MODIS

MODIS: Detecting managed bush fires in Australia

MODIS acquired this image of dozens of managed fires

NASA's Aqua satellite with its Moderate Resolution Imaging Spectroradiometer (MODIS) has acquired an image in Kimberly region on 10 April 2013, Australia showing dozens of managed fires. All of the fires were south and west of the Isdell River; some were burning in and near Windjana Gorge National Park, a popular tourist destination. MODIS detected the fires by thermal infrared energy radiating from the land surface. The locations where MODIS detected fire are labeled with red outlines.

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Fri, 12/04/2013 - 11:53

Bush fires in Australia: NASA satellite captures hot spots

large bush fires burning in southwestern Victoria on February 18, 2013

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this image showing large bush fires burning in southwestern Victoria on February 18, 2013. Red outlines indicate hot spots where MODIS detected unusually warm surface temperatures associated with fires. Winds blew a long plume of smoke south toward the Bass Strait.

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Fri, 22/02/2013 - 09:34

Smog: Terra Satellite captures air pollution in China

Currently, China is experiencing one of the worst periods of air quality in recent history. Residents of Beijing and many other cities in China were warned to stay inside. The Chinese government ordered factories to scale back emissions, while hospitals saw spikes of more than 20 to 30 percent in patients complaining of respiratory issues, according to news reports.

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Tue, 15/01/2013 - 14:03

Floods Slowly Recede around Bangkok

By late November 2011, floods were receding around Thailand’s capital city of Bangkok, but only slowly. These images from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite compare conditions around the city on November 28, 2011 (top), and November 1, 2011 (bottom).

These images use a combination of visible and infrared light to better distinguish between water and land. Water is navy blue. Vegetation is bright green. Bare ground and urban areas are earth-toned. Clouds are pale blue-green.

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Tue, 29/11/2011 - 14:52

October 2011

Lake Sakakawea and Lake Mead Water Resources and Disasters

Current regional and global scale hydrological models, such as the Coupled Routing and Excess STorage (CREST) model, do not take into account the release and storage of water by man-made dams. These models make gross assumptions about dam operation, impairing their accuracy and utility. In many less economically developed areas of the world, it is not possible to acquire information on the timing and extent of water release in dammed regions. Therefore, a remotely sensed-based solution to this problem is highly desirable.

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Wed, 09/11/2011 - 09:26

NASA: A Look Back at a Decade of Fires

NASA's latest Earth-observing satellite, the NPOESS Preparatory Project (NPP), is scheduled to launch from Vandenberg Air Force Base on Oct. 28 to extend key environmental data records established by an earlier generation of NASA satellites. To mark the launch, they are looking back at one of the scientific legacies NPP will build upon: the global fire data record. An instrument on NPP called the Visible Infrared Imager Radiometer Suite (VIIRS) will extend this decades-long record into the future.

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Thu, 20/10/2011 - 11:33

Fires in Bolivia

Fires burned throughout Bolivia in early September 2011. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this natural-color image on September 2, 2011.

Red outlines indicate areas where MODIS has detected high surface temperatures associated with actively burning fires. In many places, the smoke from these blazes is thick enough to completely hide the land surface below from the satellite sensor’s view. In general, the smoke plumes blow toward the west and northwest.

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Thu, 08/09/2011 - 13:54

Landsat image maps aid fire recovery efforts

NASA satellite images regularly map active fires around the world. Once a fire is out, satellite data and maps are also used by scientists to measure and protect the scorched land, and have played an important role in streamlining fire recovery efforts. The Remote Sensing Applications Center (RSAC), operated by the U.S. Department of Agriculture Forest Service, and other national agencies that specialize in fire recovery use Landsat 5 and 7 satellite data to observe vegetation, water and soil changes after a fire.

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Thu, 25/08/2011 - 11:15

Dust and Pollution Rise Before the Monsoon

In the days and weeks before the monsoon, heat builds over India. Hot air rises over the baked earth and westerly winds rush in to fill the void, bringing dust-laden air from the deserts of southwest Asia and the Arabian Peninsula. Through April, May, and June, as monsoon conditions build, the air over the Ganges River plain grows thick with dust, smoke, and haze. Air quality over India is at its worst at this time of year. Finally, in mid- to late-June, the winds shift and cleansing monsoon rains fall.

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Wed, 24/08/2011 - 17:10

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