Discrete Topographic and Orographic Clouds of Mars
Abstract
The Martian atmosphere is very dynamic, exhibiting several types of clouds and hazes easily detected with the aid of color filters and modest-sized telescopes. White water clouds, local yellowish dust clouds, global dust storms, bluish limb hazes, and bright surface ice-fogs and frosts have been studied with increased interest over the past three decades. Observations of these meteorological features indicate their behavior and occurrence are most often coupled with the seasonal sublimation and condensation of polar-cap material. Although the Martian sky appears quite clear, transient bright streaks and oval patches are often observed in its atmosphere that exhibits similar characteristics to clouds and hazes seen in the Earth's atmosphere. Fine dust particles, CO2 and/or H2O hazes and ice crystals are regularly observed in Mars atmosphere using moderate telescopes. From the data gathered by the Mariner and Viking Lander/Orbiter spacecraft, we know that H2O and CO2 condensates do exist in the atmosphere of Mars. We are comfortable with the idea that -- what we observe, as bright patches on Mars are in fact atmospheric clouds, fogs, and/or hazes. In the Earth's atmosphere clouds often form on the windward side of mountains and are classified as Orographic Clouds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1999
- Accession Number
- ADA391942