During a flight over the Pine Island Glacier ice shelf, the DC-8 banks over the Amundsen Sea and the clean edge of the ice shelf front. The shelf drops about 200 feet from its surface to sea level. This image was taken on Oct. 26, 2011. Credit: NASA/GSFC/Jefferson Beck NASA's Operation IceBridge returns to a base camp of Punta Arenas, Chile for the third year of flights over Antarctica's changing sea ice, glaciers and ice sheets. NASA's DC-8, outfitted with seven remote-sensing instruments, and a Gulfstream 5 operated by the National Science Foundation and National Center for Atmospheric Research and outfitted with a high-altitude laser-ranging mapper, will fly from Chile over Antarctica in October and November. The mission is designed to record changes to Antarctica's ice sheets and give scientists insight into what is driving those changes. Follow the progress of the mission: Campaign News site: <a href="http://www.nasa.gov/mission_pages/icebridge/index.html" rel="nofollow">www.nasa.gov/mission_pages/icebridge/index.html</a> IceBridge blog: <a href="http://blogs.nasa.gov/cm/newui/blog/viewpostlist.jsp?blogname=icebridge" rel="nofollow">blogs.nasa.gov/cm/newui/blog/viewpostlist.jsp?blogname=ic...</a> Twitter: @nasa_ice <a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a> <a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a> Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a> Find us on <a href="http://instagrid.me/nasagoddard/?vm=grid" rel="nofollow">Instagram</a>

Newly Found Crack Across the Pine Island Glacier

A close-up image of the crack spreading across the ice shelf of Pine Island Glacier shows the details of the boulder-like blocks of ice that fell into the rift when it split. For most of the 18-mile stretch of the crack that NASA’s DC-8 flew over on Oct. 26, 2011, it stretched about 240 feet wide, as roughly seen here. The deepest points ranged from about 165 to 190 feet, roughly equal to the top of the ice shelf down to sea level. Scientists expect the crack to propagate and the ice shelf to calve an iceberg of more than 300 square miles in the coming months. This image was captured by the Digital Mapping System (DMS) aboard the DC-8. Credit: NASA/DMS NASA's Operation IceBridge returns to a base camp of Punta Arenas, Chile for the third year of flights over Antarctica's changing sea ice, glaciers and ice sheets. NASA's DC-8, outfitted with seven remote-sensing instruments, and a Gulfstream 5 operated by the National Science Foundation and National Center for Atmospheric Research and outfitted with a high-altitude laser-ranging mapper, will fly from Chile over Antarctica in October and November. The mission is designed to record changes to Antarctica's ice sheets and give scientists insight into what is driving those changes. Follow the progress of the mission: Campaign News site: <a href="http://www.nasa.gov/mission_pages/icebridge/index.html" rel="nofollow">www.nasa.gov/mission_pages/icebridge/index.html</a> IceBridge blog: <a href="http://blogs.nasa.gov/cm/newui/blog/viewpostlist.jsp?blogname=icebridge" rel="nofollow">blogs.nasa.gov/cm/newui/blog/viewpostlist.jsp?blogname=ic...</a> Twitter: @nasa_ice <a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a> <a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a> Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a> Find us on <a href="http://instagrid.me/nasagoddard/?vm=grid" rel="nofollow">Instagram</a>