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Fires in the Alaskan Interio …
Forest fires produced hazy s …
7/9/09
Description Forest fires produced hazy skies over interior Alaska in the first week of July 2009. This natural-color (photo-like) image from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite shows several lightning-triggered fires (outlined in red) southwest of Fairbanks, Alaska, on July 7. The largest was the combined Bear Lake/Minto Flats South Fire, according to the situation summary report from the Alaska Interagency Coordination Center on July 7, the fire was estimated to be just over 79,000 acres. The Bear Creek Fire is just inside the northern perimeter of Denali National Park. Dark brown patches mark the locations of old fires. Most fires in interior Alaska are triggered by lightning. According to observations from the Alaska Fire Service's automated lightning-detection network, interior Alaska's "lightning season" peaks in late June or early July. Most strikes occur between 4 and 6 p.m. as a result of severe storms, a severe storm may be accompanied by anywhere from 2,000 to 5,000 lightning strikes. NASA image created by Jesse Allen, using data provided courtesy of the MODIS Rapid Response team. Caption by Rebecca Lindsey.
Date 7/9/09
Carbon Monoxide from Asian F …
Intense fires burning in the …
7/30/09
Description Intense fires burning in the boreal forests of northern Asia and North America routinely send up plumes of smoke that darken skies many kilometers away. By the end of July 2009, large fires were burning in both Russia and Alaska. This image tracks the smoke from those fires by illustrating the concentration of carbon monoxide in the atmosphere. The image was made with data collected by the Measurements of Pollution in the Troposphere (MOPITT) sensor on NASA's Terra satellite between July 20 and July 26, 2009. Spots of red show where carbon monoxide concentrations were high, while orange areas point to moderate concentrations. Gray regions indicate places where no measurements were made. The highest concentrations of carbon monoxide are centered over large fire complexes in Russia. Fires in Alaska were also pumping carbon monoxide into the atmosphere. Carbon monoxide is a component of smoke that can be tracked long after the smoke has dispersed enough to no longer be visible. Carbon monoxide helps reveal where smoke's other invisible fine particles and polluting gases end up. These invisible particles and gases, including carbon monoxide, are ingredients in the production of ground-level ozone, a harmful pollutant. NASA image created by Jesse Allen, using data provided by the National Center for Atmospheric Research (NCAR) and the University of Toronto MOPITT Teams. Caption by Holli Riebeek.
Date 7/30/09
Fires in Yukon Territory, Ca …
Sixty-eight fires were affec …
8/3/09
Description Sixty-eight fires were affecting an estimated 94,107 hectares (232,543 acres) in Canada's Yukon Territory on July 30, 2009, according to the daily situation report from the Canadian Interagency Forest Fire Centre. Several large blazes were pouring out thick smoke plumes when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite passed overhead and captured this natural-color image. Places where MODIS detected active fire are outlined in red. This image is cropped (at left) along the border with Alaska (visible in large image), where even smokier fires are burning. The smoke from these fires and others in Russia's Far East are veiling the entire Arctic with haze. NASA image by Jeff Schmaltz, MODIS Rapid Response Team. Caption by Rebecca Lindsey.
Date 8/3/09
Wildfires in Alaska's Yukon …
Large fires in eastern Alask …
8/3/09
Description Large fires in eastern Alaska's Yukon Flats National Wildlife Refuge were billowing out thick plumes of yellowish smoke when the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite captured this natural-color image on July 30, 2009. The smoke appears to be relatively close to the ground, in many places, brighter clouds lie over top of the smoke. The large version of the image shows that the smoke covers a wide area of Alaska and western Canada. NASA image by Jeff Schmaltz, MODIS Rapid Response Team. Caption by Rebecca Lindsey.
Date 8/3/09
Lambert Glacier and Amery Ic …
The Lambert Glacier, seen in …
2/20/01
Date 2/20/01
Description The Lambert Glacier, seen in the center of this image, is one of the largest and longest of Antarctica's glaciers. It drains about 900,000 square kilometers (560,000 square miles) of East Antarctica. On the southern half of the image, several smaller ice streams, channeled by numerous exposed mountains including the Mawson Escarpment to the east, merge into the Lambert, which broadens as it eventually flows into the ocean and forms the Amery Ice Shelf. The Lambert has clearly visible surface flowlines, which extend hundreds of kilometers into the interior. In the center section, isolated features on the ice shelf that appear bright in the radar image are likely due to past occurrences of surface meltwater accumulating into small lakes and troughs. This mosaic was derived from RADARSAT imagery obtained during the 1997 Antarctic Mapping Mission and shows an area approximately 900 kilometers by 675 kilometers (560 by 415 miles). The Lambert Glacier is centered at approximately 72 degrees south latitude and 67.5 degrees east longitude. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
Weddell Sea/ScanSAR
Two radar images are shown i …
10/26/95
Date 10/26/95
Description Two radar images are shown in this composite to compare the size of a standard spaceborne radar image (small inset) to the image that is created when the radar instrument is used in the ScanSAR mode (large image). The predominant image shows two large ocean circulation features, called eddies, at the northernmost edge of the sea ice pack in the Weddell Sea, off Antarctica. The eddy processes in this region play an important role in the circulation of the global ocean and the transportation of heat toward the pole. The large image is the first wide-swath, multi- frequency, multi-polarization radar image ever processed. To date, no other spaceborne radar sensors have obtained swaths exceeding 100 kilometers (62 miles) in width. This developmental image was produced at NASA's Jet Propulsion Laboratory by the Alaska SAR Facility's ScanSAR processor system, using radar data obtained on October 5, 1994, during the second flight of the Spaceborne Imaging Radar C/X-Band Synthetic Aperture Radar (SIR- C/X-SAR) onboard the space shuttle Endeavour. The image is oriented approximately east-west, with a center location of around 56.6 degrees south latitude and 6.5 degrees west longitude. Image dimensions are 240 km by 350 km (149 miles by 218 miles). The smaller image inset (upper right edge) was obtained by SIR-C/X-SAR on October 6, 1994, and covers a portion of the same ice features that are shown in the large image. The inset image dimensions are 18 km by 50 km (11 miles by 31 miles). The ocean eddies have a clockwise (or cyclonic) rotation and are roughly 40 km to 60 km (25 miles to 37 miles) in diameter. The dark areas are new ice and the lighter green areas are small sea- ice floes that are swept along by surface currents, both of these areas are shown within the eddies and to the south of the eddies. First year seasonal ice, typically 0.5 meter to 0.8 meter (1.5 feet to 2.5 feet) thick, is shown in the darker green area in the lower right corner. The open ocean to the north is uniformly bright and appears blue, due to high winds making the surface rough. The colors in both images were obtained using the following radar channels: red is C-band vertically transmitted and vertically received, green is L-band horizontally transmitted and vertically received, and blue is L-band vertically transmitted and vertically received. The ScanSAR processor is being designed for implementation in 1996 at NASA's Alaska SAR Facility, located at the University of Alaska, Fairbanks, and will produce digital images from the forthcoming Canadian RADARSAT satellite, since its C-band horizontally transmitted, horizontally received polarization radar routinely obtains data over a considerable range of swath-widths and resolutions, including the important wide-swath (300 km to 500 km/186 miles to 310 miles) mode. #####
Amery Ice Shelf
This view of the Amery Ice S …
2/20/01
Date 2/20/01
Description This view of the Amery Ice Shelf is a mosaic of radar images from the 2000 Antarctic Mapping Mission. The blue line represents the coastline seen during the 1997 Antarctic Mapping Mission. The yellow coastline dates from the mid-1970s. Over the past 25 years, the Amery has been in a period of general advancement, moving seaward about 25 kilometers (15.5 miles). From 1997-2000, the ice shelf edge extended seaward about 5 kilometers (3 miles). Note that the coastal areas adjacent to the Amery Ice Shelf on both sides show little change. The two Antarctic mapping missions provide highly accurate coastal baselines needed for future comparisons. This image is centered at approximately 69 degrees south and 72.5 degrees east, covering an area about 115 by 165 kilometers (70 by 100 miles). The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
Antarctic Peninsula
The Antarctica Peninsula is …
2/20/01
Date 2/20/01
Description The Antarctica Peninsula is the furthest north extension of the Antarctic continent and is exposed to slightly warmer climate conditions than the greater continent. This mosaic from the 2000 Antarctic Mapping Mission shows most of the peninsula. The blue line is the coastline seen in the 1997 Antarctic Mapping Mission. The broad Larsen Ice Shelf lies to the east, extending into the Weddell Sea, and smaller ice shelves including the Wordie and George VI are in the southwest corner. The northern Larsen Shelf has been retreating since the 1960s, with major collapses in the 1990s. Warming in both the air and ocean underlying the ice shelves leads to increased fracturing and eventually calving of the ice shelf fronts into icebergs. The 1995 Larsen calving events were due to anomalously warm summer temperatures in the early 1990s. The warming noted in the Antarctica Peninsula, as measured from several research stations located there, is not sufficient to affect the thicker and more extensive West Antarctic ice shelves to the south on the main continent. The two RADARSAT mosaics from 1997 and 2000 Antarctic imaging campaigns provide highly accurate snapshots of this rapidly changing region of the greater Antarctic continent. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles. The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR Facility # # # # #
Larsen Ice Shelf
This sub-image of the Antarc …
2/20/01
Date 2/20/01
Description This sub-image of the Antarctic Peninsula from the 2000 Antarctic Mapping Mission focuses on the northern end of the Larsen Ice Shelf. The blue line shows the coastline in 1997, the red line in 1992, based on synthetic aperture radar imagery from the European Space Agency, and the yellow line in the mid-1970s. The northern Larsen has been retreating since the 1960s, with major collapses in the 1990s. The southern Larsen was advancing until a major collapse in 1995. Small areas, however, also show advancement since 1997, including a section near the Sobral Peninsula in the center of the image. These advancements may indicate early rebuilding of the overall extent of the Larsen Shelf. The two RADARSAT mosaics from 1997 and 2000 Antarctic imaging campaigns provide highly accurate snapshots of this rapidly changing region of the greater Antarctic continent. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR Facility # # # # #
Global View of the Arctic Oc …
The Arctic Ocean has been ma …
8/21/00
Date 8/21/00
Description The Arctic Ocean has been mapped in an unprecedented manner by scientists at NASA's Jet Propulsion Laboratory (JPL), Pasadena, Calif. Using advanced radar that sees through all weather conditions, researchers will now be able to determine how the Earth's warming may be changing the sea ice cover. Sea ice in the polar region is a large barometer of global climate conditions. The mission is a joint project between JPL and the Alaska Synthetic Aperture Radar Facility, University of Alaska, Fairbanks. JPL manages the Sea Ice Thickness Derived from High Resolution Radar Imagery project for NASA's Earth Science Enterprise, Washington, DC. The Earth Science Enterprise is dedicated to studying how natural and human-induced change affects our global environment. This image is posted on the World Wide Web at http://www.jpl.nasa.gov/pictures/seaice .
Comparative Views of Arctic …
Scientists at NASA's Jet Pro …
8/21/00
Date 8/21/00
Description Scientists at NASA's Jet Propulsion Laboratory (JPL) have used high resolution radar to see, for the first time ever, the development of the Arctic sea ice cover. The images show a comparison of ice growth during the Arctic winter. The two images are separated by nine days. Both images represent an area located in the Baufort Sea, north of the Alaskan coast. This radar view covers an area of 96 by 128 kilometers (60 by 80 miles). The brighter features are older thicker ice and the darker areas show young, recently formed ice. The earlier image is shown on the left. Within the nine-day span, large and extensive cracks in the ice cover have formed due to ice movement. These cracks expose the open ocean to the cold, frigid atmosphere where sea ice grows rapidly and thickens. Formation of sea ice in the Arctic Ocean affects the heat balance in the global atmosphere and ocean. The mission is a joint project between JPL and the Alaska Synthetic Aperture Radar Facility, University of Alaska, Fairbanks. JPL manages the Sea Ice Thickness Derived from High Resolution Radar Imagery project for NASA's Earth Science Enterprise, Washington, DC. The Earth Science Enterprise is dedicated to studying how natural and human-induced change affects our global environment. This image is available at http://www.jpl.nasa.gov/pictures/seaice . #####
L-Band West Texas
This radar image of the Midl …
6/22/95
Date 6/22/95
Description This radar image of the Midland/Odessa region of West Texas, demonstrates an experimental technique, called ScanSAR, that allows scientists to rapidly image large areas of the Earth's surface. The large image covers an area 245 kilometers by 225 kilometers (152 miles by 139 miles). It was obtained by the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR- C/X-SAR) flying aboard the space shuttle Endeavour on October 5, 1994. The smaller inset image is a standard SIR-C image showing a portion of the same area, 100 kilometers by 57 kilometers (62 miles by 35 miles) and was taken during the first flight of SIR-C on April 14, 1994. The bright spots on the right side of the image are the cities of Odessa (left) and Midland (right), Texas. The Pecos River runs from the top center to the bottom center of the image. Along the left side of the image are, from top to bottom, parts of the Guadalupe, Davis and Santiago Mountains. North is toward the upper right. Unlike conventional radar imaging, in which a radar continuously illuminates a single ground swath as the space shuttle passes over the terrain, a Scansar radar illuminates several adjacent ground swaths almost simultaneously, by "scanning" the radar beam across a large area in a rapid sequence. The adjacent swaths, typically about 50 km (31 miles) wide, are then merged during ground processing to produce a single large scene. Illumination for this L-band scene is from the top of the image. The beams were scanned from the top of the scene to the bottom, as the shuttle flew from left to right. This scene was acquired in about 30 seconds. A normal SIR- C image is acquired in about 13 seconds. The ScanSAR mode will likely be used on future radar sensors to construct regional and possibly global radar images and topographic maps. The ScanSAR processor is being designed for 1996 implementation at NASA's Alaska SAR Facility, located at the University of Alaska Fairbanks, and will produce digital images from the forthcoming Canadian RADARSAT satellite. Spaceborne Imaging Radar-C and X-band Synthetic Aperture Radar (SIR-C/X-SAR) is part of NASA's Mission to Planet Earth. The radars illuminate Earth with microwaves, allowing detailed observations at any time, regardless of weather or sunlight conditions. SIR-C/X-SAR uses three microwave wavelengths: L-band (24 cm), C-band (6 cm) and X- band (3 cm). The multi-frequency data will be used by the international scientific community to better understand the global environment and how it is changing. The SIR-C/X-SAR data, complemented by aircraft and ground studies, will give scientists clearer insights into those environmental changes which are caused by nature and those changes which are induced by human activity. SIR-C was developed by NASA's Jet Propulsion Laboratory. X-SAR was developed by the Dornier and Alenia Spazio companies for the German space agency, Deutsche Agentur fuer Raumfahrtangelegenheiten (DARA), and the Italian space agency, Agenzia Spaziale Italiana (ASI), with the Deutsche Forschungsanstalt fuer Luft und Raumfahrt e.v.(DLR), the major partner in science, operations, and data processing of X-SAR. #####
Shirase Glacier
This detailed image of the S …
2/20/01
Date 2/20/01
Description This detailed image of the Shirase Glacier from the 2000 Antarctic Mapping Mission shows how the glacier has been retreating. The 1997 coastline appears in blue, the 1962 coastline in green and the mid-1970s coastline in yellow. The Shirase was at its furthest extent in 1962, then it retreated about 60 kilometers (38 miles) in the mid-1970s to a position that nearly matches the 2000 position. In fact, previous in-situ measurements indicate that the Shirase was at one time one of the fastest advancing glaciers in Antarctica. In comparison, adjacent areas to the northwest show current positions similar to both 1962 and 1997 coastlines, with significant retreat periods in the mid-1970s. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
Shirase Glacier Region
The Shirase Glacier retreate …
2/20/01
Date 2/20/01
Description The Shirase Glacier retreated significantly between the 1997 and 2000 Antarctic Mapping Missions. Located in the Indian Ocean sector of Antarctica called Enderby Land, the Shirase drains a basin of about 165,000 square kilometers (about 64 square miles), which extends some 500 kilometers (310 miles) inland from the coast. The glacier appears in the lower central portion of this image at the head of the embayment. As the blue coastline from the 1997 Antarctic Mapping Mission indicates, the floating tongue of the Shirase extended about 12 kilometers (7.5 miles) further northward from the current 2000 position. However, earlier coastline maps show that the extent of the Shirase is extremely variable. This image covers an area of about 375 kilometers (240 miles) by 240 kilometers (150 miles). Most of the image area offshore of the blue 1997 coastline is a mixture of bright-appearing icebergs and darker-appearing sea ice. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles. The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
Lambert Glacier Velocity Map
This image shows the movemen …
2/20/01
Date 2/20/01
Description This image shows the movement of the Lambert Glacier. The ice velocity vectors were obtained by using RADARSAT SAR imagery from the 2000 Antarctic Mapping Mission. Yellow represents the areas of no motion, which are either exposed land or stationary ice. The smaller confluent glaciers have generally low velocities, shown in green, of 100-300 meters (330-980 feet) per year, which gradually increase as they flow down the rapidly changing continental slope into the upper reaches of the faster flowing Lambert Glacier. Most of the Lambert Glacier itself has velocities between 400-800 meters (1,310-2,620 feet) per year, with a slight slowing in the middle section. As the glacier extends across Amery Ice Shelf, velocities increase to 1000-1200 meters (3,280-3,937 feet) per year as the ice sheet spreads out and thins. Only a handful of in-situ velocity measurements have been previously reported of this huge glacier system. While the in-situ and radar-derived measurements appear to be qualitatively similar, the extent and accuracy of the new measurements are unprecedented and provide quantitative baselines for future comparisons. The ice velocities are obtained from pairs of images obtained 24 days apart, using a technique called radar interferometry. This technique enables a highly precise alignment of image pairs that provides accurate measurements of topography as well as surfaces that have changed or moved over the short time interval, including glaciers. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
Wordie Ice Shelf
The Wordie Ice Shelf, shown …
2/20/01
Date 2/20/01
Description The Wordie Ice Shelf, shown in this sub-image of the Antarctic Peninsula from the 2000 Antarctic Mapping Mission, has been disintegrating since the 1960s with significant retreat during the 1990s through 2000. The yellow line represents the coastline in the mid-1970s and the blue line shows where the coast was in 1997. The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
NASA Connect - SF - NASA Air …
NASA Connect Segment that ex …
9/1/01
Description NASA Connect Segment that explores the air traffic control system. It also looks at NASA's program to study safer aviation techniques in the air and on the ground.
Date 9/1/01
NASA TV's This Week @NASA, J …
A NASA-sponsored mission in …
06/25/10
Description A NASA-sponsored mission in Alaska is exploring how changes in the Arctic's sea ice cover may be contributing to global warming.* Now, after years of continuous service to more than a dozen missions, NASA's Tracking and Data Relay Satellite, TDRS 1 is retiring.* The replica Orion crew module used in the highly-successful Launch Abort system Pad Abort-1 flight test in New Mexico May 6 has returned to the Dryden Flight Research Center. * The Glenn Research Center's Plum Brook Station and the Marshall Space Flight Center welcomed members of the STS-131 crew to share highlights from their recent 15-day mission to the International Space Station. * While soccer fans around the world watch and await the winner of the 2010 World Cup, student players from the U.S. and Canada heard scientists and engineers from the Ames Research Center's Fluid Dynamics Laboratory explain the aerodynamics of the “Jabulani'' soccer ball.*
Date 06/25/10
Titan: Larger and Larger Lak …
Description Titan: Larger and Larger Lakes
Full Description This radar image, obtained by Cassini's radar instrument during a near-polar flyby on Feb. 22, 2007, shows a big island smack in the middle of one of the larger lakes imaged on Saturn's moon Titan. This image offers further evidence that the largest lakes are at the highest latitudes. The island is about 90 kilometers (62 miles) by 150 kilometers (93 miles) across, about the size of Kodiak Island in Alaska or the Big Island of Hawaii. The island may actually be a peninsula connected by a bridge to a larger stretch of land. As you go farther down the image, several very small lakes begin to appear, which may be controlled by local topography. This image was taken in synthetic aperture mode at 700 meter (2,300 feet) resolution. North is toward the left. The image is centered at about 79 north degrees north and 310 degrees west. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter was designed, developed and assembled at JPL. The radar instrument was built by JPL and the Italian Space Agency, working with team members from the United States and several European countries. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov/home/index.cfm. Credit: NASA/JPL
Date February 27, 2007
Alaskan Glacier Quakes
title Alaskan Glacier Quakes
date 08.02.2003
description NASA and United States Geological Survey (USGS) scientists found that retreating glaciers in southern Alaska may be opening the way for future earthquakes. The study examined the likelihood of increased earthquake activity in southern Alaska as a result of rapidly melting glaciers. As glaciers melt they lighten the load on the Earth's crust. Tectonic plates, that are mobile pieces of the Earth's crust, can then move more freely, which increases the probability of earthquakes occurring in this region.
Chicxulub Crater
title Chicxulub Crater
date 01.24.1992
description This is a computer-generated gravity map image of the Chicxulub Crater found on Mexico's Yucatan Peninsula. The buried impact structure has been implicated in the mass extinction of life 65 million years ago and may be much larger than scientists first suspected. New analyses of gravity measurements in the region have turned up evidence that the feature is a multiring basin with a fourth, outer ring about 300 kilometers in diameter. At this diameter, the Chixulub Basin represents one of the largest collisions in the inner solar system since the so-called "heavy bombardment" ended almost four billion years ago. (The period of heavy bombardment was caused by the impact of debris from the early formation of the solar system raining in on the newly formed planets.) The only comparable post-bombardment basin is the 280-kilometer-diameter Mead Basin on Venus. *Image Credit*: Virgil L. Sharpton, University of Alaska, Fairbanks
Icy Comet NEAT
title Icy Comet NEAT
date 05.07.2004
description This image of Comet C/2001 Q4 (NEAT) was taken at the WIYN 0.9-meter telescope at Kitt Peak National Observatory near Tucson, AZ, on May 7, 2004. The image was taken with the Mosaic I camera, which has a one-square degree field of view, or about five times the size of the Moon. Even with this large field, only the comet's coma and the inner portion of its tail are visible. This color image was assembled by combining images taken through blue, green and red filters. A small star cluster (C0736-105, or Melotte 72) is visible in the lower right of the image, between the head of the comet and the bright red star in the lower-right corner. Comet C/2001 Q4 (NEAT) was discovered on August 24, 2001, by the Near Earth Asteroid Tracking (NEAT) system operated by NASA's Jet Propulsion Laboratory, Pasadena, CA. *Image Credit*: T. Rector (University of Alaska Anchorage), Z. Levay and L.Frattare (Space Telescope Science Institute) and National Optical Astronomy Observatory/Association of Universities for Research in Astronomy/National Science Foundation
Kitt Peak Optical Image of N …
Name Kitt Peak Optical Image of NGC 281
NGC 281: A Bustling Hub of S …
Name NGC 281: A Bustling Hub of Star Formation
Category Normal Stars & Star Clusters
Release Date November 15, 2007
Mitsubishi A6M2
Title Mitsubishi A6M2
Full Description Captured at Akutan Island, Alaska, in August 1942. This Mitsubishi A6M2 fighter was the first "Zero" to fall intact into Allied hands during WW II. After limited flying on the West Coast, the "Zero" arrived at Langley for installation of test equipment prior to in-depth flight testing by the Navy at Patuxent River, Maryland.
Date 03/08/1943
NASA Center Langley Research Center
Satcom, Communication Satell …
Title Satcom, Communication Satellite
Full Description RCA engineer, Joel Bacher, adjusts a propulsion thruster on a communication satellite. The thrusters were designed to enable the spacecraft to maintain correct altitude control after it had achieved a 22,000-mile synchronous orbit over Earth. The satellite shown is an RCA Satcom domestic communication satellite that was launched December 13, 1975. The satellite was built by RCA Global Communication, Inc. and RCA Alaska Communications, Inc. This domestic communication satellite spurred the cable television industry to unprecedented heights with the assistance of a company known as Home Box Office (HBO). Cable television networks relay signals to ground-based stations using satellites. This allowed cable television to enter into the suburban and metropolitan markets, thus causing HBO to accumulate 1.6 million subscribers by the end of 1977.
Date 12/10/75
NASA Center Headquarters
A Bright Supernova in the Ne …
Title A Bright Supernova in the Nearby Galaxy NGC 2403
A Really Neat Close-up of Co …
Title A Really Neat Close-up of Comet NEAT from Kitt Peak Observatory
General Information What is a News Nugget? News Nuggets are bulletins from the world of astronomy. This image of comet C/2001 Q4 (NEAT) was taken at the WIYN 0.9-meter telescope at Kitt Peak National Observatory near Tucson, Ariz., on May 7, 2004. The image was captured with the Mosaic I camera, which has a one-square degree field of view, or about five times the size of the Moon. Even with this large field, only the comet's coma and the inner portion of its tail are visible. A small star cluster (C0736-105, or Melotte 72) is visible in the lower right of the image, between the head of the comet and the bright red star in the lower-right corner.
Hubble Celebrates 15th Anniv …
Title Hubble Celebrates 15th Anniversary with Spectacular New Images
General Information What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. Back to top [ #top ]
Hubble Celebrates 15th Anniv …
Title Hubble Celebrates 15th Anniversary with Spectacular New Images
General Information What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. Back to top [ #top ]
Hubble Finds Mysterious Disk …
Title Hubble Finds Mysterious Disk of Blue Stars Around Black Hole
Nearby Dust Clouds in the Mi …
Title Nearby Dust Clouds in the Milky Way
General Information What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. NASA's Hubble Space Telescope has photographed dense knots of dust and gas in our Milky Way Galaxy. This cosmic dust is a concentration of elements that are responsible for the formation of stars in our galaxy and throughout the universe. These dark, opaque knots of gas and dust are called "Bok globules," and they are absorbing light in the center of the nearby emission nebula and star-forming region, NGC 281. These images were taken with Hubble's Advanced Camera for Surveys in October 2005. NGC 281 is located nearly 9,500 light-years away in the direction of the constellation Cassiopeia.
This composite image present …
Description This composite image presents the three most visible elements of space weather: a storm from the Sun, aurora as seen from space Joseph B. Gurman Normal Joseph B. Gurman 2 2001-12-26T16:59:00Z 2001-12-26T16:59:00Z 1 NASA GSGC 1 1 9.2511 800x600 150 0 0 This composite image presents the three most visible elements of space weather: a storm from the Sun, aurora as seen from space, and aurora as seen from the Earth.  The solar storm is a corona mass ejection (CME) composite from EIT 304Å superimposed on a LASCO C2 image, both from SOHO.  The middle image from Polar's VIS imager shows charged particles as they spread down across the U.S. during a large solar storm event on July 14, 2000. Lastly, Jan Curtis took this image of an aurora display in Alaska, the visible evidence of space weather that we see here on Earth.
AGU Press Briefing May 29th: …
Title AGU Press Briefing May 29th: Global Land Ice Measurements from Space. (Dobbin Glacier Zoom 2)
Abstract ASTER images are being used in an ambitious international project to map the extent of the world's glaciers and the rate at which they are changing. High-resolution ASTER images make it possible to distinguish and track small features on glacier surfaces. Images presented by Rick Wessels from Arizona State University showing details of snow and ice of glaciers are contributing to the Global Land Ice Measurements from Space (GLIMS) project, a global consortium led by the U.S. Geological Survey.
Completed 2001-05-22
AGU Press Briefing May 29th: …
Title AGU Press Briefing May 29th: Global Land Ice Measurements from Space. (Dobbin Glacier Zoom 2)
Abstract ASTER images are being used in an ambitious international project to map the extent of the world's glaciers and the rate at which they are changing. High-resolution ASTER images make it possible to distinguish and track small features on glacier surfaces. Images presented by Rick Wessels from Arizona State University showing details of snow and ice of glaciers are contributing to the Global Land Ice Measurements from Space (GLIMS) project, a global consortium led by the U.S. Geological Survey.
Completed 2001-05-22
Glacier Bay
Title Glacier Bay
Abstract This animation is a bird's eye view of Glacier Bay, Alaska. It was created as part of a series of animations to feature our National Parks
Completed 1999-08-14
2007 Arctic Sea Ice from AMS …
Title 2007 Arctic Sea Ice from AMSR-E with Alaska in Foreground
Abstract Sea ice is frozen seawater floating on the surface of the ocean. Some sea ice is semi-permanent, persisting from year to year, and some is seasonal, melting and refreezing from season to season. The sea ice cover reaches its minimum extent at the end of each summer and the remaining ice is called the perennial ice cover. The 2007 Arctic summer sea ice has reached the lowest extent of perennial ice cover on record - nearly 25% less than the previous low set in 2005. The area of the perennial ice has been steadily decreasing since the satellite record began in 1979, at a rate of about 10% per decade. But the 2007 minimum, reached on September 14, is far below the previous record made in 2005 and is about 38% lower than the climatological average. Such a dramatic loss has implications for ecology, climate and industry. The AMSR-E instrument on the Aqua satellite acquires high resolution measurements of the 89 GHz brightness temperature near the poles. Because this is a passive microwave sensor which is not so sensitive to atmospheric effects, this sensor is able to observe the entire polar region every day, even through clouds and snowfall. This animation progresses at a rate of six frames per day from January 1, 2007 through the minimum extent which occurred on September 14, 2007. The false color of the sea ice, derived from the AMSR-E 6.25 km 89 GHz brightness temperature, highlights the fissures or divergence areas in the sea ice cover by warm brightness temperatures (in blue) while cold brightness temperatures, shown in brighter white, represent consolidated sea ice. The sea ice edge is defined by the 15% ice concentration contour in the three-day moving average of the AMSR-E 12.5 km sea ice concentration data while ice extent is the sum of all pixels with at least 15% ice. An image of the sea ice on September 14, 2007 is included below, along with a corresponding image from September 21, 2005 showing the previous minimum sea ice extent.
Completed 2007-09-11
2007 Arctic Sea Ice from AMS …
Title 2007 Arctic Sea Ice from AMSR-E with Alaska in Foreground
Abstract Sea ice is frozen seawater floating on the surface of the ocean. Some sea ice is semi-permanent, persisting from year to year, and some is seasonal, melting and refreezing from season to season. The sea ice cover reaches its minimum extent at the end of each summer and the remaining ice is called the perennial ice cover. The 2007 Arctic summer sea ice has reached the lowest extent of perennial ice cover on record - nearly 25% less than the previous low set in 2005. The area of the perennial ice has been steadily decreasing since the satellite record began in 1979, at a rate of about 10% per decade. But the 2007 minimum, reached on September 14, is far below the previous record made in 2005 and is about 38% lower than the climatological average. Such a dramatic loss has implications for ecology, climate and industry. The AMSR-E instrument on the Aqua satellite acquires high resolution measurements of the 89 GHz brightness temperature near the poles. Because this is a passive microwave sensor which is not so sensitive to atmospheric effects, this sensor is able to observe the entire polar region every day, even through clouds and snowfall. This animation progresses at a rate of six frames per day from January 1, 2007 through the minimum extent which occurred on September 14, 2007. The false color of the sea ice, derived from the AMSR-E 6.25 km 89 GHz brightness temperature, highlights the fissures or divergence areas in the sea ice cover by warm brightness temperatures (in blue) while cold brightness temperatures, shown in brighter white, represent consolidated sea ice. The sea ice edge is defined by the 15% ice concentration contour in the three-day moving average of the AMSR-E 12.5 km sea ice concentration data while ice extent is the sum of all pixels with at least 15% ice. An image of the sea ice on September 14, 2007 is included below, along with a corresponding image from September 21, 2005 showing the previous minimum sea ice extent.
Completed 2007-09-11
2007 Arctic Sea Ice from AMS …
Title 2007 Arctic Sea Ice from AMSR-E with Alaska in Foreground
Abstract Sea ice is frozen seawater floating on the surface of the ocean. Some sea ice is semi-permanent, persisting from year to year, and some is seasonal, melting and refreezing from season to season. The sea ice cover reaches its minimum extent at the end of each summer and the remaining ice is called the perennial ice cover. The 2007 Arctic summer sea ice has reached the lowest extent of perennial ice cover on record - nearly 25% less than the previous low set in 2005. The area of the perennial ice has been steadily decreasing since the satellite record began in 1979, at a rate of about 10% per decade. But the 2007 minimum, reached on September 14, is far below the previous record made in 2005 and is about 38% lower than the climatological average. Such a dramatic loss has implications for ecology, climate and industry. The AMSR-E instrument on the Aqua satellite acquires high resolution measurements of the 89 GHz brightness temperature near the poles. Because this is a passive microwave sensor which is not so sensitive to atmospheric effects, this sensor is able to observe the entire polar region every day, even through clouds and snowfall. This animation progresses at a rate of six frames per day from January 1, 2007 through the minimum extent which occurred on September 14, 2007. The false color of the sea ice, derived from the AMSR-E 6.25 km 89 GHz brightness temperature, highlights the fissures or divergence areas in the sea ice cover by warm brightness temperatures (in blue) while cold brightness temperatures, shown in brighter white, represent consolidated sea ice. The sea ice edge is defined by the 15% ice concentration contour in the three-day moving average of the AMSR-E 12.5 km sea ice concentration data while ice extent is the sum of all pixels with at least 15% ice. An image of the sea ice on September 14, 2007 is included below, along with a corresponding image from September 21, 2005 showing the previous minimum sea ice extent.
Completed 2007-09-11
Shishaldin Volcano in Alaska …
Title Shishaldin Volcano in Alaska.
Completed 1999-06-10
Fires Ravage Parts of Alaska …
Title Fires Ravage Parts of Alaska and Canada
Abstract Alaska and Canada both suffered multi-fire damage. On June 29, 2004, these smoke plumes were detected from space by the Aqua satellite.
Completed 2004-08-19
Fires Ravage Parts of Alaska …
Title Fires Ravage Parts of Alaska and Canada
Abstract Alaska and Canada both suffered multi-fire damage. On June 29, 2004, these smoke plumes were detected from space by the Aqua satellite.
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
Alaska Fire Particles Traver …
Title Alaska Fire Particles Traverse Parts of Canada and the United States (June 29, 2004, through July 19, 2004)
Abstract Aerosols created by fires in Alaska and Canada waft over the United States. These images from the TOMS instrument show levels of the absorbing aerosol particles (airborne microscopic dust/smoke). More information on the TOMS instrument can be viewed at (http://toms.gsfc.nasa.gov/index.html).
Completed 2004-08-19
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