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collection:
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nasa new
collection
nasa new
collection
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mediatype:
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image
mediatype
image
mediatype
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collection:
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nasa
collection
nasa
collection
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collection:
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nasanaturalhazards
collection
nasanaturalhazards
collection
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title:
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Hurricane Alex: Natural Hazards
title
Hurricane Alex: Natural Hazards
title
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description:
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This image and movie of Tropical Storm Alex was made with the infrared sensor in the AIRS instrument suite on August 2, 2004. Located in the Atlantic Ocean located about 80 miles south-southeast of Charleston, South Carolina, the storm is moving in a north/northeast path at 5 knots (6 mph). At the time of this observation, the storm had a maximum sustained wind speed of 35 knots (40 mph) with gusts to 45 knots (52 mph).
The major contribution to radiation (infrared light) that AIRS infrared channels sense comes from different levels in the atmosphere, depending upon the channel wavelength. To create the movies, a set of AIRS infrared channels were selected which probe the atmosphere at progressively deeper levels. If there were no clouds, the color in each frame would be nearly uniform until the Earth's surface is encountered. The tropospheric air temperature warms at a rate of 6 K (about 11 F) for each kilometer of descent toward the surface. Thus the colors would gradually change from cold to warm as the movie progresses.
Clouds block the infrared radiation. Thus wherever there are clouds we can penetrate no deeper in infrared. The color remains fixed as the movie progresses, for that area of the image is ''stuck'' to the cloud top temperature. The coldest temperatures around 220 K (about -65 F) come from altitudes of about 10 miles.
We therefore see in a 'surface channel' at the end of the movie, signals from clouds as cold as 220 K and from Earth's surface at 310 K (about 100 F). The very coldest clouds are seen in deep convection thunderstorms over land.
Image and movie courtesy of the airs.jpl.nasa.gov/ AIRS Science Team at the Jet Propulsion Laboratory.
description
This image and movie of Tropical Storm Alex was made with the infrared sensor in the AIRS instrument suite on August 2, 2004. Located in the Atlantic Ocean located about 80 miles south-southeast of Charleston, South Carolina, the storm is moving in a north/northeast path at 5 knots (6 mph). At the time of this observation, the storm had a maximum sustained wind speed of 35 knots (40 mph) with gusts to 45 knots (52 mph).
The major contribution to radiation (infrared light) that AIRS infrared channels sense comes from different levels in the atmosphere, depending upon the channel wavelength. To create the movies, a set of AIRS infrared channels were selected which probe the atmosphere at progressively deeper levels. If there were no clouds, the color in each frame would be nearly uniform until the Earth's surface is encountered. The tropospheric air temperature warms at a rate of 6 K (about 11 F) for each kilometer of descent toward the surface. Thus the colors would gradually change from cold to warm as the movie progresses.
Clouds block the infrared radiation. Thus wherever there are clouds we can penetrate no deeper in infrared. The color remains fixed as the movie progresses, for that area of the image is ''stuck'' to the cloud top temperature. The coldest temperatures around 220 K (about -65 F) come from altitudes of about 10 miles.
We therefore see in a 'surface channel' at the end of the movie, signals from clouds as cold as 220 K and from Earth's surface at 310 K (about 100 F). The very coldest clouds are seen in deep convection thunderstorms over land.
Image and movie courtesy of the airs.jpl.nasa.gov/ AIRS Science Team at the Jet Propulsion Laboratory.
description
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subject:
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Where -- Jet Propulsion Laboratory (JPL)
subject
Where -- Jet Propulsion Laboratory (JPL)
subject
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subject:
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Where -- Atlantic Ocean
subject
Where -- Atlantic Ocean
subject
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subject:
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What -- AIRS
subject
What -- AIRS
subject
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subject:
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Where -- South Carolina
subject
Where -- South Carolina
subject
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subject:
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Where -- Charleston
subject
Where -- Charleston
subject
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what:
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AIRS
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where:
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Jet Propulsion Laboratory (JPL)
where
Jet Propulsion Laboratory (JPL)
where
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where:
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Atlantic Ocean
where
Atlantic Ocean
where
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where:
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South Carolina
where
South Carolina
where
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where:
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Charleston
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identifier:
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Alex_AIRS2004215
identifier
Alex_AIRS2004215
identifier
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uploader:
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gwilliam@archive.org
uploader
gwilliam@archive.org
uploader
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addeddate:
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2011-07-25 03:01:40
addeddate
2011-07-25 03:01:40
addeddate
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publicdate:
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2011-07-25 03:01:40
publicdate
2011-07-25 03:01:40
publicdate
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creator:
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NASA -- NASA Image Of The Day
creator
NASA -- NASA Image Of The Day
creator
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ImageUID:
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file:/home/lunaadmin /Source_download/201 107/1/Alex_AIRS20042 15/Alex_AIRS2004215_ lrg.jpg
ImageUID
file:/home/lunaadmin /Source_download/201 107/1/Alex_AIRS20042 15/Alex_AIRS2004215_ lrg.jpg
ImageUID
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filename:
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Alex_AIRS2004215_lrg .jpg
filename
Alex_AIRS2004215_lrg .jpg
filename
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date:
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2004-08-02
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rights:
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Public Domain
rights
Public Domain
rights
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source:
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year:
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2004
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language:
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eng
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