Rare Cloud Vortices Captured Above Southern Indian Ocean
A stunning new image has captured 10 twisting “dark voids.” They are above the southern Indian Ocean, about 1,500 kilometers north of Antarctica. These unusual cloud formations are a result of abnormal atmospheric events.
What are Von Kármán Vortices?
- Definition: Spiral clouds that occur in alternating patterns when air flows past an obstacle.
- Formation: The flow divides into two counter-rotating eddies, creating a dramatic mid-stream bend.
- Location: Heard Island, with Mawson Peak, a 2.7 km high volcano, distorting air flow into unusual spiral shapes.
Key Features of the Phenomenon
- Width: Approximately 13 km wide.
- Winds: Powerful westerly winds, known as the “Furious Fifties”, gusting over 80 km/h.
- Cloud Formation: Thick clouds above Heard Island allowed focused vortex centers to penetrate high cloud tops, leaving jagged holes.
Significance of the Event
- Rare Occurrence: Mawson Peak is smaller than many mountains that experience vortices, making this event less common.
- Geography and Weather: The image showcases the complex dance between geography and weather, highlighting how mountains can impact atmospheric patterns