Results 71 to 80 of about 20,447 (217)

Formation of plasma around a small meteoroid: simulation and theory [PDF]

, 2018
High‐power large‐aperture radars detect meteors by reflecting radio waves off dense plasma that surrounds a hypersonic meteoroid as it ablates in the Earth's atmosphere.
Birdsall, Bouanich, Bronshten, Campbell-Brown, Campbell-Brown, Ceplecha, Chau, Close, Close, Close, Dimant, Dimant, Dyrud, Dyrud, Janches, Jones, Jones, Marshall, Marshall, McKinley, Oppenheim, Oppenheim, Rogers, Schunk, Sugar, Towns, Vondrak, Zinn   +27 more
core   +1 more source

Thermospheric Energy and Heating Due To Upward Propagating and in Situ Generated Tides During Solar Cycle 24

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract We investigate vertical and horizontal energy transport and associated heating in the thermosphere due to both upward propagating and in situ generated migrating and nonmigrating diurnal and semidiurnal tides over the solar cycle 24 (2009–2019).
Mukta Neogi, Jens Oberheide, Xian Lu
wiley   +1 more source

Meteor radiant mapping with MU radar [PDF]

The radiant point mapping of meteor showers with the MU radar by using a modified mapping method originally proposed by Morton and Jones (1982) was carried out. The modification is that each meteor echo was weighted by using the beam pattern of the radar
Miyashita, A., Nakamura, Tsuko, Tsuda, T., Tsutsumi, M., Watanabe, Jun-Ichi, Yoshikawa, M.   +5 more
core   +1 more source

Observations of the daytime boundary layer in deep alpine valleys [PDF]

, 2006
Peer ...
Chemel, C., Chollet, J.P.
core   +3 more sources

Constraining Greenhouse Gas Cycling and Emissions in Africa's Largest Humic Lake

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 3, March 2026.
Abstract Humic tropical lakes and wetlands are globally important sources of atmospheric greenhouse gases (GHGs). However, mechanistic insight into GHG cycling in such systems remains limited—especially in understudied central Africa. To address this, here we measured high‐, falling‐, and low‐water seasonal concentrations and isotopic compositions of ...
M. Barthel, T. W. Drake, A. de Clippele, L. W. de Groot, M. Engelhardt, N. Haghipour, Y. Hou, N. Kueter, D. Lewicka‐Szczebak, A. Ludjwera Bahati, C. L. Tschumbu, K. Van Oost, J. N. Wabakanghanzi, R. A. Werner, J. Zambo Mandea, J. Six, J. D. Hemingway   +16 more
wiley   +1 more source

Physical and dynamical studies of meteors [PDF]

Distribution of meteors in streams detected in the synoptic-year meteor sample plus a study of the fragmentation characteristics of the synoptic-year meteor sample are presented.
Sekanina, Z., Southworth, R. B.
core   +1 more source

Validation of Ionospheric Models at Mid‐ and High‐Latitudes: Climatological Performance of WACCM‐X (SD) and TIE‐GCM in foF2

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Modeling the high‐latitude ionosphere‐thermosphere system is imperative to understanding the impacts of space weather on modern technology, such as communications and navigation systems. At low‐ and mid‐latitudes, physics‐based and empirical models are well‐developed and capture the variability of the ionosphere to a good degree of accuracy ...
Emma‐Claire Gurney, David R. Themens, Matthew K. Brown, Sean Elvidge   +3 more
wiley   +1 more source

Physical and dynamical studies of meteors. Meteor-fragmentation and stream-distribution studies [PDF]

Population parameters of 275 streams including 20 additional streams in the synoptic-year sample were found by a computer technique. Some 16 percent of the sample is in these streams.
Sekanina, Z., Southworth, R. B.
core   +1 more source

Role of the Diurnal Tide in Driving the Westward Phase of the Mesospheric Semiannual Oscillation Around March Equinox

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract The mesospheric semiannual oscillation (MSAO) in tropical zonal‐mean zonal winds exhibits a strong westward phase around March equinox. It has been thought that the migrating diurnal tide (DW1) plays a role in the initiation of this phase because DW1 peaks around this time and satellite observations have shown it to undergo wave breaking.
Christopher S. Krier, Hanli Liu, Guiping Liu   +2 more
wiley   +1 more source

Ablation in meteors [PDF]

A comparison of theoretical calculations with the results of radar meteor observations shows that the theory of radio meteors satisfactorily represents observational data.
Lebedinets, V. N.
core   +1 more source