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Topic: Maria-José ViñasWritten by Maria-Jose Vinas
This year’s maximum extent peaked at 5.71 million square miles (14.78 million square kilometers) and is 332,000 square miles (860,000 square kilometers) below the 1981 to 2010 average maximum – equivalent to missing an area of ice larger than the state of Texas. ![]() A big lead, or opening in the sea ice pack, in the eastern Beaufort Sea, as seen from a NASA Operation IceBridge survey flight on Apr. 14, 2018. (NASA/Linette Boisvert) «Read the rest of this article» Sections: Technology | No Comments
NASA reports Wintertime Arctic Sea Ice Growth Slows, Long-term DeclineWritten by Maria-José Viñas
As temperatures in the Arctic have warmed at double the pace of the rest of the planet, the expanse of frozen seawater that blankets the Arctic Ocean and neighboring seas has shrunk and thinned over the past three decades. The end-of-summer Arctic sea ice extent has almost halved since the early 1980s. A recent NASA study found that since 1958, the Arctic sea ice cover has lost on average around two-thirds of its thickness and now 70 percent of the sea ice cap is made of seasonal ice, or ice that forms and melts within a single year. ![]() A lone Arctic sea ice floe, observed during the Beaufort Gyre Exploration Project in October 2014. (NASA/Alek Petty) «Read the rest of this article» Sections: Technology | No Comments
NASA Study May Improve Future River-Observing SatellitesWritten by Maria-José Viñas
Now, a new study led by researchers at NASA’s Jet Propulsion Laboratory in Pasadena, California, analyzes what it would take for river-observing satellites to become an even more useful tool to mitigate flood damage and improve reservoir management globally in near real-time. ![]() Artist’s illustration of NASA’s planned Surface Water and Ocean Topography (SWOT) satellite over the Amazon basin. The colors depict estimated minimum times for flood waves to travel downstream and reach the ocean, data that can inform requirements of satellites like SWOT that can detect floods. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA reports Arctic Winter Sea Ice Extent second lowest on recordWritten by Maria-José Viñas
On March 17th, the Arctic sea ice cover peaked at 5.59 million square miles (14.48 million square kilometers), making it the second lowest maximum on record, at about 23,200 square miles (60,000 square kilometers) larger than the record low maximum reached on March 7th, 2017. ![]() On March 17th, the Arctic sea ice cover peaked at 5.59 million square miles (14.48 million square kilometers), making it the second lowest maximum on record. (NASA/ Nathan Kurtz) «Read the rest of this article» Sections: Technology | No Comments
NASA reports 2015 Warm Cyclone thinned Arctic Sea IceWritten by Maria-José Viñas
The cyclone formed on December 28th, 2015, in the middle of the North Atlantic, and traveled to the United Kingdom and Iceland before entering the Arctic on December 30th, lingering in the area for several days. ![]() This image shows the winds and warm mass of air associated with a large cyclone that swept the Arctic in late December 2015-early January 2016, thinning and shrinking the sea ice cover. (NASA Goddard’s Scientific Visualization Studio/Alex Kekesi, data visualizer) «Read the rest of this article» Sections: Technology | No Comments
NASA researchers observe Arctic losing it’s older Sea IceWritten by Maria-José Viñas
“What we’ve seen over the years is that the older ice is disappearing,” said Walt Meier, a sea ice researcher at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. ![]() Compare the extension of older sea ice in the Arctic in September 1984 and September 2016. The older ice is thicker and more resistant to melt than new ice, so it protects the sea ice cap during warm summers. In September 1984, there were 1.86 million square kilometers of old ice (5 years or older) left throughout the Arctic sea ice cap during its yearly minimum extent; in September 2016, there were only 110,000 square kilometers of older sea ice left. (NASA’S Scientific Visualization Studio) «Read the rest of this article» Sections: Technology | No Comments
NASA’s airborne survey of polar ice “Operation IceBridge” finishes Spring Campaign in the ArcticWritten by Maria-Jose Viñas
“We collected data over key portions of the Greenland Ice Sheet, like the fast-changing Zachariae Isstrom Glacier, and we got the broad geographic coverage of Arctic sea ice we needed,” said Nathan Kurtz, IceBridge’s project scientist and a sea ice researcher at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. «Read the rest of this article» Sections: Technology | No Comments
NASA researches Surface Melting in Greenland that’s contributing to Sea Level RiseWritten by Maria-José Viñas
Just half a mile (a kilometer) downstream, the river dropped into a seemingly bottomless moulin, or sinkhole in the ice. The low rumble of the waters, the shouted instructions from scientists taking measurements, and the chop of the blades of a helicopter delivering personnel and gear were all that was heard in the frozen landscape. ![]() Laurence Smith (University of California, Los Angeles) deploys an autonomous drift boat equipped with several sensors in a meltwater river on the Greenland ice sheet. (NASA’s Goddard Space Flight Center/Jefferson Beck) «Read the rest of this article» Sections: Technology | No Comments
NASA researchers and National Snow and Ice Data Center reports Melting Season in Arctic lasting longerWritten by Maria-José Viñas
Arctic sea ice has been in sharp decline during the last four decades. The sea ice cover is shrinking and thinning, making scientists think an ice-free Arctic Ocean during the summer might be reached this century. The seven lowest September sea ice extents in the satellite record have all occurred in the past seven years. ![]() An image mosaic of sea ice in the Canadian Basin, taken by Operation IceBridge’s Digital Mapping System on Mar. 28th, 2014. (Digital Mapping System/NASA Ames) «Read the rest of this article» Sections: Technology | No Comments
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