Sentences with phrase «hydrogen escape»
The phrase "hydrogen escape" refers to the process in which hydrogen gas, found in an atmosphere or a body of water, slowly escapes or leaves its original location. Full definition
Then, sunlight split the water molecules, letting hydrogen escape into space.
sciencemag.org
But he says the argument would be more persuasive if it explained why the crust would have absorbed the excess oxygen produced by hydrogen escape.
The rate of loss varied dramatically overall, with 10 times more hydrogen escaping at the maximum.
«Now that we know such large changes occur, we think of hydrogen escape from Mars less as a slow and steady leak and more as an episodic flow — rising and falling with season and perhaps punctuated by strong bursts,» said Michael Chaffin, a scientist at the University of Colorado at Boulder who is on the Imaging Ultraviolet Spectrograph (IUVS) team.
«Now that we know such large changes occur, we think of hydrogen escape from Mars less as a slow and steady leak and more as an episodic flow — rising and falling with season and perhaps punctuated by strong bursts,» said Michael Chaffin, a scientist at the University of Colorado Boulder's Laboratory for Atmospheric and Space Physics who is on the Imaging Ultraviolet Spectrograph (IUVS) team.
Previous studies have indicated that Mars, which was once covered in an ocean about 100 meters deep, lost the bulk of its water through hydrogen escape (SN Online: 10/15/14).
By investigating hydrogen escape in multiple ways, the MAVEN team will be able to work out which factors drive the escape.
«MAVEN is giving us unprecedented detail about hydrogen escape from the upper atmosphere of Mars, and this is crucial for helping us figure out the total amount of water lost over billions of years,» said Ali Rahmati, a MAVEN team member at the University of California at Berkeley who analyzed data from two of the spacecraft's instruments.
All of the remaining reactors, however, will remain offline until they have been upgraded to meet extended safety requirements, such such as the provision of alternative power supplies, multiple sources of cooling water, back - up control rooms and venting to prevent hydrogen escape.
Sophisticated measurements made by a suite of instruments on the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft revealed the ups and downs of hydrogen escape — and therefore water loss.
Hydrogen escapes faster because it is lighter than deuterium.
Hydrogen escape from Mars enhanced by deep convection in dust storms.
But Catling's team proposes instead that the hydrogen escaped into space through a process called methane photolysis, in which the hydrogen - containing methane reacts with oxygen such that hydrogen atoms are freed.
As the water boiled away, the hydrogen escaped into interstellar space while the oxygen came back down and bonded with carbon atoms.
MAVEN has been tracking the hydrogen escape without interruption over the course of a Martian year, which lasts nearly two Earth years.
As a result, the planet's early ocean evaporated, water - vapor molecules were broken apart by ultraviolet radiation, and hydrogen escaped to space.
Sophisticated measurements made by a suite of instruments on the MAVEN spacecraft revealed the ups and downs of hydrogen escape — and therefore water loss.