File:Flooding Resulting From Hurricane Isidore- Comparing data from Sept 12 and 28, 2002 (8490173392).jpg
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[edit]DescriptionFlooding Resulting From Hurricane Isidore- Comparing data from Sept 12 and 28, 2002 (8490173392).jpg |
English: Tropical Storm Isidore was born in mid-September north of Venezuela. It subsequently hit Mexico's Yucatan Peninsula as a Category 3 hurricane and came ashore near New Orleans on September 26th packing winds just below hurricane strength. Around the time of September 27, 2002, the storm was downgraded to a tropical depression as the system moved into Tennessee.
At the time the Aqua spacecraft first passed over Isidore, it was classified as a Category 3 (possibly 4) hurricane, with minimum pressure of 934 mbar, maximum sustained wind speeds of 110 knots gusting to 135 knots, and an eye diameter of 20 nautical miles. Isidore was later downgraded to a Tropical Storm and then a Tropical Depression as it lost energy. In figures 1 and 2, two images from the National Oceanic and Atmospheric Administration's Geostationary Operational Environmental Satellites show no significant weather systems over the southeastern United States on September 12 and September 28 (16 days apart). However, the microwave component of the Atmospheric Infrared Sounder Experiment on NASA's Aqua spacecraft shows a striking difference. The difference in the two microwave images (figures 3 and 4) from the AIRS Advanced Microwave Sounding Unit is primarily due to flooding after Tropical Storm Isidore. Water has a very low surface emissivity at this frequency, and that causes surface water to appear very cold (even though it is not). Land appears relatively warm (well above freezing - 273 K, even at night as seen is these images), but if there is standing water, the apparent temperature drops precipitously. Figure 4, taken just about a day after the remnants of Isidore passed over the southeast, shows heavy flooding along the Mississippi, especially in the states of Mississippi and Tennessee, but other states are also affected. The spatial resolution of the AMSU-A instrument is relatively large (each measurement spot is about 25 miles in diameter at the center of the swath), but the enormous thermal contrast in the microwave between land and water makes even small flooded areas stand out. View a difference image made from this same data: Flooding Resulting From Hurricane Isidore: Difference image, Sept 12 and 28, 2002 ______________________________________________________________________ About AIRS The Atmospheric Infrared Sounder, AIRS, in conjunction with the Advanced Microwave Sounding Unit, AMSU, sense emitted infrared and microwave radiation from the Earth to provide a three-dimensional look at Earth's weather and climate. Working in tandem, the two instruments make simultaneous observations all the way down to the Earth's surface, even in the presence of heavy clouds. With more than 2,000 channels sensing different regions of the atmosphere, the system creates a global, 3-dimensional map of atmospheric temperature and humidity, cloud amounts and heights, greenhouse gas concentrations, and many other atmospheric phenomena. The AIRS and AMSU fly onboard NASA's Aqua spacecraft and are managed by the Jet Propulsion Laboratory, Pasadena, California, under contract to NASA. JPL is a division of the California Institute of Technology in Pasadena. Credit NASA/JPL AIRS Project Download the image Various sizes of the image are available, and there are two ways to download: 1) Right-click on the image. Click on a size next to "View all sizes". 2) Click on the "Actions" menu located above the image. Select "View all sizes". Resources Flooding Resulting From Hurricane Isidore: Difference image, Sept 12 and 28, 2002Atmospheric Infrared Sounder web site › How to get the AIRS data Data Products › Data Portals › Documentation › |
Date | Taken on 19 February 2013, 11:38:59 |
Source | Flooding Resulting From Hurricane Isidore: Comparing data from Sept 12 and 28, 2002 |
Author | Atmospheric Infrared Sounder |
Flickr set InfoField | Flood |
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This image was originally posted to Flickr by Atmospheric Infrared Sounder at https://flickr.com/photos/90896682@N06/8490173392. It was reviewed on 7 October 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 October 2023
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current | 19:44, 7 October 2023 | 1,600 × 1,360 (1.23 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://live.staticflickr.com/8514/8490173392_df9faa170f_o.jpg via Commons:Spacemedia |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 11:38, 19 February 2013 |
Color space | sRGB |
Image width | 1,600 px |
Image height | 1,360 px |
Date and time of digitizing | 03:38, 19 February 2013 |
Date metadata was last modified | 03:38, 19 February 2013 |