Results 11 to 20 of about 19,021 (226)

Do Eclipse‐Induced Thermospheric TADs Originate From Above or Below?

Geophysical Research Letters
Solar eclipses generate significant wave activity in the Earth's upper atmosphere. The source region of eclipse‐induced Traveling Atmospheric Disturbances (TADs) in the upper thermosphere—particularly the relative contributions of gravity waves from the ...
Yu Jiao, Jing Liu, Shuhan Li, Joseph M. McInerney, Jianyong Li, Yuyan Yang   +5 more
doaj   +2 more sources

Thermospheric tides during thermosphere mapping study periods [PDF]

Advances in Space Research, 1987
Neutral exospheric temperatures at 53°, 43° and 33° latitude from Millstone Hill steerable-antenna Thomson scatter measurements, and at 19° latitude from the Arecibo Observatory, obtained during three Thermosphere Mapping Study (TMS) coordinated campaign intervals during 1984 and 1985. are analyzed for diurnal and semidiurnal tidal components.
Forbes, J. M., Oller, William L., Burnside, R. G., Tepley, C. A.   +3 more
openaire   +2 more sources

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

Atmospheric and Ionospheric Responses to Hunga‐Tonga Volcano Eruption Simulated by WACCM‐X

Geophysical Research Letters, 2023
High‐resolution Whole Atmosphere Community Climate Model with thermosphere/ionosphere extension is used to simulate the responses to the Hunga‐Tonga volcano eruption on 15 January 2022.
H.‐L. Liu, W. Wang, J. D. Huba, P. H. Lauritzen, F. Vitt   +4 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

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

Swarm A and C Accelerometers: Data Validation and Scientific Interpretation

Earth and Space Science, 2023
The fourth European Space Agency Earth Explorer (Swarm) was launched in 2013 and it comprises a constellation of three identical satellites. The primary mission objective is analyzing and modeling the geomagnetic field and its temporal evolution, based ...
Elisabetta Iorfida, Ilias Daras, Roger Haagmans, Anja Strømme   +3 more
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

Assimilation of thermospheric measurements for ionosphere‐thermosphere state estimation [PDF]

Radio Science, 2016
AbstractWe develop a method that uses data assimilation to estimate ionospheric‐thermospheric (IT) states during midlatitude nighttime storm conditions. The algorithm Estimating Model Parameters from Ionospheric Reverse Engineering (EMPIRE) uses time‐varying electron densities in the F region, derived primarily from total electron content data, to ...
Daniel S. Miladinovich, Seebany Datta‐Barua, Gary S. Bust, Jonathan J. Makela   +3 more
openaire   +1 more source