Results 91 to 100 of about 6,139 (217)

Observations of neutral circulation at mid-latitudes during the Equinox Transition Study [PDF]

Measurements of ion drift velocity made by the Millstone Hill incoherent scatter radar have been used to calculate the meridional neutral wind velocity during the Sept. 17 to 24, 1984 period.
Buonsanto, M. J., Burnside, R. G., Miller, K. L., Oliver, W. L., Richards, P. G., Salah, J. E.   +5 more
core   +1 more source

Note on the semi-annual effect in the thermosphere [PDF]

The semi-annual variation in the thermospheric density is discussed in terms of the spatial and temporal variations in the solar heat input. Two heat sources are considered: the solar heat input associated with the semi-annual migration of the sun, and ...
Mayr, H. G., Volland, H.
core   +1 more source

An assessment of twilight airglow inversion procedures using atmosphere explorer observations [PDF]

The aim of this research project was to test and truth some recently developed methods for recovering thermospheric oxygen atom densities and thermospheric temperatures from ground-based observations of the 7320 A O(+)((sup 2)D - (sup 2)P) twilight air ...
Mcdade, I. C., Sharp, W. E.
core   +1 more source

Role of gravity waves in vertical coupling during sudden stratospheric warmings

, 2016
Gravity waves are primarily generated in the lower atmosphere, and can reach thermospheric heights in the course of their propagation. This paper reviews the recent progress in understanding the role of gravity waves in vertical coupling during sudden ...
Medvedev, Alexander S., Yiğit, Erdal
core   +1 more source

The diurnal heat budget of the thermosphere [PDF]

Detailed numerical calculations of thermospheric heat sources and sinks are presented and their relative importance is discussed in reference to the energy balance phenomena of the neutral atmosphere.
Chandra, S., Sinha, A. K.
core   +1 more source

Applying Energy Dissipation Rate GNSS Accelerometry to a Non‐Circular Orbiting Satellite

Earth and Space Science
The increase in the number of objects in Low‐Earth Orbit has heightened the demand for high‐accuracy orbital prediction models driven by dependable measurements of thermospheric mass density (TMD).
D. J. Fitzpatrick, R. L. Bishop, M. D. Pilinski, S. E. Palo   +3 more
doaj   +1 more source

Six reasons why thermospheric measurements and models disagree [PDF]

The differences between thermospheric measurements and models are discussed. Sometimes the model is in error and at other times the measurements are, but it also is possible for both to be correct, yet have the comparison result in an apparent ...
Moe, Kenneth
core   +1 more source

Thermospheric Exospheric Temperature and Composition Responses on 15 January 2022 Tonga Volcanic Eruption Based on the Ionosonde Observations

Geophysical Research Letters
We report thermospheric exospheric temperature and composition responses on the 15 January 2022 Tonga volcanic eruption. The temperature and composition profiles are inversed from three ionosonde (MHJ45, EG931, FF051) observed electron density profiles (∼
Tingting Yu, Zhipeng Ren, Shaoyang Li, Feng Ding, Changzhi Zhai   +4 more
doaj   +1 more source

Development and Validation of the Whole Atmosphere Community Climate Model With Thermosphere and Ionosphere Extension (WACCM‐X 2.0)

Journal of Advances in Modeling Earth Systems, 2018
Key developments have been made to the NCAR Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (WACCM‐X). Among them, the most important are the self‐consistent solution of global electrodynamics, and transport of O+ in ...
Han‐Li Liu, Charles G. Bardeen, Benjamin T. Foster, Peter Lauritzen, Jing Liu, Gang Lu, Daniel R. Marsh, Astrid Maute, Joseph M. McInerney, Nicholas M. Pedatella, Liying Qian, Arthur D. Richmond, Raymond G. Roble, Stanley C. Solomon, Francis M. Vitt, Wenbin Wang   +15 more
doaj   +1 more source

Unveiling the combined effects of neutral dynamics and electrodynamic forcing on dayside ionosphere during the 3-4 February 2022 "SpaceX" geomagnetic storms. [PDF]

Sci Rep, 2023
Kakoti G, Bagiya MS, Laskar FI, Lin D.
europepmc   +1 more source