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Topic: NASA’s Earth Science News TeamWritten by Carol Rasmussen
The light is far too dim for us to notice under normal circumstances, but it can be measured with a spectrometer. Called solar-induced fluorescence (SIF), it’s the most accurate signal of photosynthesis that can be observed from space. That’s important because, as Earth’s climate changes, growing seasons worldwide are also changing in both timing and length. ![]() This honeysuckle is glowing in response to a high-energy ultraviolet light rather than to the Sun, but its shine is similar to the solar-induced fluorescence that OCO-3 will measure. (©Craig P. Burrows) «Read the rest of this article» Sections: Technology | No Comments
NASA’s OCO-3 instrument brings new techniques, technologies to study Carbon Dioxide on Earth to International Space StationWritten by Carol Rasmussen
A follow-on to the still-active OCO-2 mission, OCO-3 will bring not only a new vantage point but new techniques and new technologies to NASA’s carbon dioxide observations. Why are we launching a new carbon observatory? Read on. ![]() Illustration of NASA’s OCO-3 mounted on the underside of the International Space Station. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Operation IceBridge has explored Alaska’s Mountain Glaciers for almost a decadeNASA’s Earth Science News Team
In almost a decade of operations, the Operation IceBridge Alaska team has more than doubled the number of mountain glaciers surveyed in the state known as “The Last Frontier.” Data from the mission has put numbers to the loss of Alaskan glaciers from 1994 to 2013: 75 gigatons of ice every year. ![]() In Alaska, five percent of the land is covered by glaciers that are contributing to sea level rise in ways disproportionately large to their size. A small airborne campaign has been monitoring these changes since 2009. (NASA) «Read the rest of this article» Sections: Technology | No Comments
NASA says Greenland’s fastest moving, fastest thinning Glacier is slowing, thickeningWritten by Carol Rasmussen
Jakobshavn is now flowing more slowly, thickening, and advancing toward the ocean instead of retreating farther inland. The glacier is still adding to global sea level rise – it continues to lose more ice to the ocean than it gains from snow accumulation – but at a slower rate. «Read the rest of this article» Sections: Technology | No Comments
NASA data shows Arctic Sea Ice 2019 Wintertime Extent Is Seventh LowestWritten 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’s Oceans Melting Greenland mission still making discoveriesWritten by Carol Rasmussen
With two or three field projects a year since 2016, no wonder OMG has made the most comprehensive measurements yet of how ocean water lapping at the undersides of Greenland’s melting glaciers affects them. All that data has answered a lot of existing questions – and it’s raised plenty of new ones. «Read the rest of this article» Sections: Technology | No Comments
NASA Finds Possible Second Impact Crater Under Greenland IceWritten By Maria-José Viñas
If the second crater, which has a width of over 22 miles, is ultimately confirmed as the result of a meteorite impact, it will be the 22nd largest impact crater found on Earth. ![]() Just 114 miles from the newly-found Hiawatha impact crater under the ice of northwest Greenland, lies a possible second impact crater. The 22-mile wide feature would be the second crater found under an ice sheet, and if confirmed, would be the 22nd-largest crater on Earth. (NASA’s Goddard Space Flight Center/ Jefferson Beck) «Read the rest of this article» Sections: Technology | No Comments
NASA studies elements that make a Stable Landslide into a disastrous oneWritten by Carol Rasmussen
For the first time, researchers at NASA’s Jet Propulsion Laboratory in Pasadena, California, and collaborating institutions have documented the transition of a stable, slow-moving landslide into catastrophic collapse, showing how drought and extreme rains likely destabilized the slide. ![]() The Mud Creek landslide in photographic image. The radar velocity map shows the pre-collapse (solid line) and post-collapse (dashed line) extent of the sliding area, with faster sliding velocities before the collapse shown in darker shades of red. The highest velocities were about 16 inches (40 centimeters) per year. (Google/SIO/NOAA/U.S. Navy/NGA/GEBCO/Landsat/Copernicus) «Read the rest of this article» Sections: Technology | No Comments
NASA study shows Asia’s Glaciers moving slower due to Ice LossWritten by Carol Rasmussen
For more than a decade, satellite data have documented that the glaciers were thinning as the melt rates on their top surfaces increased. ![]() Glaciers in the Karakoram Range of Pakistan, one of the mountain regions studied in the new research. (Université Grenoble Alpes/IRD/Patrick Wagnon) «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
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