Add to ORKGModels are presented for the past history of nitrogen on Mars based on Viking measurements showing that the atmosphere is enriched in ^(15)N. The enrichment is attributed to selective escape, with fast atoms formed in the exosphere by electron impact dissociation of N_2 and by dissociative recombination of N_2+. The initial partial pressure of N_2 should have been at least as large as several millibars and could have been as large as 30 millibars if surface processes were to represent an important sink for atmospheric HNO_2 and HNO_3
Models are developed for the photochemistry of a CO_2-H_2O-N_2 atmosphere on Mars and estimates are ...
We examine the effects of the loss of Mars atmospheric constituents by solar-wind-induced sputtering...
stitutes only about 2.7 % of a very thin atmo-sphere (9). Isotopic measurements of the mar-tian atmo...
Models are presented for the past history of nitrogen on Mars based on Viking measurements showing t...
We have computed the production rates and densities of odd nitrogen species in the Martian atmospher...
The escape rate of nitrogen from Mars is calculated to be 2.3×105 s−1 for low solar flux conditions ...
Results from the neutral mass spectrometer carried on the aeroshell of Viking 1 show evidence for N...
Viking measurements of the Martian upper atmosphere indicate thermospheric temperatures below 200°K,...
The present Mars atmosphere is relatively thin and cold. It is not at all like that which is presume...
International audienceWe present here a comparative planetology study of evolution of N-14/N-15 at M...
Quantitative calculations of the escape rate of nitrogen by photodissociation and photoionization, b...
atmospheric 14N/15N ratio of 173 ˙ 11 on sol 341 of the mission, agreeing with Viking’s measurement ...
International audienceThe origin and evolution of nitrogen in solar system bodies is an important qu...
Atmospheric nitrogen may be a necessary ingredient for the habitability of a planet as its presence ...
Viking measurements of the Martian atmosphere indicate a value of N-15/N-14 which is markedly greate...
Models are developed for the photochemistry of a CO_2-H_2O-N_2 atmosphere on Mars and estimates are ...
We examine the effects of the loss of Mars atmospheric constituents by solar-wind-induced sputtering...
stitutes only about 2.7 % of a very thin atmo-sphere (9). Isotopic measurements of the mar-tian atmo...
Models are presented for the past history of nitrogen on Mars based on Viking measurements showing t...
We have computed the production rates and densities of odd nitrogen species in the Martian atmospher...
The escape rate of nitrogen from Mars is calculated to be 2.3×105 s−1 for low solar flux conditions ...
Results from the neutral mass spectrometer carried on the aeroshell of Viking 1 show evidence for N...
Viking measurements of the Martian upper atmosphere indicate thermospheric temperatures below 200°K,...
The present Mars atmosphere is relatively thin and cold. It is not at all like that which is presume...
International audienceWe present here a comparative planetology study of evolution of N-14/N-15 at M...
Quantitative calculations of the escape rate of nitrogen by photodissociation and photoionization, b...
atmospheric 14N/15N ratio of 173 ˙ 11 on sol 341 of the mission, agreeing with Viking’s measurement ...
International audienceThe origin and evolution of nitrogen in solar system bodies is an important qu...
Atmospheric nitrogen may be a necessary ingredient for the habitability of a planet as its presence ...
Viking measurements of the Martian atmosphere indicate a value of N-15/N-14 which is markedly greate...
Models are developed for the photochemistry of a CO_2-H_2O-N_2 atmosphere on Mars and estimates are ...
We examine the effects of the loss of Mars atmospheric constituents by solar-wind-induced sputtering...
stitutes only about 2.7 % of a very thin atmo-sphere (9). Isotopic measurements of the mar-tian atmo...