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|
MAP '05 Models Hurricane Kat
…
| Title |
MAP '05 Models Hurricane Katrina's Winds from August 23, 2005 through August 31, 2005 |
| Abstract |
During the summer of 2005, the Earth-Sun Exploration Division of NASA/Goddard Space Flight Center(GSFC) brought together resources from NASA to study tropical cyclones. The MAP '05 Project, so named for its affiliation with NASA's Modeling, Analysis, and Prediction (MAP) program, applies NASA's advanced satellite remote sensing technologies and earth system modeling capabilities to improve our understanding of tropical cyclones that develop in and move across the Atlantic basin. MAP '05 implemented the most recent version of the NASA/Goddard Earth Observing System (GEOS) fifth-generation global atmospheric model and the Gridpoint Statistical Interpolation (GSI) analysis system under development as a collaboration between NOAA's National Centers for Environmental Prediction (NCEP) and the Global Modeling and Assimilation Office (GMAO) at GSFC. This animation displays MAP '05's wind analysis data for every 6 hour interval from August 23 through August 31, 2005. |
| Completed |
2006-05-30 |
|
Hurricane Katrina
| Title |
Hurricane Katrina |
| Description |
Hurricane Katrina had just become a category 1 hurricane when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite captured this image on August 25, 2005, at 12:30 p.m., Eastern Daylight Savings Time. The hurricane formed as a tropical depression late on August 23 and developed quickly into a tropical storm by 11 a.m. the next morning. By the time MODIS acquired this image, the storm had developed into a category 1 hurricane, the lowest category in the hurricane-strength scale. Katrina had winds of 120 kilometers per hour (75 miles per hour). A more serious danger is Katrina's rains. The storm was moving quite slowly as of August 26, just 10 km/hr (6 mph). This means that Katrina's heavy rains will linger longer over one area, dumping 15-25 centimeters (6-10 inches) of rain over Florida and the Bahamas and possibly up to 38 cm (15 inches) in some regions, the National Hurricane Center warns. For more information about the storm, please visit the National Hurricane Center [ http://www.nhc.noaa.gov/ ]. This image is available in multiple resolutions [ http://rapidfire.sci.gsfc.nasa.gov/gallery/?2005237-0825/Katrina.A2005237.1630 ] from the MODIS Rapid Response Team. NASA image courtesy Jeff Schmaltz, MODIS Land Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC |
|
Hurricane Katrina
| Title |
Hurricane Katrina |
| Description |
Tropical Storm Katrina had just become the eleventh named storm of the 2005 Atlantic Hurricane season when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite captured this image on August 24, 2005, at 11:50 a.m., Eastern Daylight Savings Time. The storm formed late on August 23 and developed quickly into a tropical storm by 11 a.m. the next morning. By the time MODIS acquired this image, the storm was just starting to take the recognizable swirling shape of a hurricane. Katrina had winds of 64 kilometers per hour (40 miles per hour) and was expected to get stronger as it approached the south Florida coast, possibly becoming a Category 1 hurricane before coming ashore. A more serious danger is Katrina's rains. The storm is moving slowly, just 13 km/hr (8 mph), and it is expected to slow as it moves over land. This means that Katrina's heavy rains will linger longer over one area, dumping 15-25 centimeters (6-10 inches) of rain over Florida and the Bahamas and possibly up to 38 cm (15 inches) in some regions, the National Hurricane Center warns. For more information about the storm, please visit the National Hurricane Center [ http://www.nhc.noaa.gov/ ]. This image is available in multiple resolutions [ http://rapidfire.sci.gsfc.nasa.gov/gallery/?2005236-0824/Katrina.A2005236.1550 ] from the MODIS Rapid Response Team. NASA image courtesy Jeff Schmaltz, MODIS Land Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC |
|
Hurricane Katrina
| Title |
Hurricane Katrina |
| Description |
Tropical Storm Katrina is shown here as observed by NASA's QuikSCAT satellite on August 25, 2005, at 08:37 UTC (4:37 a.m. in Florida). At this time, the storm had 80-kilometer-per-hour (50 miles per hour, 43 knots) sustained winds. The storm does not appear to yet have reached hurricane strength. The greater danger may be not with her winds, but with Katrina's rains. The storm is moving slowly, just 13 km/hr (8 mph), and is expected to slow as it moves over land. This means that Katrina's heavy rains will linger longer over one area, dumping 15-25 centimeters (6-10 inches) of rain over Florida and the Bahamas and possibly up to 38 cm (15 inches) in some regions, the National Hurricane Center warns. The image depicts wind speed in color and wind direction with small barbs. White barbs point to areas of heavy rain. The highest wind speeds, shown in purple, surround the center of the storm. Measurements of the wind strength of Tropical Storm Katrina show sustained winds similar to those shown by these QuikSCAT observations, though not identical. This is because the power of the storm makes accurate measurements difficult. The scatterometer sends pulses of microwave energy through the atmosphere to the ocean surface, and measures the energy that bounces back from the wind-roughened surface. The energy of the microwave pulses changes depending on wind speed and direction, giving scientists a way to monitor wind around the world. Tropical cyclones (the generic term for hurricanes and typhoons) and to a lesser extent, weaker storm systems like Katrina, are difficult to measure. To relate the radar energy return to actual wind speed, scientists compare measurements taken from buoys and other ground stations to data the satellite acquired at the same time and place. Because the high wind speeds generated by cyclones are rare, scientists do not have corresponding ground information to know how to translate data from the satellite for wind speeds above 50 knots (about 93 km/hr or 58 mph). Also, the unusually heavy rain found in a cyclone distorts the microwave pulses in a number of ways, making a conversion to accurate wind speed difficult. Instead, the scatterometer provides a nice picture of the relative wind speeds within the storm and shows wind direction. For more information about the storm, please visit the National Hurricane Center [ http://www.nhc.noaa.gov/ ]. NASA image courtesy the QuikSCAT Science Team at the Jet Propulsion Laboratory |
|
Hurricane Ophelia
| Title |
Hurricane Ophelia |
| Description |
Over the second week of September, Ophelia meandered off of the southeast coast of the United States due to weak steering currents. The system, which began as a depression over the Bahamas on September 6, 2005, twice stalled out and made loops: once just east of Cape Canveral, Florida, and the other farther out to sea east of Georgia. Ophelia also flip-flopped several times between a strong tropical storm and a weak Category 1 hurricane. Despite its very slow movement, which usually leads to weakening due to upwelling of cooler water, Ophelia has maintained itself as a result of warm waters and its proximity to the Gulf Stream. The Tropical Rainfall Measuring Mission (or TRMM) satellite has been following Ophelia's progress along the East Coast. This image shows the height of the precipitation columns within Ophelia with a cutaway view through the southern part of the eye. The large eye is easily visible in the center along with the area of intense rain in the southwest corner of the eye (dark red area). However, there are no tall towers surrounding the eye that might indicate imminent strengthening. Launched in 1997 to measure rainfall over the tropics, TRMM has proven to be a valuable tool for monitoring and studying tropical cyclones. TRMM's compliment of instruments includes the TRMM Precipitation Radar (PR), the only radar capable of measuring precipitation from space, and the TRMM Microwave Imager (TMI), a passive intrument that can also measure rainfall. TRMM is a joint mission between NASA and the Japanese space agency JAXA. Images produced by Hal Pierce (SSAI/NASA GSFC) and caption by Steve Lang (SSAI/NASA GSFC). |
|
Hurricane Ophelia
| Title |
Hurricane Ophelia |
| Description |
Over the last several days, Ophelia has meandered off of the southeast coast of the United States. The storm system, which began as a depression over the Bahamas on September 6, 2005, has twice stalled out and made loops: once just east of Cape Canveral, Florida, and the other farther out to sea east of Georgia. Ophelia has also flip-flopped several times between a strong tropical storm and a weak Category 1 hurricane. Despite its very slow movement, which usually leads to weakening due to upwelling of cooler water, Ophelia has maintained itself as a result of warm waters an its proximity to the Gulf Stream. The hurricane was grazing along the North Carolina coastline without making landfall when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Aqua [ http://aqua.nasa.gov/ ] satellite captured this image at 2:20 p.m. Eastern time on September 15, 2005. At the time, Ophelia had winds of 120 kilometers per hour (75 miles per hour), easing off slightly from its latest peak and heading back down yet again to tropical storm status. The slow-moving storm was initially forecasted to dump heavy rain on the Outer Banks of North Carolina, but proved less destructive than feared. One death (due to a car accident in Raleigh attributed to slick roads) has been attributed to the storm, but fears of substantial flooding have largely not been realized. The large image provided above has a resolution of 250 meters per pixel. The image is available in additional resolutions from the MODIS Rapid Response Team. NASA image courtesy Jeff Schmaltz, MODIS Land Rapid Response Team at NASA GSFC |
|
Hurricane Rita
| Title |
Hurricane Rita |
| Description |
A tropical depression formed in the Bahamas on September 17, 2005. Once it was organized enough to have winds of over 62 kilometers per hour (39 miles per hour), it was classified as a tropical storm and given the name Rita, becoming the 17th named storm system of the 2005 hurricane season. With the season not yet over, 2005 is already the 5th most active storm season since naming records were started in 1851. According to the National Hurricane Center, 21 tropical storms formed in 1933, 19 developed in 1995 and 1887, and 18 formed in 1969. Rita is also the earliest "R" named storm in a season. Rita crossed the threshold to tropical storm status around 5:00 p.m. (local time) on September 18, 2005. The Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite captured this image of Rita roughly fives hours earlier at 11:40 a.m. while the storm was still an organizing tropical depression. The classical spiral structure of a hurricane is not yet fully formed, nor is there a well-organized eye of the storm, but these nascent features of the developing system are apparent already. Forecasters are particularly concerned about Rita as it is projected to pass through the Florida Key Islands as it reaches hurricane strength. The storm track projections as of September 19 have it crossing the Gulf of Mexico to make landfall in the general vicinity of southern Texas, but forecasting hurricanes several days in advance is still an uncertain science and there are fears that Rita could turn in the Gulf and head into areas recently battered by Katrina. NASA image created by Jesse Allen, Earth Observatory, using data obtained courtesy of the MODIS Rapid Response team. |
|
Hurricane Rita
| Title |
Hurricane Rita |
| Description |
After the immense devastation brought by Hurricane Katrina, all eyes were on Hurricane Rita as it passed over the Florida Keys and the Gulf of Mexico. Rita formed from a tropical disturbance east of the Turks and Caicos Islands into a depression (TD #18) on September 17, 2005. The system moved west through the Caicos and strengthened into a tropical storm on the 18th before entering into the southern Bahamas. Category 2 Hurricane Rita was passing between the Florida Keys and Cuba when the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Aqua [ http://aqua.nasa.gov/ ] satellite captured this image at 2:35 p.m. Eastern time on September 20, 2005. At the time, Rita had peak sustained winds of 160 kilometers per hour (100 miles per hour), with hurricane-strength winds extending well away from the storm's center, including settlements in the Key Islands and in Cuba's capital, Havana. The large image provided above has a resolution of 250 meters per pixel. The image is available in additional resolutions from the MODIS Rapid Response Team. NASA image courtesy Jeff Schmaltz, MODIS Land Rapid Response Team at NASA GSFC. |
|
Hurricane Rita
| Title |
Hurricane Rita |
| Description |
After the immense devastation brought by Hurricane Katrina, all eyes were on Hurricane Rita as it passed over the Florida Keys and the Gulf of Mexico. Rita formed from a tropical disturbance east of the Turks and Caicos Islands into a depression (TD #18) on September 17, 2005. The system moved west through the Caicos and strengthened into a tropical storm on the 18th before entering into the southern Bahamas. This image shows the horizontal distribution of rain intensity within Rita measured by the Tropical Rainfall Measuring Mission's (TRMM) sensors. Rain rates in the center part of the swath are from the TRMM Precipitation Radar (PR), the only radar capable of measuring precipitation from space. The PR can provide fine-resolution rainfall data and details on the vertical structure of the storm. Rain rates in the outer swath are from the TRMM Microwave Imager (TMI). The rain rates are overlaid on infrared (IR) data from the TRMM Visible Infrared Scanner (VIRS). The image was taken at 08:28 UTC (4:28 a.m. EDT) on September 20 as Rita was passing through the Florida Straits. Although the center of Rita does not fall within the PR swath, it is obvious from TRMM that Rita is becoming better organized. A ragged eye is present, surrounded by areas of moderate rain (green areas) with good banding in the outer rainbands, all signs that the storm's circulation is improving. Rita was still a tropical storm at the time of this image, with sustained winds of 110 kilometers per hour (70 miles per hour). By early afternoon the same day, Rita would become a Category 2 hurricane as it passed south of the Florida Keys and headed for the Gulf of Mexico. The TRMM satellite is one of a number of satellites being used to monitor Hurricane Rita and storms like it. Launched in November of 1997 to measure rainfall over the tropics, TRMM has proven itself to be a valuable platform for observing tropical cyclones, which include hurricanes and typhoons. TRMM is a joint mission between NASA and the Japanese space agency JAXA. Images produced by Hal Pierce (SSAI/NASA GSFC) and caption by Steve Lang (SSAI/NASA GSFC). |
|
Tropical Storm Adrian
| Title |
Tropical Storm Adrian |
| Description |
Tropical Storm Adrian is developing and moving steadily closer to the west coast of Central America. The storm is the first of the 2005 Pacific hurricane season, which runs from May 15 to November 30, and it has the potential to inundate Guatemala, El Salvador, and Honduras with heavy rains. These mountainous regions are prone to mudslides and flash floods. Adrian is not a powerful storm, but it has continued to intensify since it formed on May 17. The National Hurricane Center [ http://www.nhc.noaa.gov/ ] predicts that the storm may become a weak hurricane before it makes landfall late on May 19 or early on May 20. This image of Tropical Storm Adrian was taken on May 19, 2005, by one of the GOES satellites. The GOES sensors maintain a constant watch over a particular section of the Earth to provide important weather information. As such, the GOES satellite can watch the development of the storm. The animation provided above shows the storm as it became more and more organized on May 18. When it blows ashore, Adrian will become only the fifth tropical cyclone to make landfall over Guatemala or El Salvador since 1966, according to the National Hurricane Center. Of those storms, none has ever crossed Central America this early in May, making Adrian unusual. Even more unusual than the timing of this storm is its path. Typically, hurricanes that form in the Eastern Pacific curve west to dissipate over the ocean, or they may move north into Mexico. Adrian is moving east and is expected to make landfall over El Salvador and Guatemala on May 19 or May 20. Its path is predicted to take it over the same region that was devastated by Hurricane Mitch in 1998. Unlike Adrian, Mitch formed in the Atlantic and crossed this section of Central America from the east. If Adrian survives its encounter with the high mountains of Central America, it could re-emerge in the Caribbean and move over Cuba and the Bahamas. While storms occasionally cross from the Atlantic into the Pacific, it is extremely rare for a storm to move into the Atlantic from the Pacific, however. Image courtesy GOES Project Science [ http://meso-a.gsfc.nasa.gov/goes/ ] at NASA Goddard Space Flight Center, data from NOAA-GOES, animation by Rob Simmon, NASA Earth Observatory |
|
Tropical Storm Adrian
| Title |
Tropical Storm Adrian |
| Description |
Tropical Storm Adrian is developing and moving steadily closer to the west coast of Central America. The storm is the first of the 2005 Pacific hurricane season, which runs from May 15 to November 30, and it has the potential to inundate Guatemala, El Salvador, and Honduras with heavy rains. These mountainous regions are prone to mudslides and flash floods. Adrian is not a powerful storm, but it has continued to intensify since it formed on May 17. The National Hurricane Center [ http://www.nhc.noaa.gov/ ] predicts that the storm may become a weak hurricane before it makes landfall late on May 19 or early on May 20. This image of Tropical Storm Adrian was taken on May 19, 2005, by one of the GOES satellites. The GOES sensors maintain a constant watch over a particular section of the Earth to provide important weather information. As such, the GOES satellite can watch the development of the storm. The animation provided above shows the storm as it became more and more organized on May 18. When it blows ashore, Adrian will become only the fifth tropical cyclone to make landfall over Guatemala or El Salvador since 1966, according to the National Hurricane Center. Of those storms, none has ever crossed Central America this early in May, making Adrian unusual. Even more unusual than the timing of this storm is its path. Typically, hurricanes that form in the Eastern Pacific curve west to dissipate over the ocean, or they may move north into Mexico. Adrian is moving east and is expected to make landfall over El Salvador and Guatemala on May 19 or May 20. Its path is predicted to take it over the same region that was devastated by Hurricane Mitch in 1998. Unlike Adrian, Mitch formed in the Atlantic and crossed this section of Central America from the east. If Adrian survives its encounter with the high mountains of Central America, it could re-emerge in the Caribbean and move over Cuba and the Bahamas. While storms occasionally cross from the Atlantic into the Pacific, it is extremely rare for a storm to move into the Atlantic from the Pacific, however. Image courtesy GOES Project Science [ http://meso-a.gsfc.nasa.gov/goes/ ] at NASA Goddard Space Flight Center, data from NOAA-GOES, animation by Rob Simmon, NASA Earth Observatory |
|
Tropical Storm Adrian
| Title |
Tropical Storm Adrian |
| Description |
Only four tropical cyclones have made landfall over Guatemala or El Salvador since 1966: Tropical Storm Adrian is about to become the fifth. Adrian is the first tropical storm of the 2005 Pacific hurricane season, which officially runs from May 15 through November 30. Adrian formed on May 17, 2005, making it a slightly unusual, early-season storm. No tropical cyclone has crossed Central America this early in May since records began, reports the National Hurricane Center [ http://www.nhc.noaa.gov/ ]. Even more unusual than the timing of this storm is its path. Typically, hurricanes that form in the Eastern Pacific curve west to dissipate over the ocean, or they may move north into Mexico. Adrian is moving east and is expected to make landfall over El Salvador and Guatemala on May 19. Its path is predicted to take it over the same region that was devastated by Hurricane Mitch in 1998. Unlike Adrian, Mitch formed in the Atlantic and crossed this section of Central America from the east. If Adrian survives its encounter with the high mountains of Central America, it could re-emerge in the Caribbean and move over Cuba and the Bahamas. While storms occasionally cross from the Atlantic into the Pacific, it is extremely rare for a storm to move into the Atlantic from the Pacific, however. Tropical Depression Adrian formed in the afternoon of May 17. By evening, the storm had intensified into a weak tropical storm, and it continued to intensify through the night. It was during this intensification period that the Tropical Rainfall Measuring Mission (TRMM [ http://trmm.gsfc.nasa.gov ]) captured this image of Adrian on May 18 at 3:22 a.m. local time (09:22 UTC). A dark band of red clouds curves around a nearly closed eye in the center of the image. The red?indicative of high rain rates?traces out a convective burst, an area of intense thunderstorms near the core. TRMM research shows that when thunderstorms such as these appear around the core, the likelihood of intensification goes up. Adrian was in fact intensifying when TRMM captured this image, making this a valuable picture of the genesis of a storm. The semi-circle of heavy rain also helped researchers identify the center of the storm early in its development. Without TRMM?s precipitation radar, the storm would simply be an amorphous blob, with no clearly defined center. The National Hurricane Center predicts that Adrian will continue to intensify, possibly into a weak hurricane, before striking the coast of Central America on May 19. Unusually warm waters?as warm as 30 degrees Celsius (86 Fahrenheit)?are feeding the storm. Adrian has the potential to unleash heavy rains and floods on the mudslide-prone, mountainous coastal region.TRMM [ http://trmm.gsfc.nasa.gov/ ] is a joint mission between NASA and the Japanese space agency JAXA. NASA image courtesy Hal Pierce (SSAI/NASA GSFC) and caption information courtesy Jeff Halverson and Steve Lang. |
|
Tropical Storm Adrian
| Title |
Tropical Storm Adrian |
| Description |
Only four tropical cyclones have made landfall over Guatemala or El Salvador since 1966: Tropical Storm Adrian is about to become the fifth. Adrian is the first tropical storm of the 2005 Pacific hurricane season, which officially runs from May 15 through November 30. Adrian formed on May 17, 2005, making it a slightly unusual, early-season storm. No tropical cyclone has crossed Central America this early in May since records began, reports the National Hurricane Center [ http://www.nhc.noaa.gov/ ]. Even more unusual than the timing of this storm is its path. Typically, hurricanes that form in the Eastern Pacific curve west to dissipate over the ocean, or they may move north into Mexico. Adrian is moving east and is expected to make landfall over El Salvador and Guatemala on May 19. Its path is predicted to take it over the same region that was devastated by Hurricane Mitch in 1998. Unlike Adrian, Mitch formed in the Atlantic and crossed this section of Central America from the east. If Adrian survives its encounter with the high mountains of Central America, it could re-emerge in the Caribbean and move over Cuba and the Bahamas. While storms occasionally cross from the Atlantic into the Pacific, it is extremely rare for a storm to move into the Atlantic from the Pacific, however. Tropical Depression Adrian formed in the afternoon of May 17. By evening, the storm had intensified into a weak tropical storm, and it continued to intensify through the night. It was during this intensification period that the Tropical Rainfall Measuring Mission (TRMM [ http://trmm.gsfc.nasa.gov ]) captured this image of Adrian on May 18 at 3:22 a.m. local time (09:22 UTC). A dark band of red clouds curves around a nearly closed eye in the center of the image. The red?indicative of high rain rates?traces out a convective burst, an area of intense thunderstorms near the core. TRMM research shows that when thunderstorms such as these appear around the core, the likelihood of intensification goes up. Adrian was in fact intensifying when TRMM captured this image, making this a valuable picture of the genesis of a storm. The semi-circle of heavy rain also helped researchers identify the center of the storm early in its development. Without TRMM?s precipitation radar, the storm would simply be an amorphous blob, with no clearly defined center. The National Hurricane Center predicts that Adrian will continue to intensify, possibly into a weak hurricane, before striking the coast of Central America on May 19. Unusually warm waters?as warm as 30 degrees Celsius (86 Fahrenheit)?are feeding the storm. Adrian has the potential to unleash heavy rains and floods on the mudslide-prone, mountainous coastal region.TRMM [ http://trmm.gsfc.nasa.gov/ ] is a joint mission between NASA and the Japanese space agency JAXA. NASA image courtesy Hal Pierce (SSAI/NASA GSFC) and caption information courtesy Jeff Halverson and Steve Lang. |
|
Tropical Storm Adrian: Natur
…
nasa, nasanaturalhazards
Tropical Storm Adrian is dev
…
Adrian_GOES_2005139
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-05-19 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
Adrian_GOES_2005139 |
|
Hurricane Katrina: Natural H
…
nasa, nasanaturalhazards
A more serious danger is Kat
…
Katrina.A2005236.1550
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-08-24 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
Katrina.A2005236.1550 |
|
Hurricane Katrina: Natural H
…
nasa, nasanaturalhazards
* eoimages.gsfc.nasa.gov/ima
…
katrina_trmm_23-31aug05
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-08-31 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
katrina_trmm_23-31aug05 |
|
Tropical Storm Adrian: Natur
…
nasa, nasanaturalhazards
Only four tropical cyclones
…
ADRIAN2_TRM_2005138
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-05-18 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ADRIAN2_TRM_2005138 |
|
Tropical Storm Adrian: Natur
…
nasa, nasanaturalhazards
Only four tropical cyclones
…
ADRIAN2_TRM_2005138
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-05-18 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ADRIAN2_TRM_2005138 |
|
Hurricane Rita: Natural Haza
…
nasa, nasanaturalhazards
A tropical depression formed
…
rita_tmo_18sep05
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-09-18 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
rita_tmo_18sep05 |
|
Hurricane Ophelia: Natural H
…
nasa, nasanaturalhazards
Over the second week of Sept
…
ophelia_trmm_14sep05
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-09-14 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
ophelia_trmm_14sep05 |
|
Hurricane Katrina: Natural H
…
nasa, nasanaturalhazards
A more serious danger is Kat
…
Katrina.A2005237.1630
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-08-25 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
Katrina.A2005237.1630 |
|
Hurricane Katrina: Natural H
…
nasa, nasanaturalhazards
The greater danger may be no
…
katrina_qscat_25aug05
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2005-08-25 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
katrina_qscat_25aug05 |
|
Tropical Storm Katrina
PIA07432
Sol (our sun)
SeaWinds Scatterometer
| Title |
Tropical Storm Katrina |
| Original Caption Released with Image |
. QuikScat is managed for NASA's Science Mission Directorate, Washington, DC, by NASA's Jet Propulsion Laboratory, Pasadena, CA. JPL also built the SeaWinds radar instrument and is providing ground science processing systems. NASA's Goddard Space Flight Center, Greenbelt, MD, managed development of the satellite, designed and built by Ball Aerospace & Technologies Corp., Boulder, CO. The National Oceanic and Atmospheric Administration has contributed support to ground systems processing and related activities., Tropical Storm Katrina is shown here as observed by NASA's QuikScat satellite on August 25, 2005, at 08:37 UTC (4:37 a.m. in Florida). At this time, the storm had 80 kilometers per hour (50 miles per hour, 43 knots) sustained winds. The storm does not appear to yet have reached hurricane strength. The greater danger may be not with her winds, but with Katrina's rains. The storm is moving slowly, just 13 km/hr (8 mph), and is expected to slow as it moves over land. This means that Katrina 's heavy rains will linger longer over one area, dumping 15-25 centimeters (6-10 inches) of rain over Florida and the Bahamas and possibly up to 38 cm (15 inches) in some regions, the National Hurricane Center warns. The image depicts wind speed in color and wind direction with small barbs. White barbs point to areas of heavy rain. The highest wind speeds, shown in purple, surround the center of the storm. Measurements of the wind strength of Tropical Storm Katrina show sustained winds similar to those shown by these QuikScat observations, though not identical. This is because the power of the storm makes accurate measurements difficult. The scatterometer sends pulses of microwave energy through the atmosphere to the ocean surface, and measures the energy that bounces back from the wind-roughened surface. The energy of the microwave pulses changes depending on wind speed and direction, giving scientists a way to monitor wind around the world. Tropical cyclones (the generic term for hurricanes and typhoons) and to a lesser extent, weaker storm systems like Katrina, are difficult to measure. To relate the radar energy return to actual wind speed, scientists compare measurements taken from buoys and other ground stations to data the satellite acquired at the same time and place. Because the high wind speeds generated by cyclones are rare, scientists do not have corresponding ground information to know how to translate data from the satellite for wind speeds above 50 knots (about 93 km/hr or 58 mph). Also, the unusually heavy rain found in a cyclone distorts the microwave pulses in a number of ways, making a conversion to accurate wind speed difficult. Instead, the scatterometer provides a nice picture of the relative wind speeds within the storm and shows wind direction. For more information about the storm, please visit the National Hurricane Center [ http://www.nhc.noaa.gov/ ]. "QuikScat Background" NASA's Quick Scatterometer (QuikScat) spacecraft was launched from Vandenberg Air Force Base, California on June 19, 1999. QuikScat carries the SeaWinds scatterometer, a specialized microwave radar that measures near-surface wind speed and direction under all weather and cloud conditions over the Earth's oceans. More information about the QuikScat mission and observations is available at http://winds.jpl.nasa.gov [ http://photojournal.jpl.nasa.gov/catalog/PIA07432 http://winds.jpl.nasa.gov ] |
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| General Description |
International Space Station Imagery |
|
| General Description |
International Space Station Imagery |
|
|
