保护地球，探索宇宙，发现文明
2023年2月12日 Mammatus Clouds over Nebraska Image Credit & Copyright: Jorn Olsen Photography Explanation: When do cloud bottoms appear like bubbles? Normally, cloud bottoms are flat. This is because moist warm air that rises and cools will condense into water droplets at a specific temperature, which usually corresponds to a very specific height. As water ...
2022年1月16日 A Retreating Thunderstorm at Sunset Image Credit & Copyright: Alan Dyer (The Amazing Sky) Explanation: What type of cloud is that? This retreating cumulonimbus cloud, more commonly called a thundercloud, is somewhat unusual as it contains the unusual bumpiness of a mammatus cloud on the near end, while simultaneously producing falling rain on...
2021年8月11日 Mammatus Clouds over Saskatchewan Image Credit & Copyright: Michael F Johnston Explanation: When do cloud bottoms appear like bubbles? Normally, cloud bottoms are flat. This is because moist warm air that rises and cools will condense into water droplets at a specific temperature, which usually corresponds to a very specific height. As water ...
2020年12月07日 Mammatus Clouds over Mount Rushmore Image Credit & Copyright: Laure Mattuzzi Explanation: What’s that below those strange clouds? Presidents. If you look closely, you may recognize the heads of four former US Presidents carved into famous Mount Rushmore in South Dakota, USA. More obvious in the featured image are the unusual mammatus c...