ocr: 09 or Climatic variation MARS: SENERAL INFORMATION Based on variations in the ellipticity of Mars's orbit AMSS SATELLITES (in other words, how: far the orbit deviates from a true circle) and the tilt of its axis, scientists have simulated the climatic variations that the planet may have undergone over the ages. They conclude that every 1.2 million years, the atmospheric pressure varies from I to 40 millibars, with heavy variations every 100,000 years. A severe drop in pressure would result in all the atmospheric carbon dioxide freezing at the polar caps and virtually eliminate the planet's atm ...
