lin ◽  
Ye-Le Sun ◽  
Xi-Quan Wang ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Wind Shear ◽  
Low Level ◽  
Wind Lidar ◽  
Doppler Wind Lidar

scholarly journals Wind shear over the Nice Côte d'Azur airport: case studies

2013 ◽  
Vol 13 (9) ◽  
pp. 2223-2238 ◽  
Author(s):  
A. Boilley ◽  
J.-F. Mahfouf
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Numerical Simulations ◽  
Wind Shear ◽  
Horizontal Wind ◽  
Wind Profiler ◽  
Measurement Campaign ◽  
Wind Lidar ◽  
Real Time Applications ◽  
Wind Shears

Abstract. The Nice Côte d'Azur international airport is subject to horizontal low-level wind shears. Detecting and predicting these hazards is a major concern for aircraft security. A measurement campaign took place over the Nice airport in 2009 including 4 anemometers, 1 wind lidar and 1 wind profiler. Two wind shear events were observed during this measurement campaign. Numerical simulations were carried out with Meso-NH in a configuration compatible with near-real time applications to determine the ability of the numerical model to predict these events and to study the meteorological situations generating an horizontal wind shear. A comparison between numerical simulation and the observation dataset is conducted in this paper.

Eye-safe, single-frequency pulsed all-fiber laser for Doppler wind lidar

2011 ◽  
Vol 9 (9) ◽  
pp. 090604-90607 ◽  
Author(s):  
刘源 Yuan Liu ◽  
刘继桥 Jiqiao Liu ◽  
陈卫标 Weibiao Chen
Keyword(s):  
Fiber Laser ◽  
Single Frequency ◽  
Wind Lidar ◽  
Doppler Wind Lidar

scholarly journals Dust Transport Across the Atlantic Studied by Airborne Doppler Wind Lidar During the Saltrace Experiment in 2013

2016 ◽  
Vol 119 ◽  
pp. 18008
Author(s):  
Fernando Chouza ◽  
Oliver Reitebuch ◽  
Stephan Rahm ◽  
Bernadett Weinzierl
Keyword(s):  
Dust Transport ◽  
Wind Lidar ◽  
Doppler Wind Lidar

Analysis of Detectors and Transmission Curve Correction of Mobile Rayleigh Doppler Wind Lidar

2010 ◽  
Vol 27 (11) ◽  
pp. 114207 ◽  
Author(s):  
Tang Lei ◽  
Wang Yong-Tao ◽  
Shu Zhi-Feng ◽  
Dong Ji-Hui ◽  
Wang Guo-Cheng ◽  
...  
Keyword(s):  
Transmission Curve ◽  
Curve Correction ◽  
Wind Lidar ◽  
Doppler Wind Lidar
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