|
|
New Data from Aura's Microwa
…
| Title |
New Data from Aura's Microwave Limb Sounder (MLS) Temperature |
| Abstract |
The Microwave Limb Sounder (MLS) measures the chemistry of the lower stratosphere and upper troposphere. It also measures the temperature. |
| Completed |
2004-12-14 |
|
New Data from Aura's Microwa
…
| Title |
New Data from Aura's Microwave Limb Sounder (MLS) Nitric Acid |
| Abstract |
The Microwave Limb Sounder (MLS) measures the chemistry of the lower stratosphere and upper troposphere. Nitric Acid is a corrosive, non-volatile, and inorganic acid. In the atmosphere it is formed by the conversion of nitrogen monoxide into nitrogen dioxide, and ultimately into nitric acid. |
| Completed |
2004-12-14 |
|
AURA/OMI Tropospheric Ozone
…
| Title |
AURA/OMI Tropospheric Ozone On a Flat Map |
| Abstract |
Aura's instruments study tropospheric, or low-level atmospheric chemistry and will monitor of air pollution around the world on a daily basis. Aura measures five of the six 'Criteria Pollutants' identified by the U.S. Environmental Protection Agency. The complexity of pollution transport makes it difficult to quantify how much industry contributes to poor local air quality. |
| Completed |
2004-12-07 |
|
New Data from Aura's Microwa
…
| Title |
New Data from Aura's Microwave Limb Sounder (MLS) Ozone |
| Abstract |
The Microwave Limb Sounder (MLS) measures the chemistry of the lower stratosphere and upper troposphere. Ozone that is present in the troposphere is mostly a result of anthropogenic pollution and therefore higher concentrations are found in urban areas. |
| Completed |
2004-12-14 |
|
New Data from Aura's Microwa
…
| Title |
New Data from Aura's Microwave Limb Sounder (MLS) Hydrochloric Acid |
| Abstract |
The Microwave Limb Sounder (MLS) measures the chemistry of the lower stratosphere and upper troposphere. Hydrogen Chloride, is a covalent bonded nonflammable gas and ionizes almost completely when dissolved in water. When dissolved in water, hydrogen chloride forms a strong acid, hydrochloric acid. |
| Completed |
2004-12-14 |
|
New Data from Aura's Microwa
…
| Title |
New Data from Aura's Microwave Limb Sounder (MLS) Water Vapor |
| Abstract |
The Microwave Limb Sounder (MLS) measures the chemistry of the lower stratosphere and upper troposphere. Measuring concentration of water vapor and other chemicals. Approximately 50 percent of the atmosphere's moisture lies within about 1.84 km of the earth's surface, and only a minute fraction of the total occurs above the tropopause. |
| Completed |
2004-12-14 |
|
New Data from Aura's Microwa
…
| Title |
New Data from Aura's Microwave Limb Sounder (MLS) Chlorine Monoxide |
| Abstract |
The Microwave Limb Sounder (MLS) measures the chemistry of the lower stratosphere and upper troposphere. Measuring concentration of chlorine monoxide and other chemicals. Chlorine monoxide (CIO) is formed by the photolysis of CFCs in the stratosphere and the subsequent destruction of an ozone molecule, these radicals can act as a catalyst in the destruction of ozone while not being destroyed themselves. |
| Completed |
2004-12-14 |
|
Mount St. Helens
| Title |
Mount St. Helens |
| Description |
After over a decade of silence, Mount St. Helens has started to rumble. Following a week of threatening earthquakes, the volcano belched forth a plume of ash and steam on October 1, 2004. Hot rock pushed to the surface, vaporizing the mountain glaciers into steam. The earthquakes continued over the course of the following three days accompanied by another small steam eruption. On October 4, a second cloud of steam billowed from the mountain for about 40 minutes starting at 9:43 a.m., local time. Two hour later, the Ikonos satellite captured this detailed image of the volcano?s crater. A small cloud of steam and ash can be still be seen rising from the left edge of the circular crater in the center of the image. The surface of the volcano bears scars from past activity with silvery ribbons of lava radiating from the center. For updates and additional information about the eruption, please visit the Cascade Volcano Observatory [ http://vulcan.wr.usgs.gov/News/framework.html ] sponsored by the USGS. Image copyright Space Imaging [ http://www.spaceimaging.com/ ] |
|
Mount St. Helens
| Title |
Mount St. Helens |
| Description |
After over a decade of silence, Mount St. Helens has started to rumble. Following a week of threatening earthquakes, the volcano belched forth a plume of ash and steam on October 1, 2004. Hot rock pushed to the surface, vaporizing the mountain glaciers into steam. The earthquakes continued over the course of the following three days accompanied by another small steam eruption. On October 4, a second cloud of steam billowed from the mountain for about 40 minutes starting at 9:43 a.m., local time. Two hour later, the Ikonos satellite captured this detailed image of the volcano?s crater. A small cloud of steam and ash can be still be seen rising from the left edge of the circular crater in the center of the image. The surface of the volcano bears scars from past activity with silvery ribbons of lava radiating from the center. For updates and additional information about the eruption, please visit the Cascade Volcano Observatory [ http://vulcan.wr.usgs.gov/News/framework.html ] sponsored by the USGS. Image copyright Space Imaging [ http://www.spaceimaging.com/ ] |
|
Mount St. Helens
| Title |
Mount St. Helens |
| Description |
After more than a decade of inactivity, Mt. St. Helens in Washington began rumbling in late September with a series of small earthquakes, some of which were of the long-period type that geologists have come to recognize as the telltale sign that magma from the Earth?s interior is rising up to the surface. On October 1, 2004, the volcano released a small explosion of steam and ash and briefly quieted down, but in the days since, the earthquake activity resumed. Scientists raised the volcano?s alert level to three, the final step below active eruption. On October 4, the day this image was captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA?s Terra satellite, Mt. St. Helens again emitted steam and ash: during a 30-minute episode in the morning and for a 10-minute episode in the early afternoon. According to reports form the U.S. Geological Survey, the steam was likely produced by hot rock pushed up onto the mountain?s glacier that melted the ice and generated steam. Mt. St. Helens is located to the left of the center of this image, and the ash and steam plume are visible drifting away from the volcano to the southeast, toward the glacier-covered peak of Mt. Adams. Other large mountains in the scene are Mt. Rainer (top) and Mt. Hood (bottom). The Columbia River cuts east-west through the lower part of the image, and the city of Portland appears as a gray patch along its banks at lower left. Other signs that an eruption is likely in the near future are a bubbling (boiling) lake that has formed in the vent where the ash and steam were released on October 4, a quick return to earthquake activity following the emission episodes, the continued rising of part of the glacier and the south flank of the lava dome, opening cracks in the lava dome, and the detection of carbon dioxide and hydrogen sulfide gases at numerous sites. For more information on the current status of the volcano, please visit the U.S.G.S. Cascades Volcano Observatory [ http://vulcan.wr.usgs.gov/News/ ]Website. NASA image courtesy Jeff Schmaltz, MODIS Rapid Response Team, NASA-GSFC |
|
Mount St. Helens
| Title |
Mount St. Helens |
| Description |
In the week and a half since Mount St. Helens rumbled back to life, it has quieted somewhat. The steady earthquakes have slowed as have the intermittent plumes of ash and steam. Though the alert level has been dropped to Alert Level 2, scientists are still wary of the volcano, warning that it could still erupt with little or no warning. Changes in activity levels, possibly for the next few months, are to be expected says the United States Geological Survey (USGS) Cascades Volcano Observatory [ http://vulcan.wr.usgs.gov/News/framework.html ]. Mount St. Helens? most recent eruption began on October 1, 2004, when it released a large cloud of ash and steam. Small plumes rose from the volcano in the succeeding few days, and it was in this period, on October 4, when the ALI sensor on NASA?s EO-1 satellite took this image. Here, the volcano?s crater is the dark shadow in the tan circular region on the left side of the image. White clouds of steam stream away from the crater across the image. The lake to the south of the crater is Swift Reservoir on the Lewis River. In the days since this image was taken, only light clouds of steam have risen from the crater where hot volcanic rock has turned the volcano?s glacier to steam. NASA image courtesy Lawrence Ong, EO-1 Mission Science Office [ http://eo1.gsfc.nasa.gov/ ], NASA GSFC |
|
Ongoing Eruption of Mount Be
…
| Title |
Ongoing Eruption of Mount Belinda |
| Description |
IKONOS captured this spectacular view of the ongoing eruption of the Mount Belinda volcano on Montagu Island, in the South Sandwich Islands of the Scotia Sea, some 250 kilometers from South Georgia Island. The South Sandwich Islands are situated approximately between the southern tip of South America and mainland Antarctica. Montagu Island is dominated by the long-dormant Mount Belinda stratovolcano, which rises 1370 meters above sea level. This volcano is totally ice-covered, and until late 2001, it was inactive, thereby accumulating a thick cover of ice and snow. However, as this image shows, the volcano began erupting in late 2001, spewing basaltic lavas that have melted the ice, producing a marvelous ?natural laboratory? for studying lava-ice interactions relevant to the biology of extreme environments as well as to processes believed to be important on the planet Mars. This image was acquired on October 1, 2004, and shows the steaming vent crater and dark, basaltic tephra covered ice surfaces to the north of the lavas which erupted down the northern flank of the Mt. Belinda stratovolcano. The steam plume is drifting toward the north, and light clouds surround the south side of the crater. White chunks of ice float in the ocean surrounding Montagu Island. The full resolution version of the image shown above has a resolution of 4 meters per pixel, but IKONOS also acquired the image at 1 meter per pixel (3.20 Mb). Thanks to the 1-meter imaging capabilities of the IKONOS satellite, dynamic processes such as those on remote, uninhabited islands, can be monitored from orbit, thereby serving to target more intensive field studies when they are justified. As such, IKONOS imaging of localities such as active eruptions involving ice-lava interactions, represents a new form of scientific exploration of planet Earth. Image copyright Space Imaging [ http://www.spaceimaging.com/ ], caption by Dr. Jim Garvin, NASA Chief Scientist for Mars and the Moon |
|
Toxic Algal Bloom off Washin
…
| Title |
Toxic Algal Bloom off Washington |
| Description |
Thriving ocean plants form clouds of green in the waters of the Pacific along the coast of Washington and Vancouver Island. On September 29, 2004, researchers from the University of Washington and NOAA reported finding a large bloom of Pseudo-nitzschia, a toxic algae, off the Strait of Juan de Fuca, the channel of water that separates Vancouver Island in the north from Washington State in the south. Fed by cold ocean waters that rise from the ocean floor near the coast, phytoplankton blooms are frequent in this region, and some are toxic. At about 48 kilometers (30 miles) across, this bloom is the largest toxic algae bloom ever observed near the Juan de Fuca Strait. On October 1, 2004, the Sea-viewing Wide Field-of-view Sensor aboard the OrbView-2 satellite detected high concentrations of chlorophyll in the Pacific Ocean. Not all of the chlorophyll seen in the right image is from the toxic bloom. It is likely that other forms of phytoplankton also color the water, and from this image alone, it is impossible to tell which are toxic algae and which are other plants. On September 29, the toxic bloom was reported to be about 24 kilometers (15 miles) off the northwest coast of Washington. NASA images courtesy the SeaWiFS Project [ http://seawifs.gsfc.nasa.gov/SEAWIFS.html ], NASA/Goddard Space Flight Center, and ORBIMAGE [ http://www.orbimage.com/ ]. |
|
Toxic Algal Bloom off Washin
…
| Title |
Toxic Algal Bloom off Washington |
| Description |
Thriving ocean plants form clouds of green in the waters of the Pacific along the coast of Washington and Vancouver Island. On September 29, 2004, researchers from the University of Washington and NOAA reported finding a large bloom of Pseudo-nitzschia, a toxic algae, off the Strait of Juan de Fuca, the channel of water that separates Vancouver Island in the north from Washington State in the south. Fed by cold ocean waters that rise from the ocean floor near the coast, phytoplankton blooms are frequent in this region, and some are toxic. At about 48 kilometers (30 miles) across, this bloom is the largest toxic algae bloom ever observed near the Juan de Fuca Strait. On October 1, 2004, the Sea-viewing Wide Field-of-view Sensor aboard the OrbView-2 satellite detected high concentrations of chlorophyll in the Pacific Ocean. Not all of the chlorophyll seen in the right image is from the toxic bloom. It is likely that other forms of phytoplankton also color the water, and from this image alone, it is impossible to tell which are toxic algae and which are other plants. On September 29, the toxic bloom was reported to be about 24 kilometers (15 miles) off the northwest coast of Washington. NASA images courtesy the SeaWiFS Project [ http://seawifs.gsfc.nasa.gov/SEAWIFS.html ], NASA/Goddard Space Flight Center, and ORBIMAGE [ http://www.orbimage.com/ ]. |
|
Toxic Algal Bloom off Washin
…
| Title |
Toxic Algal Bloom off Washington |
| Description |
Thriving ocean plants form clouds of green in the waters of the Pacific along the coast of Washington and Vancouver Island. On September 29, 2004, researchers from the University of Washington and NOAA reported finding a large bloom of Pseudo-nitzschia, a toxic algae, off the Strait of Juan de Fuca, the channel of water that separates Vancouver Island in the north from Washington State in the south. Fed by cold ocean waters that rise from the ocean floor near the coast, phytoplankton blooms are frequent in this region, and some are toxic. At about 48 kilometers (30 miles) across, this bloom is the largest toxic algae bloom ever observed near the Juan de Fuca Strait. On October 1, 2004, the Sea-viewing Wide Field-of-view Sensor aboard the OrbView-2 satellite detected high concentrations of chlorophyll in the Pacific Ocean. Not all of the chlorophyll seen in the right image is from the toxic bloom. It is likely that other forms of phytoplankton also color the water, and from this image alone, it is impossible to tell which are toxic algae and which are other plants. On September 29, the toxic bloom was reported to be about 24 kilometers (15 miles) off the northwest coast of Washington. NASA images courtesy the SeaWiFS Project [ http://seawifs.gsfc.nasa.gov/SEAWIFS.html ], NASA/Goddard Space Flight Center, and ORBIMAGE [ http://www.orbimage.com/ ]. |
|
|
