Results 21 to 30 of about 2,216,341 (286)

Momentum flux associated with gravity waves in the low-latitude troposphere [PDF]

Annales Geophysicae, 2003
The vertical fluxes of horizontal momentum at tropospheric heights are calculated for four days, 25–28 August 1999. The mean zonal wind during these days show the presence of strong westward wind at the upper troposphere.
S. R. Prabhakaran Nayar, S. Sreeletha
doaj   +1 more source

Vertical wind shear on Jupiter from Cassini images [PDF]

Journal of Geophysical Research: Planets, 2006
Multifilter images of Jupiter acquired by the Cassini Imaging Science Subsystem (ISS) are used to derive zonal winds at altitudes above and below the visible cloud deck. Small features unique to the ultraviolet images of ISS are tracked to get the systematic high‐altitude zonal winds.
Li, Liming, Ingersoll, Andrew P., Vasavada, Ashwin R., Simon-Miller, Amy A., Del Genio, Anthony D., Ewald, Shawn P., Porco, Carolyn C., West, Robert A.   +7 more
openaire   +2 more sources

Tropical Cyclone Intensity in Vertical Wind Shear

Journal 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

Nanjing 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

Windshear Identification Algorithms by Doppler Pulse Lidar [PDF]

ITM 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

Estimation of wind misalignment and vertical shear from blade loads

Renewable Energy, 2014
Abstract This paper describes the formulation and verification of a novel observer of wind parameters. The general idea behind the proposed approach is to consider the wind turbine rotor as an anemometer. In fact, the rotor responds to varying wind conditions; by properly interpreting this response, one can indirectly measure some desired wind ...
BOTTASSO, CARLO LUIGI, RIBOLDI, CARLO
openaire   +2 more sources

Uncertainty in vertical extrapolation of measured wind speed via shear

, 2019
This report provides formulations for estimation of uncertainties involved in vertical extrapolation of winds, as well as the total uncertainty incurred when winds observed at one height are extrapolated to turbine hub height for wind resource assessment.
Hernández Fillols, Francisco, Kelly, Mark, Kersting, Gibson, Clark, Steve, Mazoyer, Paul, Matos, José Carlos, Yang, Changfeng   +6 more
core   +1 more source

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

Journal 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

Evidence of gravity wave contribution to vertical shear and mixing in the lower stratosphere [PDF]

Atmospheric Chemistry and Physics
Small-scale dynamics, particularly gravity waves (GWs), modify vertical wind shear and can trigger turbulence in the lowermost stratosphere (LMS), thereby influencing the transport of trace species across the tropopause.
M. Umbarkar, D. Kunkel, A. Miltenberger, H.-C. Lachnitt, T. Kaluza, C. Schwenk, P. Hoor   +6 more
doaj   +1 more source

Vertical Shear Instability and Photoevaporative Winds

, 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