Open AccessMars’ Background Free Oscillations
Author(s) -
Yasuhiro Nishikawa,
Philippe Logné,
Taïchi Kawamura,
Aymeric Spiga,
É. Stutzmann,
Martín Schimmel,
Tanguy Bertrand,
F. Forget,
Kei Kurita
Publication year - 2019
Publication title -
space science reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.474
H-Index - 160
eISSN - 1572-9672
pISSN - 0038-6308
DOI - 10.1007/s11214-019-0579-9
Subject(s) - martian , mars exploration program , atmosphere of mars , planet , atmosphere (unit) , atmospheric circulation , physics , geophysics , astrobiology , geology , environmental science , atmospheric sciences , meteorology , astrophysics
Observations and inversion of the eigenfrequencies of free oscillations constitute powerful tools to investigate the internal structure of a planet. On Mars, such free oscillations can be excited by atmospheric pressure and wind stresses from the Martian atmosphere, analogous to what occurs on Earth. Over long periods and on a global scale, this phenomenon may continuously excite Mars’ background free oscillations (MBFs), which constitute the so-called Martian hum. However, the source exciting MBFs is related both to the global-scale atmospheric circulation on Mars and to the variations in pressure and wind at the planetary boundary layer, for which no data are available.
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