EXPLOSION-TYPE GEOPHYSICAS PHENOMENAS IN EARTH ATMOSPHERE

A hydrogen-rich early Earth atmosphere.

We show that the escape of hydrogen from early Earth's atmosphere likely occurred at rates slower by two orders of magnitude than previously thought. The balance between slow hydrogen escape and volcanic outgassing could have maintained a hydrogen mixing ratio of more than 30%. The production of prebiotic organic compounds in such an atmosphere would have been more efficient than either exogeno...

CONTINUOUS FREE OSCILLATIONS: Atmosphere-Solid Earth Coupling

■ Abstract In 1997, after almost forty years since the initial attempt by Benioff et al (1959), continuous free oscillations of the Earth were discovered. Spheroidal fundamental modes between 2 and 7 millihertz are excited continuously with acceleration amplitudes of about 0.3–0.5 nanogals. The signal is now commonly found in virtually all data recorded by STS-1 type broadband seismometers at q...

Visual Simulation of Refraction Phenomena in the Earth?s Atmosphere

Comment on "A hydrogen-rich early Earth atmosphere".

Tian et al. (Reports, 13 May 2005, p. 1014) proposed a hydrogen-rich early atmosphere with slow hydrogen escape from a cold thermosphere. However, their model neglects the ultraviolet absorption of all gases other than H2. The model also neglects Earth's magnetic field, which affects the temperature and density of ions and promotes nonthermal escape of neutral hydrogen.

Preface “ Earth observation for land – atmosphere interaction science ”

D. Fernández-Prieto1, J. Kesselmeier2, M. Ellis3, M. Marconcini4, A. Reissell5, and T. Suni5 1European Space Agency, ESRIN, Via Galileo Galilei, 00044, Frascati, Italy 2Max Planck Institute for Chemistry, Hahn-Meitner-Weg 1 55128 Mainz 3BGS Science Programme, UK 4Deutsches Zentrum für Luftund Raumfahrt (DLR), German Aerospace Center, Oberpfaffenhofen, 82234 Wessling, Germany 5iLEAPS Internation...