M.: A non-stoichiometric model of the composition of the atmospheres of Mercury and the Moon. Planet. Space Sci. 45 (1997), pp.81-94.Morgan, T.H., Killen, R.M., 1997. A non-stoichiometric model of the composition of the atmosphere of Mercury and the Moon. Planet. Space Sci. 45...
that have not been detected in ground-based observations. TheMESSENGERspacecraft carries aUVSas part of theMercury Atmosphereand Surface Composition Spectrometer (MASCS) instrument package. This spectrometer operates from 115 to 600nm and its goal is to map the constituents of the atmosphere and prov...
The outstanding questions and issues regarding Mercury's exosphere stem from our current lack of knowledge concerning the surface composition, the magnetic field behavior within the local space environment, and the character of the local space environment.doi:10.1007/s11214-007-9260-9...
Although the last of these mechanisms has been admitted to be improbable by its proponents, they have shown that it is by no means impossible dynamically. The principal objection to this mechanism is the strange composition of the Moon. It has been recognized for many years that the low mean...
Earth’s surface underwent a dramatic transition ~2.3 billion years ago when atmospheric oxygen first accumulated during the Great Oxidation Event, but the detailed composition of the reducing early atmosphere is not well known. Here we develop mercury (Hg) stable isotopes as a proxy for paleoatmos...
Mercury's surface is also characterized by variations in color and texture, reflecting the chemical and mineralogical composition of the rock. Measurements made by the MESSENGER mission revealed that Mercury's surface contains a large amount of ferrous silicates and heavy metals, such as iron, ...
atmospheric compositionecologyhealth hazardsmercury (metal)/ mercury emissionsterrestrial ecosystemaquatic ecosystemtransport mediapoint emission sourcediffuse emission sourceMercury emissions to the atmosphere and its transport, transformation and deposition to and re-emission from terrestrial and aquatic ecosystems...
Our study demonstrates Hg isotope approach is a powerful tool for tracing the sources (and pathways) of Hg and its vectors in the atmosphere, and stresses the importance of studying toxic metals such as Hg (and other heavy metals) in atmospheric particles and their potential threat to human ...
of Hg deposited to the cryosphere during spring. Air mass back trajectories support a cryospheric Hg emission source but no major terrestrial source. This implies that terrestrial Hg inputs to the Arctic Ocean remain in the marine ecosystem, without substantial loss to the global atmosphere, but ...
Elementalmercury vaporis emitted into the atmosphere from both natural and anthropogenic sources. Although volcanoes are an important natural source, coal-burning power stations, and municipal waste incinerators make up the bulk of man-made contributions (40% of the mercury emissions in the United Sta...