NASAのインスタグラム(nasa) - 12月12日 00時45分

Cloud Towers - In a view from high altitude, height can be a difficult thing to gauge. The highest of clouds can appear to sit on a flat plane, as if they were at the same elevation as the ocean or land surface. In this image, however, texture, shape and shadows lend definition to mushrooming thunderheads over the Indonesian island of Flores. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite acquired this image on the afternoon of Dec. 2, 2013.
During the day, sunlight heats the land more quickly than it heats the ocean. The warm air over land rises, creating an area of low pressure that pulls in cool air from the ocean. The result is a sea breeze. On this Indonesia island, the sea breeze from the Flores Sea on the north blows inland and clashes with the sea breeze blowing inland from the Savu Sea in the south. When the two breezes meet in the center of Flores, they push the air up. The rising air cools and condenses into a line of clouds.
Sea breeze convection is not the only force at work here. On Flores, cloud formation has help from the shape of the land. A line of tall volcanoes runs down the spine of the island, and their steep slopes also force air to rise. So, moist ocean air blows inland, hits the mountains and volcanoes and rises with the slope. Above the mountains, the rising air meets the rising sea breeze from the other side, and the upward motion is reinforced.
Image Credit: NASA/Jeff Schmaltz, LANCE/EOSDIS MODIS Rapid Response Team, NASA GSFC
#nasa #space #earth #clouds #wind # breeze # modis #floressea #savusea #indonesia

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