Mars: upper atmosphere.
نویسندگان
چکیده
The thermal structure of the upper atmosphere of Mars has been theoretically investigated. The exospheric temperature, for a pure CO(2) model atmosphere, lies between 400 degrees and 700 degrees K. The origin of the Martian atmosphere is discussed in the light of these results.
منابع مشابه
The Mars Atmosphere and Volatile Evolution (MAVEN) Mission
The MAVEN spacecraft launched in November 2013, arrived at Mars in September 2014, and completed commissioning and began its one-Earth-year primary science mission in November 2014. The orbiter’s science objectives are to explore the interactions of the Sun and the solar wind with the Mars magnetosphere and upper atmosphere, to determine the structure of the upper atmosphere and ionosphere and ...
متن کاملThe importance of pickup oxygen ion precipitation to the Mars upper atmosphere under extreme solar wind conditions
[1] While the Mars upper atmosphere is continuously bombarded by charged particles of solar and planetary origins, the energy flux carried is often not sufficient to significantly affect the neutral atmosphere. However, we show that this is not the case during major space weather events. By applying two Mars global models—a Monte Carlo model for simulating pickup O+ precipitation at the exobase...
متن کاملInterannual Variability of the Mars Thermosphere: New Simulations and Comparisons with Recent Mars Datasets
Detailed studies exist that explore the global, seasonal, and interannual variations of the Martian lower atmosphere (below 90 km) [e.g. Liu et al., 2003]. Key findings indicate that observed temperatures are quite repeatable from one Mars aphelion season to the next. Conversely, perihelion temperatures can change radically on an interannual basis, depending on the timing and intensity of dust ...
متن کاملThe Escape of Oxygen from Mars
This proposal is to perform detailed analysis of STIS observations of the upper atmosphere of Mars, using an ionospheric model, general circulation model results for the neutral atmosphere, and various recent spacecraft observations of Mars. The end goal is to better understand the escape of oxygen, and by extension water, from Mars. The observations have yielded limb profiles of atomic hydroge...
متن کاملInitial results from the MAVEN mission to Mars
The Mars Atmosphere and Volatile EvolutioN (MAVEN) Mars orbiter has been gathering information on the Mars upper atmosphere, ionosphere, and solar and solar wind interactions since its orbit insertion in September 2014. MAVEN’s science goals are to understand processes driving the escape of atmospheric gases to space at the present epoch, and their variations with solar and local heliospheric c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 151 3715 شماره
صفحات -
تاریخ انتشار 1966