Periodic Insolation Variations on Mars

Periodic Insolation Variations on Mars

Previously unrecognized insolation variations on Mars are a consequence of periodic variations in eccentricity, first established by the theory of Brouwer and Van Woerkom (1950). Such annual insolation variations, characterized by both 95,000-year and 2,000,000-year periodicities, may actually be re...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1973-05, Vol.180 (4086), p.638-640
Hauptverfasser: Murray, Bruce C., Ward, William R., Yeung, Sze C.
Format: Artikel
Sprache:eng
Schlagworte:
Axial tilt
Insolation
Mars
Murine leukemia virus
Numerical eccentricity
Perihelions
Planetary meteorology
Planetary orbits
Planets
Viruses
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Zusammenfassung:Previously unrecognized insolation variations on Mars are a consequence of periodic variations in eccentricity, first established by the theory of Brouwer and Van Woerkom (1950). Such annual insolation variations, characterized by both 95,000-year and 2,000,000-year periodicities, may actually be recorded in newly discovered layered deposits in the polar regions of Mars. An additional north-south variation in seasonal insolation, but not average annual insolation, exists with 51,000-year and 2,000,000-year periodicities.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.180.4086.638