File:Ship-wave-shape wave clouds induced by the Azores (8805947260).jpg
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The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Terra satellite passed above the North Atlantic Ocean on May 15, 2013, and acquired this true-color image of a complex cloud pattern over the Azores. The image captures at least two layers of clouds – one high aloft and one lower - and each layer is being driven by different winds. The lower layer of clouds interacts with the Azores archipelago – a group of nine volcanic islands located about 930 mi (1500 km) west of Lisbon, Portugal. The Azores are some of the tallest mountains on Earth, with Mount Pico, on the island of Pico, rising to 2,351 m (7,713 feet). Air moving over open ocean flows smoothly, until it encounters an obstacle. When moving air slams against a tall, immobile object, such as an island, the airflow is disrupted. The turbulence created can be written in the clouds. Where the deflected air rises abruptly then falls again, it creates a wave pattern on the lee side of the island, which gradually dissipates. At the top of each wave clouds form, while at the trough, where the air falls and warms, the clouds dissipate, giving rise to a cloud-and-clear pattern. In addition, sharp, tall obstacles can create motion that expands outward from the point of disturbance, and this appears much like the waves that a ship's sharp bow creates in water while moving forward. In this image, at least two broad rows of such ship-wave-shaped clouds can be seen southwest of the Azores. A higher layer of thinner, wispy clouds can be seen streaking from west to east across the image, particularly in the central and southern section, blown by winds that move almost perpendicular to the lower level winds. This higher cloud layer appears brighter white, and in some areas obscures the lower-level clouds lying below. Credit: NASA/GSFC/Jeff Schmaltz/MODIS Land Rapid Response Team NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on Twitter Like us on Facebook Find us on Instagram |
| Date | |
| Source | Ship-wave-shape wave clouds induced by the Azores |
| Author | NASA Goddard Space Flight Center from Greenbelt, MD, USA |
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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/8805947260. It was reviewed on 17 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:05, 17 September 2016 | | 3,000 × 2,200 (1.38 MB) | Vanished Account Byeznhpyxeuztibuo (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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