Results 121 to 130 of about 111,617 (268)

Magnetic Aspect Sensitivity of Nonspecular Meteor Trail Echoes

Geophysical Research Letters
The ablation of micrometeoroids entering Earth's atmosphere leaves behind a hot, dense column of plasma between 80 and 120 km altitude. Sharp density gradients can drive the plasma unstable, leading to turbulence and waves at the same altitude, which are
Alexander Q. Green, Meers M. Oppenheim
doaj   +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

Bio‐mediated cementation of supratidal beach sediments associated with groundwater springs

Sedimentology, EarlyView.
ABSTRACT The formation of beachrock, sensu stricto, via carbonate precipitation in the intertidal zone is widespread throughout the tropics and subtropics. While cementation of supratidal beach sediments has also been noted in several locations, it has received much less attention.
Thomas William Garner, J. Andrew G. Cooper   +1 more
wiley   +1 more source

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

Sedimentology, EarlyView.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source

Exploring a Potentially Significant New(?) Mechanism for Methane Generation on Mars [PDF]

An unexplored mechanism for methane production on Mars is presented here. Meteor showers have been hypothesized [1] as an explanation for episodic martian methane events [2-7], as the timing of meteor showers consistently correlates with the episodic ...
Fries, M.
core   +1 more source

Meteoric Dust [PDF]

Science, 1881
openaire   +2 more sources

Tree‐Ring Oxygen Isotope Values During the Last Glacial Maximum and Insights to Future Changes in Climate

Terra Nova, EarlyView.
ABSTRACT Annual tree‐ring oxygen‐isotope values were measured from sections of two fossil logs of Picea mariana (black spruce) recovered from last glacial maximum proglacial sediment in Illinois, USA. Collectively, the specimens date from ca. 25,130 to 24,720 cal years BP.
Dana M. Labotka, Mostafa J. Fayek, B. Brandon Curry   +2 more
wiley   +1 more source

Strategic options for the newspaper publishing companies. [PDF]

Tevens verschenen als: Research Memorandum / METEOR, Universiteit Maastricht. - (RM04003)
Kranenburg, H.L. van
core   +1 more source

Finding Stars: Mapping the Geography of the World's Scientific Elites

Transactions of the Institute of British Geographers, EarlyView.
Short Abstract Scientific excellence is clustering ever more tightly in a few ‘superstar’ cities. Four—New York, Boston, London and the San Francisco Bay Area—now host 12% of the world's top scientists. In contrast, the Global South remains largely absent, with the notable exception of Beijing's dramatic rise.
Andrés Rodríguez‐Pose, Leiboyu Xiang, Neil Lee   +2 more
wiley   +1 more source

Motion of a fragment in disturbed air behind a meteor body [PDF]

The effect of disturbed air behind the meteor body on the motion and ablation of fragments observed partly as the difference between the photometrically and the dynamically determined masses of the meteor body.
Padevet, V.
core   +1 more source