Results 11 to 20 of about 24,484 (206)

Thermospheric nitric oxide is modulated by the ratio of atomic to molecular oxygen and thermospheric dynamics during solar minimum [PDF]

Atmospheric Chemistry and Physics
The formation of nitric oxide (NO) by geomagnetic activity and EUV photoionization in the upper mesosphere and lower thermosphere, and its subsequent impact on ozone, contributes to the natural forcing of the climate system, and has been recommended to ...
M. Sinnhuber, C. Arras, C. Arras, S. Bender, B. Funke, H. Liu, D. R. Marsh, T. Reddmann, E. Rozanov, T. Sukhodolov, M. E. Szelag, J. M. Wissing   +11 more
doaj   +1 more source

IMF Dependence of Midnight Bifurcation in the Thermospheric Wind at an Auroral Latitude Based on Nine Winter Measurements in Tromsø, Norway

Geophysical Research Letters, 2023
A thermospheric wind data set from a Fabry‐Perot interferometer (630 nm) and the ion velocity from a Dynasonde in Tromsø, Norway, was analyzed for nine winter seasons to study the dynamics of the thermosphere and F‐region ionosphere at an auroral ...
S. Oyama, K. Hosokawa, H. Vanhamäki, A. Aikio, T. Sakanoi, L. Cai, I. I. Virtanen, K. Shiokawa, N. Nishitani, A. Shinbori, Y. Ogawa   +10 more
doaj   +1 more source

The Impact of Assimilating Ionosphere and Thermosphere Observations on Neutral Temperature Improvement: Observing System Simulation Experiments Using EnKF

Space Weather, 2021
Accurate specification of the thermosphere states is crucial to the low Earth orbit satellite operation. In this work, the impact of different ionosphere and thermosphere observing systems on the improvement of neutral temperature of the data ...
Jianhui He, Xinan Yue, Zhipeng Ren
doaj   +1 more source

Effects of Latitude-Dependent Gravity Wave Source Variations on the Middle and Upper Atmosphere

Frontiers in Astronomy and Space Sciences, 2021
Atmospheric gravity waves (GWs) are generated in the lower atmosphere by various weather phenomena. They propagate upward, carry energy and momentum to higher altitudes, and appreciably influence the general circulation upon depositing them in the middle
Erdal Yiğit, Alexander S. Medvedev, Manfred Ern   +2 more
doaj   +1 more source

The Effect of the Thermosphere on Ionosphere Outflows

Frontiers in Astronomy and Space Sciences, 2021
The Naval Research Laboratory (NRL) Sami2 is Another Model of the Ionosphere (SAMI2) and Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere codes have shown that thermosphere composition and winds significantly affect H+ outflows ...
J. Krall, J. D. Huba
doaj   +1 more source

Spatial and temporal correlations of thermospheric zonal winds from GOCE satellite observations

Frontiers in Astronomy and Space Sciences, 2023
Winds in the thermosphere play an important role in the transport of momentum and energy in the upper atmosphere and affect the composition, dynamics and morphology of the ionospheric plasma.
Ivana Molina, Ludger Scherliess
doaj   +1 more source

Gas-surface interactions modelling influence on satellite aerodynamics and thermosphere mass density

Journal of Space Weather and Space Climate, 2021
The satellite acceleration data from the CHAMP, GRACE, GOCE, and Swarm missions provide detailed information on the thermosphere density over the last two decades.
March Günther, van den IJssel Jose, Siemes Christian, Visser Pieter N. A. M., Doornbos Eelco N., Pilinski Marcin   +5 more
doaj   +1 more source

Extreme enrichment in atmospheric 15N15N. [PDF]

, 2017
Molecular nitrogen (N2) comprises three-quarters of Earth's atmosphere and significant portions of other planetary atmospheres. We report a 19 per mil (‰) excess of 15N15N in air relative to a random distribution of nitrogen isotopes, an enrichment that ...
Fischer, Tobias P, Haslun, Joshua A, Hu, Huanting, Kohl, Issaku E, Li, Shuning, Ostrom, Nathaniel E, Schauble, Edwin A, Yeung, Laurence Y, Young, Edward D   +8 more
core   +1 more source

Long-term variations of the upper atmosphere parameters on Rome ionosonde observations and their interpretation

Journal of Space Weather and Space Climate, 2017
A recently proposed self-consistent approach to the analysis of thermospheric and ionospheric long-term trends has been applied to Rome ionosonde summer noontime observations for the (1957–2015) period.
Perrone Loredana, Mikhailov Andrey, Cesaroni Claudio, Alfonsi Lucilla, Santis Angelo De, Pezzopane Michael, Scotto Carlo   +6 more
doaj   +1 more source

High time resolution measurements of the thermosphere from Fabry-Perot Interferometer measurements of atomic oxygen [PDF]

, 2007
Recent advances in the performance of CCD detectors have enabled a high time resolution study of the high latitude upper thermosphere with Fabry-Perot Interferometers(FPIs) to be performed.
E. A. K. Ford, E. A. K. Ford, A. L. Aruliah, E. M. Griffin, I. McWhirter   +4 more
core   +3 more sources