Results 21 to 30 of about 225 (104)

Seasonal Propagation Characteristics of MSTIDs Observed at High Latitudes Over Central Alaska Using the Poker Flat Incoherent Scatter Radar [PDF]

, 2018
Near‐continuous electron density measurements obtained over a ∼3 year period, 2010–2013, using the Poker Flat Incoherent Scatter Radar (PFISR) in central Alaska (69°N, 147°W) have been analyzed to quantify the properties of over 650 high‐latitude medium ...
Afraimovich, Afraimovich, Bauer, Bishop, Booker, Bristow, Bristow, Chimonas, Chisham, Crowley, Crowley, Davies, Davies, Del Genio, Ding, Djuth, Djuth, Drob, Evans, Fedorenko, Francis, Francis, Francis, Friedman, Frissell, Frissell, Fritts, Fritts, Fritts, Fukao, Galushko, Garcia, Georges, Georges, Gossard, Greenwald, Grocott, Hazel, He, Heale, Hedin, Heinselman, Hernández-Pajares, Hines, Hines, Hines, Hocke, Hocke, Holton, Holton, Hooke, Huang, Huang, Hung, Hung, Hung, Hunsucker, Hysell, Ishida, Kelley, Klostermeyer, Kotake, Kubota, Lindzen, Ma, MacDougall, Mathews, Morgan, Munro, Nicolls, Nicolls, Nicolls, Ogawa, Ogawa, Oliver, Onishi, Paulino, Picone, Pinger, Pitteway, Prasad, Ratovsky, Reid, Richmond, Röttger, Samson, Samson, Sekar, Sekar, Shiokawa, Shiokawa, Sojka, Taylor, Taylor, Tedd, Testud, Vadas, Vadas, Vadas, Vadas, Vadas, Vadas, Vadas, Vadas, Vlasov, Waldock, Waldock, Waldock, Yigit, Yiğit, Zhang   +110 more
core   +2 more sources

High-latitude thermospheric wind study using a Fabry-Perot interferometer at Tromsø in Norway : averages and variations during quiet times [PDF]

, 2019
The average winds in the thermosphere during geomagnetically quiet times are important because they provide a baseline wind in the upper atmosphere, but they remain insufficiently understood at high latitudes.
Nozawa, Satonori, Oyama, Shin-ichiro, Shiokawa, Kazuo, Xu, Heqiucen   +3 more
core   +1 more source

Registering upper atmosphere parameters in East Siberia with Fabry–Perot Interferometer KEO Scientific “Arinae”

Solar-Terrestrial Physics, 2017
We describe the Fabry—Perot interfero-meter designed to study Earth’s upper atmosphere. We propose a modification of the existing data processing method for determining the Doppler shift and Doppler widening and also for separating the observed line ...
Vasilyev R.V., Artamonov M.F., Beletsky A.B., Zherebtsov G.A., Medvedeva I.V., Mikhalev A.V., Syrenova T.E.   +6 more
doaj   +1 more source

Evidence for Horizontal Blocking and Reflection of a Small‐Scale Gravity Wave in the Mesosphere [PDF]

, 2020
The variations of the horizontal phase velocity of an internal gravity wave, generated by wave “blocking” or “reflection” due to an inhomogeneous wind field, have been predicted theoretically and numerically investigated but had yet to be captured ...
Criddle, Neal R., Heale, C., Pautet, Pierre-Dominique, Snively, J., Taylor, Michael J., Yuan, Tao, Zhao, Yucheng   +6 more
core   +5 more sources

Atmospheric Chemistry Experiment (ACE) v.5.3 winds: validation and model comparisons [PDF]

Atmospheric Measurement Techniques
The Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) uses limb geometry to measure transmittance spectra of Earth's atmosphere by solar occultation.
M. Wyatt, P. F. Bernath, P. F. Bernath, P. F. Bernath, C. Boone, L. Lavy, R. Johnson   +6 more
doaj   +1 more source

Semi empirical longitudinal averaged termospheric wind model at 250 km for solar and geomagnectic activities quiet time [PDF]

, 2020
This paper presents a semi empirical model of averaged longitudinal thermospheric neutral wind for quiet time periods of solar and geomagnetic activities with dependence on local time, day of the year and geographical latitude for 250 km of altitude ...
Asevedo Júnior, Wivaldo Dantas de, Brum, Christiano Garnett Marques, Fernandez, José Henrique, Guedes, Anderson Guimarães   +3 more
core   +1 more source

Storm-Time Equatorial Thermospheric Dynamics and Electrodynamics [PDF]

, 2020
We present the first complete study of the dynamics of the equatorial upper atmosphere (180-350 km) during periods of strong magnetic activity driven by the Sun, which are generally referred as geomagnetic storms.
Navarro Dominguez, Luis A.
core   +1 more source

Statistical Spectral Characteristics of Three-Dimensional Winds in the Mesopause Region Revealed by the Andes Lidar [PDF]

, 2021
By analyzing data recorded at the Andes Lidar Observatory in Cerro Pachon, Chile (30.3°S, 70.7°W) from May 2014 to July 2019, we investigated the fundamental features of three-dimensional wind and temperature spectra.
Gan, Quan, Gong, Yun, Huang, Chun Ming, Huang, Kai Ming, Li, Qian, Liu, Alan Z., Liu, Hang, Yan, Yan Ying, Zhang, Shao Dong   +8 more
core   +1 more source

Accelerating Atmospheric Gravity Wave Simulations using Machine Learning: Kelvin-Helmholtz Instability and Mountain Wave Sources Driving Gravity Wave Breaking and Secondary Gravity Wave Generation [PDF]

, 2023
Gravity waves (GWs) and their associated multi-scale dynamics are known to play fundamental roles in energy and momentum transport and deposition processes throughout the atmosphere. We describe an initial, two-dimensional (2-D), machine learning model –
Dong, Wenjun, Fritts, David, Liu, Alan Z, Liu, Hanli, Snively, Jonathan   +4 more
core   +2 more sources

Research on Kalman Filter Assimilation Technology for Wind Field Information from Qujing Meteor Radar

Remote Sensing
All-sky meteor radars are widely employed to observe the near-space atmospheric wind field, a crucial parameter of the near-space environment. Owing to the spatiotemporal uncertainty in meteor count distribution, meteor radars may encounter measurement ...
Xingxin Sun, Chunhua Jiang, Jian Feng, Yi Liu, Yewen Wu, Tong Xu, Jiandong Qiao, Zhongxin Deng, Chen Zhou, Yuqiang Zhang   +9 more
doaj   +1 more source