Results 11 to 20 of about 6,471 (197)

The Effect of Variable Na/K on the CO2 Content of Slab‐Derived Rhyolitic Melts

open access: yesGeophysical Monograph Series, Page 195-208., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Michelle Muth   +2 more
wiley  

+2 more sources

Terrestrial exospheric hydrogen density distributions under solar minimum and solar maximum conditions observed by the TWINS stereo mission [PDF]

open access: yesAnnales Geophysicae, 2015
Circumterrestrial Lyman-α column brightness observations above 3 Earth radii (Re) have been used to derive separate 3-D neutral hydrogen density models of the Earth's exosphere for solar minimum (2008, 2010) and near-solar-maximum (2012) conditions ...
J. H. Zoennchen, U. Nass, H. J. Fahr
doaj   +1 more source

Surface Exospheric Interactions

open access: yesSpace Science Reviews, 2023
AbstractGas-surface interactions at the Moon, Mercury and other massive planetary bodies constitute, alongside production and escape, an essential element of the physics of their gravitationally bound exospheres. From condensation and accumulation of exospheric species onto the surface in response to diurnal and seasonal changes of surface temperature,
Teolis, Ben   +11 more
openaire   +2 more sources

Mercury's subsolar sodium exosphere: an ab initio calculation to interpret MASCS/UVVS observations from MESSENGER [PDF]

open access: yesAnnales Geophysicae, 2019
The optical spectroscopy measurements of sodium in Mercury's exosphere near the subsolar point by MESSENGER Mercury Atmospheric and Surface Composition Spectrometer Ultraviolet and Visible Spectrometer (MASCS/UVVS) have been interpreted before with a ...
D. Gamborino, A. Vorburger, P. Wurz
doaj   +1 more source

Ionization in atmospheres of brown dwarfs and extrasolar planets. IV. The effect of cosmic rays [PDF]

open access: yes, 2013
Cosmic rays provide an important source for free electrons in Earth's atmosphere and also in dense interstellar regions where they produce a prevailing background ionization. We utilize a Monte Carlo cosmic ray transport model for particle energies of 10(
Helling, Christiane, Rimmer, Paul
core   +2 more sources

Neutralized solar wind ahead of the Earth's magnetopause as contribution to non-thermal exospheric hydrogen [PDF]

open access: yesAnnales Geophysicae, 2018
In a most recent paper by Qin and Waldrop (2016), it had been found that the scale height of hydrogen in the upper exosphere of the Earth, especially during solar minimum conditions, appears to be surprisingly large. This indicates that during minimum
H. J. Fahr   +3 more
doaj   +1 more source

The long egress of GJ~436b's giant exosphere [PDF]

open access: yes, 2017
The M dwarf GJ 436 hosts a transiting warm Neptune known to experience atmospheric escape. Previous observations revealed the presence of a giant hydrogen exosphere transiting the star for more than 5 h, and absorbing up to 56% of the flux in the blue ...
Berna, A. Gracia   +10 more
core   +3 more sources

Recent investigations of the near-Mars space environment by the planetary aeronomy and space physics community in China

open access: yesEarth and Planetary Physics, 2020
The present issue of Earth and Planetary Physics is dedicated to the near-space neutral and plasma environments of Mars. The issue includes nine papers that present new results on the properties of the Martian exosphere, ionosphere, and magnetosphere ...
Jun Cui   +3 more
doaj   +1 more source

Observability of hydrogen-rich exospheres in Earth-like exoplanets

open access: yes, 2018
(Abridged) The existence of an extended neutral hydrogen exosphere around small planets can be used as an evidence for the presence of water in their lower atmosphere but, to date, such feature has not been securely detected in rocky exoplanets ...
Bourrier, Vincent   +3 more
core   +1 more source

Long-term variability of CO2 and O in the Mars upper atmosphere from MRO radio science data [PDF]

open access: yes, 2015
We estimate the annual variability of CO2 and O partial density using approximately 6years of Mars Reconnaissance Orbiter (MRO) radio science data from August 2006 to January 2012, which cover three full Martian years (from the northern hemisphere summer
Fricke, Susan K.   +6 more
core   +1 more source

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