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Hurricane Earl Multi-level Winds
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Hurricane Earl Multi-level Winds
09/02/2010

The Multi-angle Imaging SpectroRadiometer (MISR) instrument on NASA's Terra spacecraft captured this image of Hurricane Earl at 15:00 UTC on Aug. 30, 2010. At this time, Hurricane Earl was a Category 3 storm on the Saffir-Simpson scale. The image (left panel) extends approximately 1,110 kilometers (690 miles) in the north-south direction and 380 kilometers (236 miles) in the east-west direction. The hurricane's eye is just visible on the right edge of the MISR image swath.

Winds at various altitudes were obtained by processing the data from five of MISR's nine cameras to produce the display shown on the right. The lengths of the arrows indicate the wind speeds and their orientation shows wind direction. The altitude of a given wind vector is shown in color. Low clouds, less than 4 kilometers (2.5 miles) in altitude (shown in purple), follow the cyclonic (counter-clockwise) flow of air into the hurricane. This warm, moist air is the power source for the hurricane. Mid- and high-level clouds (green and yellow-orange, respectively) move in an anti-cyclonic (clockwise) direction as they flow out from the top of the storm. The very highest clouds with altitudes around 17 kilometers (10.6 miles) are flowing directly away from the eye of the hurricane.

These data were acquired during Terra orbit 56914.

MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Science Mission Directorate, Washington, D.C. Terra is managed by NASA's Goddard Space Flight Center, Greenbelt, Md.

Credit: NASA/GSFC/LaRC/JPL, MISR Team.

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