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A user with 112 edits. Account created on 3 March 2020.
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6 March 2026

  • 18:2018:20, 6 March 2026 diff hist +181 N File:Mcdonald weatherwise 1963 Page 2.jpg Dr. James E. McDonald, Institute of Atmospheric Physics, University of Arizona, Tucson Cloud-Ring in the Upper Stratosphere— Weatherwise magazine, June 1963, Page 2 current
  • 18:1918:19, 6 March 2026 diff hist +181 N File:Mcdonald weatherwise 1963 Page1.jpg Dr. James E. McDonald, Institute of Atmospheric Physics, University of Arizona, Tucson Cloud-Ring in the Upper Stratosphere— Weatherwise magazine, June 1963, Page 1 current
  • 00:3300:33, 6 March 2026 diff hist +566 N File:Two Circular Clouds 1963.jpg This photograph, part of James E. McDonald's 1963 investigation, clearly shows two distinct circular cloud features over the Flagstaff, Arizona area on February 28, 1963. The larger, brighter ring is the main structure documented at approximately 43 km altitude. Below and behind it (in the distance) is a fainter, trailing ring or puff-like formation, identified by McDonald as a separate "smoke ring" at roughly 26 km altitude. This image is one of many multi-angle photos McDonald used to perfo... current

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