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SpaceRip giant 97-square mile slab of ice recently broke off from Greenland's Petermann Glacier. Is this a sign that the climate is gradually changing? What does it mean in a global context? NASA scientist Tom Wagner sheds light on these questions.
26 Aug 2010
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9:28
A baby elephant seal curious, brave, and too comfortable with and among people it turns out. Petermann island, Antarctica. Below is a longer description in response to viewers' comments. Antarctica is remote wilderness (yes, even the Peninsula that gets the lion's share of small but increasing tourist numbers). There is no baiting, feeding, tracking or approaching the animals to facilitate interaction with tourists. All close interaction happens by chance and is initiated by the animal itself. The number of people landing at each site is closely monitored (no more than 100 allowed at once) and they leave no footprint (no flags, food, or any waste). Petermann island is visited mainly for the scenery and large bird colonies (two penguin kinds, blue-eyed shags etc.). Not seals. Seals in large numbers are more easily observed on the beaches in the sub-antarctic islands. That is why I was thrilled by this spontaneous encounter with the baby seal on a not-so-large piece of rock. I did not film the end of this encounter but was told both seal and its observers were sad to part ways and head each to their more permanent abode: seal back in the water and people back onto the mother ship. Canon HF100 with a wide-angle Raynox 6600 lens attached was used to film the seal.
2 Jan 2013
6599
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2:18
A look back at the best views of our planet from space in the last year, including true color satellite images, Earth science data visualizations, time lapses from the International Space Station, and computer models. http://www.nasa.gov/externalflash/earthmonth2013/index.html NPP "Blue Marble" http://www.nasa.gov/multimedia/imagegallery/image_feature_2159.html Time-lapse from International Space Station http://eol.jsc.nasa.gov/videos/crewearthobservationsvideos/ NPP daytime view followed by night views http://svs.gsfc.nasa.gov/goto?4019 Arctic Peninsula http://earthobservatory.nasa.gov/IOTD/view.php?id=77791 Linear Dunes http://earthobservatory.nasa.gov/IOTD/view.php?id=78151 Grande Terre http://earthobservatory.nasa.gov/IOTD/view.php?id=79389 River Outflow to the Kara Sea http://earthobservatory.nasa.gov/IOTD/view.php?id=78829 Bylot Island Comparison http://earthobservatory.nasa.gov/IOTD/view.php?id=79813 Crop Circles in the Desert http://earthobservatory.nasa.gov/IOTD/view.php?id=77900 Crack in the Pine Island Glacier http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=76408 Tiny Shrimp, Big Changes http://earthobservatory.nasa.gov/IOTD/view.php?id=78178 Petermann Ice Island 2012 http://svs.gsfc.nasa.gov/goto?11114 Aquarius data swath and sea surface salinity on rotating globe http://svs.gsfc.nasa.gov/goto?3830 http://svs.gsfc.nasa.gov/goto?4046 United States Active Fires 2012 http://svs.gsfc.nasa.gov/goto?4011 Gulf Stream Sea Surface Currents and Temperatures http://svs.gsfc.nasa.gov/goto?3913 Daily 2012 ozone hole http://ozonewatch.gsfc.nasa.gov/ Daily Sea Ice during Aug & Sept 2012 with Winds http://svs.gsfc.nasa.gov/goto?3992 Circulation of Ocean Currents around the Western Antarctic Ice Shelves http://svs.gsfc.nasa.gov/goto?3948 Hurricane Sandy's winds http://svs.gsfc.nasa.gov/goto?30019 Aerosols from GEO-5 Nature Run Collection http://svs.gsfc.nasa.gov/goto?30017 Moonset time-lapse from International Space Station http://eol.jsc.nasa.gov/videos/crewearthobservationsvideos/ This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?11243 Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html Or find NASA Goddard Space Flight Center on facebook: http://www.facebook.com/NASA.GSFC Or find us on Twitter: http://twitter.com/NASAGoddard
17 Apr 2013
4291
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1:15
Hidden for all of human history, a 460 mile long canyon has been discovered below Greenland's ice sheet. Using radar data from NASA's Operation IceBridge and other airborne campaigns, scientists led by a team from the University of Bristol found the canyon runs from near the center of the island northward to the fjord of the Petermann Glacier. A large portion of the data was collected by IceBridge from 2009 through 2012. One of the mission's scientific instruments, the Multichannel Coherent Radar Depth Sounder, operated by the Center for the Remote Sensing of Ice Sheets at the University of Kansas, can see through vast layers of ice to measure its thickness and the shape of bedrock below. For more information: http://www.nasa.gov/content/goddard/nasa-data-reveals-mega-canyon-under-greenland-ice For an HD download of this video: http://svs.gsfc.nasa.gov/goto?11354 To download more Operation IceBridge videos: http://svs.gsfc.nasa.gov/Gallery/OIB.html IceBridge, a six-year NASA mission, is the largest airborne survey of Earth's polar ice ever flown. It will yield an unprecedented three-dimensional view of Arctic and Antarctic ice sheets, ice shelves and sea ice. These flights will provide a yearly, multi-instrument look at the behavior of the rapidly changing features of the Greenland and Antarctic ice. Data collected during IceBridge will help scientists bridge the gap in polar observations between NASA's Ice, Cloud and Land Elevation Satellite (ICESat) -- in orbit since 2003 -- and ICESat-2, planned for late 2015. ICESat stopped collecting science data in 2009, making IceBridge critical for ensuring a continuous series of observations. IceBridge will use airborne instruments to map Arctic and Antarctic areas once a year. The first IceBridge flights were conducted in March/May 2009 over Greenland and in October/November 2009 over Antarctica. Other smaller airborne surveys around the world are also part of the IceBridge campaign.
30 Aug 2013
1399
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