Results 31 to 40 of about 1,384,792 (296)

Comparison of surface wind speed and wind speed profiles in the Taklimakan Desert [PDF]

PeerJ, 2022
Near-surface (10 m) wind speed (NWS) plays a crucial role in many areas, including the hydrological cycle, wind energy production, and the dispersion of air pollution.
Xinchun Liu, Yongde Kang, Hongna Chen, Hui Lu   +3 more
doaj   +2 more sources

A neutral wind instrument for nano-satellite platforms

Review of Scientific Instruments, 2018
Here we describe the first neutral wind sensor developed specifically for use on resource limited nano-satellite platforms. The instrument is a next generation redesign of the ram wind sensor flown on the Communications/Navigation Outage Forecasting System satellite for measurements of neutral velocity, temperature, and composition.
L. J. Kordella, G. D. Earle, G. Roth, S. Noel, R. V. Robertson, R. L. Davidson, C. E. Holland, V. Garg   +7 more
openaire   +4 more sources

Coherence of Turbulent Wind Under Neutral Wind Conditions at FINO1

Energy Procedia, 2016
AbstractCurrent wind turbine design standards allow for two different approaches to model the wind field used for engineering estimates; The Mann turbulence model and the Kaimal wind spectra combined with a coherence function. The point wind spectra generated, using the recommended parameters, are similar, but there are differences in the spatial ...
Eliassen, Lene, Obhrai, Charlotte
openaire   +1 more source

Characterization of F-region neutral wind response times and its controlling factors during substorms

Frontiers in Astronomy and Space Sciences
Ion-neutral coupling is responsible for dissipating energy deposited into the high-latitude ionosphere during geomagnetically active periods. The neutral wind response time, or the ion-neutral coupling efficiency, is not well characterized, with a wide ...
Katherine Davidson, Ying Zou, Leslie Lamarche, Asti Bhatt, Mark Conde   +4 more
doaj   +1 more source

Kinetic Properties of the Neutral Solar Wind

The Astrophysical Journal, 2017
Abstract Charge-exchange collisions between the solar wind protons and interstellar hydrogen produce a distinctive population of neutral hydrogen streaming radially at nearly the solar-wind speed. This tenuous population, known as the neutral solar wind (NSW) is thought to play a key role in the appearance of the Interplanetary Boundary ...
V. Florinski, J. Heerikhuisen
openaire   +1 more source

First direct evidence of meso-scale variability on ion-neutral dynamics using co-located tristatic fpis and EISCAT radar in Northern Scandinavia [PDF]

, 2005
International audienceThis paper presents the first direct empirical evidence that mesoscale variations in ion velocities must be taken into consideration when calculating Joule heating and relating it to changes in ion temperatures and momentum transfer
Aylward, A. D., Ford, E. A. K., Aruliah, A. L., Pryse, S. E., C. J. Davis, Middleton, H. R., E. M. Griffin, H. R. Middleton, V. S. C. Howells, Howells, V. S. C., Kosch, M. J., M. J. Kosch, S. E. Pryse, A. L. Aruliah, E. A. K. Ford, Griffin, E. M., Jussila, J., J. Jussila, A. D. Aylward, Davis, C. J.   +19 more
core   +2 more sources

Gravity Waves and Wind-Farm Efficiency in Neutral and Stable Conditions [PDF]

Boundary-Layer Meteorology, 2017
We use large-eddy simulations (LES) to investigate the impact of stable stratification on gravity-wave excitation and energy extraction in a large wind farm. To this end, the development of an equilibrium conventionally neutral boundary layer into a stable boundary layer over a period of 8 h is considered, using two different cooling rates.
Allaerts, Dries, Meyers, Johan
openaire   +3 more sources

Spatial mapping of the thermospheric neutral wind field [PDF]

Planetary and Space Science, 1984
There are many possible observing strategies available for mapping the thermospheric wind field by using observations of the Doppler shift of the O (1D) airglow with a Fabry-Perot interferometer. The determination of the neutral wind field from observed line-of-sight velocities invariably involves some assumptions about the nature of the wind field.
Tepley, C. A., Burnside, R. G., Meriwether, Jr. , J. W., Hays, Paul B. (Paul Byron), Cogger, L. L.   +4 more
openaire   +2 more sources

Generation of the lower-thermospheric vertical wind estimated with the EISCAT KST radar at high latitudes during periods of moderate geomagnetic disturbance [PDF]

Annales Geophysicae, 2008
Lower-thermospheric winds at high latitudes during moderately-disturbed geomagnetic conditions were studied using data obtained with the European Incoherent Scatter (EISCAT) Kiruna-Sodankylä-Tromsø (KST) ultrahigh frequency (UHF) radar system on 9 ...
S. Oyama, S. Oyama, B. J. Watkins, S. Maeda, H. Shinagawa, S. Nozawa, Y. Ogawa, A. Brekke, C. Lathuillere, W. Kofman   +9 more
doaj   +1 more source

Multi‐Instrument Observations of Ion‐Neutral Coupling in the Dayside Cusp

Geophysical Research Letters, 2020
Using data from the Scanning Doppler Imager, the Super Dual Auroral Radar Network, the EISCAT Svalbard Radar, and an auroral all‐sky imager, we examine an instance of F region neutral winds which have been influenced by the presence of poleward moving ...
D. D. Billett, K. Hosokawa, A. Grocott, J. A. Wild, A. L. Aruliah, Y. Ogawa, S. Taguchi, M. Lester   +7 more
doaj   +1 more source