Mostrando entradas con la etiqueta NASA’s Operation IceBridge. Mostrar todas las entradas
Mostrando entradas con la etiqueta NASA’s Operation IceBridge. Mostrar todas las entradas

miércoles, 20 de julio de 2016

NASA : Melt Water Over Arctic Sea Ice .- Derritiendo el hielo de agua sobre el mar Ártico

http://www.nasa.gov/image-feature/melt-water-over-arctic-sea-ice

overhead view of sea ice with a large melt pond
Sea ice across the Arctic Ocean is shrinking to below-average levels this summer. NASA’s Operation IceBridge, an airborne survey of polar ice, just completed its first flights studying the aquamarine pools of melt water on the ice surface that may be accelerating the overall sea ice retreat.
This large pool of melt water over sea ice was seen from an Operation IceBridge flight over the Beaufort Sea on July 14, 2016. During this summer campaign, IceBridge will map the extent, frequency and depth of melt ponds like these to help scientists forecast the Arctic sea ice yearly minimum extent in September.
Image Credit: NASA/Operation IceBridge
Last Updated: July 19, 2016
Editor: Sarah Loff
NASA
Guillermo Gonzalo Sánchez Achutegui
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domingo, 19 de octubre de 2014

NASA : Operation IceBridge Turns Five

Hola amigos: A VUELO DE UN QUINDE EL BLOG., la agencia espacial NASA, nos informa sobre sus investigaciones con su proyecto en la Antártica : NASA’s Operation IceBridge, ....En mayo de 2014, dos nuevos estudios concluyeron que una sección de la capa de hielo de la Antártida occidental con base en tierra había llegado a un punto de un colapso inevitable. Mientras tanto, nuevas observaciones desde septiembre 2014 mostraron hielo marino alrededor de la Antártida había alcanzado su máxima extensión desde finales del decenio de 1970........
Para comprender mejor estas diferencias dinámicos y dramáticos en la tierra y el mar de hielo de la región, los investigadores están viajando hacia el sur hasta la Antártida este mes por sexta campaña de la Operación IceBridge de la NASA. La campaña aérea, que también vuela cada año sobre Groenlandia, hace que las encuestas anuales del hielo con aviones de investigación instrumentado....
Instrumentos van de los láseres que se asignan la elevación de la superficie del hielo, los radares que "ver" debajo de él, y hacia abajo en busca de cámaras para proporcionar una perspectiva de color natural. El (DMS) de la cámara Sistema de cartografía digital adquirió la foto de arriba durante el primer vuelo científico de la misión el 16 de octubre de 2009 En el momento de la imagen, el avión DC-8 estaba volando a una altitud de 515 metros (1.700 pies) sobre pesadamente primer año compactada hielo marino a lo largo del borde del Mar de Amundsen........................

Operation IceBridge Turns Five
In May 2014, two new studies concluded that a section of the land-based West Antarctic ice sheet had reached a point of inevitable collapse. Meanwhile, fresh observations from September 2014 showed sea ice around Antarctica had reached its greatest extent since the late 1970s.
To better understand such dynamic and dramatic differences in the region's land and sea ice, researchers are travelling south to Antarctica this month for the sixth campaign of NASA’s Operation IceBridge. The airborne campaign, which also flies each year over Greenland, makes annual surveys of the ice with instrumented research aircraft.
Instruments range from lasers that map the elevation of the ice surface, radars that "see" below it, and downward looking cameras to provide a natural-color perspective. The Digital Mapping System (DMS) camera acquired the above photo during the mission’s first science flight on October 16, 2009. At the time of the image, the DC-8 aircraft was flying at an altitude of 515 meters (1,700 feet) over heavily compacted first-year sea ice along the edge of the Amundsen Sea.
Since that first flight, much has been gleaned from IceBridge data. For example, images from an IceBridge flight in October 2011 revealed a massive crack running about 29 kilometers (18 miles) across the floating tongue of Antarctica's Pine Island Glacier. The crack ultimately led to a 725-square-kilometer (280-square-mile) iceberg.
In 2012, IceBridge data was a key part of a new map of Antarctica called Bedmap2. By combining surface elevation, ice thickness, and bedrock topography, Bedmap2 gives a clearer picture of Antarctica from the ice surface down to the land surface. Discoveries have been made in Greenland, too, including the identification of a 740-kilometer-long (460-mile-long) mega canyon below the ice sheet.
Repeated measurements of land and sea ice from aircraft extend the record of observations once made by NASA’s Ice, Cloud, and Land Elevation Satellite, or ICESat, which stopped functioning in 2009. In addition to extending the ICESat record, IceBridge also sets the stage for ICESat-2, which is scheduled for launch in 2017.
Image Credit: IceBridge DMS L0 Raw Imagery courtesy of the Digital Mapping System (DMS) team/NASA DAAC at the National Snow and Ice Data Center
Caption: Kathryn Hansen
NASA
Guillermo Gonzalo Sánchez Achutegui
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martes, 8 de abril de 2014

NASA : Fjord in East Greenland Seen by NASA's Operation IceBridge


Fjord in East Greenland Seen by NASA's Operation IceBridge
This view of the frozen fjord downstream of Violingletscher (Violin Glacier) in Østgrønland (East Greenland) was seen during an Operation IceBridge survey flight on April 5, 2014.
NASA’s Operation IceBridge images Earth's polar ice in unprecedented detail to better understand processes that connect the polar regions with the global climate system. IceBridge utilizes a highly specialized fleet of research aircraft and the most sophisticated suite of innovative science instruments ever assembled to characterize annual changes in thickness of sea ice, glaciers, and ice sheets. In addition, IceBridge collects critical data used to predict the response of earth’s polar ice to climate change and resulting sea-level rise. IceBridge also helps bridge the gap in polar observations between NASA's ICESat satellite missions.
Image Credit: NASA/Michael Studinger
NASA
Guillermo Gonzalo Sánchez Achutegui
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ayabaca@hotmail.com
ayabaca@yahoo.com
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