Wind field monitoring performance analysis of all-fiber coherent wind Lidar in coastal regions

2018 ◽  
Author(s):  
Fengli Tian ◽  
Fan Qi ◽  
ZhouDing Fu ◽  
Jiafeng Zheng ◽  
Keyun Zhu ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Wind Field ◽  
Field Monitoring ◽  
Coastal Regions ◽  
Wind Lidar ◽  
Monitoring Performance

Performance Improvement of Rayleigh Wind Lidar and Wind Field Observation in Middle and Upper Atmosphere

2016 ◽  
Vol 43 (7) ◽  
pp. 0710004
Author(s):  
唐磊 Tang Lei ◽  
蒋杉 Jiang Shan ◽  
李梓霂 Li Zimu ◽  
郑俊 Zheng Jun ◽  
赵若灿 Zhao Ruocan ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Field Observation ◽  
Wind Field ◽  
Upper Atmosphere ◽  
Wind Lidar

Detection Performance Analysis of All-Fiber Coherent Wind Lidar Under Different Weather Types

2017 ◽  
Vol 44 (2) ◽  
pp. 0210003
Author(s):  
范 琪 Fan Qi ◽  
朱克云 Zhu Keyun ◽  
郑佳锋 Zheng Jiafeng ◽  
张 杰 Zhang Jie ◽  
周鼎富 Zhou Dingfu ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Detection Performance ◽  
Weather Types ◽  
Wind Lidar

scholarly journals Estimation of tropical cyclone wind hazards in coastal regions of China

2020 ◽  
Vol 20 (6) ◽  
pp. 1617-1637 ◽  
Author(s):  
Genshen Fang ◽  
Lin Zhao ◽  
Shuyang Cao ◽  
Ledong Zhu ◽  
Yaojun Ge
Keyword(s):  
Wind Field ◽  
Radial Pressure ◽  
Disaster Mitigation ◽  
Japan Meteorological Agency ◽  
Coastal Regions ◽  
Distribution Models ◽  
Time Step ◽  
Translation Speed ◽  
Wind Hazards ◽  
Hazard Curves

Abstract. Coastal regions of China feature high population densities as well as wind-sensitive structures and are therefore vulnerable to tropical cyclones (TCs) with approximately six to eight landfalls annually. This study predicts TC wind hazard curves in terms of design wind speed versus return periods for major coastal cities of China to facilitate TC-wind-resistant design and disaster mitigation as well as insurance-related risk assessment. The 10 min wind information provided by the Japan Meteorological Agency (JMA) from 1977 to 2015 is employed to rebuild TC wind field parameters (radius of maximum winds Rmax,s and shape parameter of radial pressure profile Bs) at surface level using a height-resolving boundary layer model. These parameters will be documented to develop an improved JMA dataset. The probabilistic behaviors of historical tracks and wind field parameters at the first time step within a 500 km radius subregion centered at a site of interest are examined to determine preferable probability distribution models before stochastically generating correlated genesis parameters utilizing the Cholesky decomposition method. Recursive models are applied for translation speed, Rmax,s and Bs during the TC track and wind field simulations. Site-specific TC wind hazards are studied using 10 000-year Monte Carlo simulations and compared with code suggestions as well as other studies. The resulting estimated wind speeds for northern cities (Ningbo and Wenzhou) under a TC climate are higher than code recommendations, while those for southern cities (Zhanjiang and Haikou) are lower. Other cities show a satisfactory agreement with code provisions at the height of 10 m. Some potential reasons for these findings are discussed to emphasize the importance of independently developing hazard curves of TC winds.

scholarly journals Wide Area Wind Field Monitoring Status & Results

2011 ◽  
Author(s):  
Alan Marchant ◽  
Jed Simmons
Keyword(s):  
Wind Field ◽  
Field Monitoring ◽  
Wide Area

scholarly journals A Case Study of Offshore Advection of Boundary Layer Rolls over a Stably Stratified Sea Surface

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Nina Svensson ◽  
Erik Sahlée ◽  
Hans Bergström ◽  
Erik Nilsson ◽  
Merete Badger ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Land Surface ◽  
Wind Field ◽  
Vertical Component ◽  
Wrf Model ◽  
Horizontal Wind ◽  
Coastal Regions ◽  
Sar Images ◽  
Streaky Structures ◽  
The Baltic

Streaky structures of narrow (8-9 km) high wind belts have been observed from SAR images above the Baltic Sea during stably stratified conditions with offshore winds from the southern parts of Sweden. Case studies using the WRF model and in situ aircraft observations indicate that the streaks originate from boundary layer rolls generated over the convective air above Swedish mainland, also supported by visual satellite images showing the typical signature cloud streets. The simulations indicate that the rolls are advected and maintained at least 30–80 km off the coast, in agreement with the streaks observed by the SAR images. During evening when the convective conditions over land diminish, the streaky structures over the sea are still seen in the horizontal wind field; however, the vertical component is close to zero. Thus advected feature from a land surface can affect the wind field considerably for long times and over large areas in coastal regions. Although boundary layer rolls are a well-studied feature, no previous study has presented results concerning their persistence during situations with advection to a strongly stratified boundary layer. Such conditions are commonly encountered during spring in coastal regions at high latitudes.

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