Results 21 to 30 of about 5,548 (262)

Windshear Identification Algorithms by Doppler Pulse Lidar [PDF]

open access: yesITM Web of Conferences, 2019
Doppler pulse lidars are increasingly common as a tool for monitoring hazardous wind phenomena. Possible applications include measurements of wake vortices behind aircraft, detection of vertical and horizontal wind shear, detection of gust fronts, and ...
Baranov Nikolay, Lemishchenko Ekaterina
doaj   +1 more source

Tropical Cyclone Intensity in Vertical Wind Shear

open access: yesJournal of the Atmospheric Sciences, 2004
Abstract The structure and intensity changes of tropical cyclones (TCs) in environmental vertical wind shear (VWS) are investigated in this study using the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5).
Martin L. M. Wong, Johnny C. L. Chan
openaire   +1 more source

Influence of Low‑Level Wind Shear on Flight Characteristics of Large Helicopters

open access: yesNanjing Hangkong Hangtian Daxue Xuebao
To analyze the influence of low-level wind shear on the flight characteristics of a large helicopter during takeoff, a wind shear model and a helicopter flight dynamics model coupled with wind interference are established.
YE Yi, CHEN Renliang, WEI Yuan
doaj   +1 more source

Quarterdiurnal signature in sporadic E occurrence rates and comparison with neutral wind shear [PDF]

open access: yesAnnales Geophysicae, 2019
The GPS radio occultation (RO) technique is used to study sporadic E (Es) layer plasma irregularities of the Earth's ionosphere on a global scale using GPS signal-to-noise ratio (SNR) profiles from the COSMIC/FORMOSAT-3 satellite.
C. Jacobi   +3 more
doaj   +1 more source

Influence of radiation diurnal variation on the rapid intensification process of super Typhoon Rammasun (1409) in the South China Sea

open access: yesFrontiers in Earth Science, 2022
In this study, a sensitivity experiment based on a numerical model is conducted to study the influence of the diurnal variation of radiation on the rapid intensification process of Super Typhoon Rammasun (1409) in the South China Sea.
Xinghai Zhang   +4 more
doaj   +1 more source

Time scales of dynamic stall development on a vertical-axis wind turbine blade

open access: yesFlow, 2023
Vertical-axis wind turbines are excellent candidates to diversify wind energy technology, but their aerodynamic complexity limits industrial deployment.
Sébastien Le Fouest   +2 more
doaj   +1 more source

Coupling with ocean mixed layer leads to intraseasonal variability in tropical deep convection: Evidence from cloud‐resolving simulations

open access: yesJournal of Advances in Modeling Earth Systems, 2017
The effect of coupling a slab ocean mixed layer to atmospheric convection is examined in cloud‐resolving model (CRM) simulations in vertically sheared and unsheared environments without Coriolis force, with the large‐scale circulation parameterized using
Usama Anber, Shuguang Wang, Adam Sobel
doaj   +1 more source

Observation of Turbulent Mixing Characteristics in the Typical Daytime Cloud-Topped Boundary Layer over Hong Kong in 2019

open access: yesRemote Sensing, 2020
Turbulent mixing is critical in affecting urban climate and air pollution. Nevertheless, our understanding of it, especially in a cloud-topped boundary layer (CTBL), remains limited. High-temporal resolution observations provide sufficient information of
Tao Huang   +6 more
doaj   +1 more source

Vertical Shear Instability and Photoevaporative Winds

open access: yes, 2020
In recent years hydrodynamical (HD) models have become important to describe the gas kinematics in protoplanetary disks, especially in combination with models of photoevaporation and/or magnetically driven winds. Our aim is to investigate how vertical shear instability (VSI) could influence the thermally driven winds on the surface of protoplanetary ...
openaire   +2 more sources

Study on Characteristics and Numerical Simulation of a Convective Low-Level Wind Shear Event at Xining Airport

open access: yesAtmosphere
Low-level wind shear (LLWS) is a critical issue in aviation meteorology, posing serious risks to flight safety—especially at plateau airports with high elevation and complex terrain. This study investigates a convective wind shear event at Xining Airport
Juan Gu   +5 more
doaj   +1 more source

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