Results 21 to 30 of about 1,384,792 (296)
The Astrophysical Journal, 1992 We present Arecibo 21 cm line observations of neutral winds associated with young stellar objects. We confirm the detection of fast neutral winds in HH 7-11 and in L1551. These two winds have been coarsely mapped along the CO outflow direction. For the case of HH 7-11, we find that the maximum velocity declines from 170 km s −1 at the center (SVS 13),
Carlo Giovanardi +4 more
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Atmosphere, 2023 The spatiotemporal variations and mechanisms of the ionospheric storms over the American sector during the August 2018 geomagnetic storm are investigated.
Changzhi Zhai +3 more
doaj +1 more source
Earth and Planetary Physics, 2021 Previous studies have proposed that both the thermospheric neutral wind and the equatorial electrojet (EEJ) near sunset play important roles in the pre-reversal enhancement (PRE) mechanism.
P. Abadi +7 more
doaj +1 more source
Oscillations in Neutral Winds Observed by GOCE
Geophysical Research Letters, 2020 AbstractThis study explores intra‐annual oscillations (IAOs) in upper thermospheric winds using GOCE cross‐track wind measurements between 70°S and 70°N. Due to the Sun‐synchronous dawn‐dusk orbit of GOCE, the cross‐contamination between seasonality and local time variations in winds is minimal, which makes it a unique space‐based data set to extract ...
Manbharat S. Dhadly +6 more
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Comparison between two VSC-HVDC transmission systems technologies : modular and neutral point clamped multilevel converter [PDF]
, 2009 The paper presents a detail comparison between two voltage source converter high voltage dc transmission systems, the first is based on neutral point-clamped (also known as HVDC-Light) and the second is based on innovative modular multilevel converter ...
Anaya-Lara, O. +5 more
core +3 more sources
Journal of Space Weather and Space Climate, 2017 A statistical study to determine the influence of geomagnetic disturbances on the ionosphere across the dawn terminator at subauroral and middle latitudes is performed, based on the vertical electron density profiles measured by the GPS Occultation ...
Tam Sunny W.Y. +2 more
doaj +1 more source
Supersonic neutral winds and neutral streams in the thermosphere‐ionosphere‐plasmasphere system [PDF]
Radio Science, 2009 Model studies were conducted to determine the conditions that might give rise to supersonic neutral winds in the high‐latitude thermosphere and that can produce neutral streams in the polar wind and plasmasphere. For the supersonic neutral wind study, we used a time‐dependent, three‐dimensional, global thermosphere‐ionosphere model.
L. C. Gardner, R. W. Schunk
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Formation of Neutral Disk-Like Zone Around the Active Hot Stars in Symbiotic Binaries
Open Astronomy, 2012 In this contribution we present the ionization structure in the enhanced wind from the hot star in symbiotic binaries during active phases. Rotation of the hot star leads to the compression of the outflowing material towards its equatorial plane.
Cariková Z., Skopal A.
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The effect of subauroral polarization streams on the mid-latitude thermospheric disturbance neutral winds: a universal time effect [PDF]
Annales Geophysicae, 2018 The temporal and spatial variations in thermospheric neutral winds at an altitude of 400 km in response to subauroral polarization streams (SAPS) are investigated using global ionosphere and thermosphere model simulations under the southward ...
H. Wang +4 more
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Field and Wind Tunnel Experiments of Wind Field Simulation in the Neutral Atmospheric Boundary Layer
Atmosphere, 2022 To investigate the pollutant dispersion of a nuclear power plant, a field tracing experiment was carried out in neutral stratification weather with the main wind direction SSW.
Dong Xie +5 more
doaj +1 more source