Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Subject oceanic emission

The second important source for the hydrosphere and the oceans are asteroids and comets. Estimating the amount of water which was brought to Earth from outer space is not easy. Until 20 years ago, it was believed that the only source of water for the hydrosphere was gas emission from volcanoes. The amount of water involved was, however, unknown (Rubey, 1964). First estimates of the enormous magnitude of the bombardment to which the Earth and the other planets were subjected caused researchers to look more closely at the comets and asteroids. New hypotheses on the possible sources of water in the hydrosphere now exist the astronomer A. H. Delsemme from the University of Toledo, Ohio, considers it likely that the primeval Earth was formed from material in a dust cloud containing anhydrous silicate. If this is correct, all the water in today s oceans must be of exogenic origin (Delsemme, 1992). [Pg.38]

Like ozone, sulfur dioxide is subject to deposition into the oceans, with no re-emission. This arises from the high reactivity of the gas in seawater, which ensures its rapid destruction in the water and effective zero surface-water concentration driving the one-way flux (Liss, 1971). The high solubility and aqueous reactivity of SO2 makes its exchange subject to gas phase control (see Section 6.03.2.1.1). [Pg.2928]


See other pages where Subject oceanic emission is mentioned: [Pg.189]    [Pg.80]    [Pg.17]    [Pg.820]    [Pg.762]    [Pg.143]    [Pg.2]    [Pg.1477]    [Pg.2168]    [Pg.4247]    [Pg.285]    [Pg.224]    [Pg.178]    [Pg.165]   
See also in sourсe #XX -- [ Pg.219 ]




SEARCH



Ocean emissions

© 2024 chempedia.info