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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 Darby: Natural Hazards
title
Hurricane Darby: Natural Hazards
title
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description:
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The image above shows Tropical Depression 5E on July 26 before it evolved into Tropical Storm Darby. This daylight image was made with the visible sensor in the AIRS instrument suite. Located in the eastern north Pacific Ocean off the coast of Mexico, Darby is in the upper right-hand corner. Circulation is not apparent because the storm was not organized sufficiently to allow the nascent eye to appear. At this time, winds were approximately 35 mph. In the early morning of July 28th, Darby was upgraded to hurricane status.
About the Movie
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 courtesy airs.jpl.nasa.gov/ AIRS team , NASA JPL
description
The image above shows Tropical Depression 5E on July 26 before it evolved into Tropical Storm Darby. This daylight image was made with the visible sensor in the AIRS instrument suite. Located in the eastern north Pacific Ocean off the coast of Mexico, Darby is in the upper right-hand corner. Circulation is not apparent because the storm was not organized sufficiently to allow the nascent eye to appear. At this time, winds were approximately 35 mph. In the early morning of July 28th, Darby was upgraded to hurricane status.
About the Movie
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 courtesy airs.jpl.nasa.gov/ AIRS team , NASA JPL
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 -- Pacific Ocean
subject
Where -- Pacific Ocean
subject
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subject:
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What -- AIRS
subject
What -- AIRS
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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Pacific Ocean
where
Pacific Ocean
where
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identifier:
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Darby_AIRS_20040726_ 215
identifier
Darby_AIRS_20040726_ 215
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 02:05:29
addeddate
2011-07-25 02:05:29
addeddate
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publicdate:
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2011-07-25 02:05:29
publicdate
2011-07-25 02:05:29
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/Darby_AIRS_200 40726_215/Darby_AIRS _20040726_215_lrg.jp g
ImageUID
file:/home/lunaadmin /Source_download/201 107/1/Darby_AIRS_200 40726_215/Darby_AIRS _20040726_215_lrg.jp g
ImageUID
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filename:
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Darby_AIRS_20040726_ 215_lrg.jpg
filename
Darby_AIRS_20040726_ 215_lrg.jpg
filename
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date:
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2004-07-26
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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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