Results 61 to 70 of about 20,447 (217)
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.Abstract We find observational evidence for mountain waves (MWs) and secondary gravity waves (2GWs) in the OH*(3‐1) layer above Tierra del Fuego, Argentina. On the night of 21–22 May 2018, the Advanced Mesospheric Temperature Mapper (AMTM) obtained temperatures at ∼84 ${\sim} 84$ km.
Robert Reichert +7 more
wiley +1 more source
The return of the Andromedids meteor shower [PDF]
, 2012 The Andromedid meteor shower underwent spectacular outbursts in 1872 and 1885, producing thousands of visual meteors per hour and described as `stars fell like rain' in Chinese records of the time.
Brown, Peter G. +3 more
core +1 more source
Global variation of meteor trail plasma turbulence [PDF]
Annales Geophysicae, 2011 We present the first global simulations on the occurrence of meteor trail plasma irregularities. These results seek to answer the following questions: when a meteoroid disintegrates in the atmosphere, will the resulting trail become plasma turbulent ...
L. P. Dyrud +4 more
doaj +1 more source
First LiDAR Observation of Quasi‐Periodic Structures in Mid‐Latitude E‐Region Meteoric Ca+ Layers
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract We report the first LiDAR observations of continuous quasi‐periodic (QP) metal density structures in mid‐latitude E‐region meteoric Ca+ layers using an all‐solid‐state LiDAR system in Beijing (40.4°N, 116.0°E). These QP Ca+ structures, with periods of 2–30 min and vertical wavelengths of ∼2–15 km, were primarily observed above 100 km.
Jixin Guo +9 more
wiley +1 more source
1I/2017 U1 (`Oumuamua) is Hot: Imaging, Spectroscopy and Search of Meteor Activity [PDF]
, 2017 1I/2017 U1 (`Oumuamua), a recently discovered asteroid in a hyperbolic orbit, is likely the first macroscopic object of extrasolar origin identified in the solar system.
Brown, Peter G. +3 more
core +3 more sources
Earth Surface Processes and Landforms, Volume 51, Issue 3, March 2026.Abstract Evaluating the state of activity of Deep‐Seated Gravitational Slope Deformation (DSGSD) is a challenge that requires multidisciplinary analytical approaches. This research focuses on the slope‐scale gravitational process, framing the role of the Quaternary morphodynamics of a river valley where multiple DSGSDs coexist, to reconstruct the ...
Giorgia Berardo +5 more
wiley +1 more source
Temperatures Using radar‐meteor decay times [PDF]
Geophysical Research Letters, 1999 Experimental studies of the temperature and pressure dependence of the ambipolar diffusion coefficient in the mesopause region have been undertaken by studying meteor trail decay times with radars at a variety of sites in North America, with latitudes between 75N and 35N.
openaire +1 more source
Epilogue: Towards an Abolitionist Camp Studies
Population, Space and Place, Volume 32, Issue 2, March 2026.ABSTRACT Camp studies have grown markedly in recent years. While the field has by and large been critical of camps as spatial technologies of protective custody, biopolitical control, minority oppression, racial segregation, custodial care, militarised rule and colonisation, there has been a reluctance to embrace more overtly abolitionist approaches ...
Hanno Brankamp
wiley +1 more source
5. Long-term variations in meteor radar rates, meteor heights and radar-echo amplitudes [PDF]
Symposium - International Astronomical Union, 1968 An analysis of meteor radar rates, meteor end-point heights and radar-echo amplitudes observed over the period 1953–66 indicates a long-term variation in these quantities with highest values being recorded in 1963 near solar minimum. The phenomenon is explained in terms of a solar-controlled variation in air density at the 90- to 110-km level, with ...
openaire +1 more source
First Coincident Radar and Optical Observations of a Meteor Radio Afterglow
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract It has been hypothesized that Meteor Radio Afterglows (MRAs) occur due to resonant transition radiation (RTR) where suprathermal electrons emit as they pass through electron density inhomogeneities in a turbulent plasma. Meteor trails are thought to produce suprathermal electrons through anion oxidation, which can be identified through meteor ...
K. S. Obenberger +15 more
wiley +1 more source