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Nasa forecast: Which cities will flood as ice melts?

Nasa forecast: Which cities will flood as ice melts?

Science
Media playback is unsupported on your deviceA forecasting tool reveals which cities will be affected as different portions of the ice sheet melt, say scientists. It looks at the Earth's spin and gravitational effects to predict how water will be "redistributed" globally. "This provides, for each city, a picture of which glaciers, ice sheets, [and] ice caps are of specific importance," say the researchers. The tool has been developed by scientists at Nasa's Jet Propulsion Laboratory in California. Their findings are published in the journal Science Advances. Senior scientist Dr Erik Ivins said: "As cities and countries attempt to build plans to mitigate flooding, they have to be thinking about 100 years in the future and they want to assess risk in the same way that insurance companies do."...
NASA readies for another JPSS-1 launch attempt

NASA readies for another JPSS-1 launch attempt

Science
Nov. 14 (UPI) -- NASA is preparing for another launch attempt of JPSS-1, NOAA's latest weather satellite.The Joint Polar Satellite System-1 was supposed to be carried into orbit in the wee hours of Tuesday morning, but the United Launch Alliance Delta II rocket's blastoff was delayed after a vehicle alarm sounded just prior to countdown.The launch has since been rescheduled for Wednesday morning at 4:47 a.m. ET. The rocket will liftoff from Space Launch Complex-2 at California's Vandenberg Air Force Base.JPSS-1 is the first of four next-generation weather satellites to be launched on behalf of the National Ocean and Atmospheric Administration.The polar-orbiting satellite will cross the equator 14 times everyday and complete two scans of the entirety of Earth every 24 hours. Its instruments...
Color-discerning capabilities help NASA rover climb, study Mars mountain ridge

Color-discerning capabilities help NASA rover climb, study Mars mountain ridge

Science
Nov. 1 (UPI) -- As NASA's Curiosity traverses a ridge on lower Mount Sharp, the Mars rover is putting its color-discerning capabilities to full use."We're in an area where this capability of Curiosity has a chance to shine," Abigail Fraeman, a scientist at NASA's Jet Propulsion Laboratory in Pasadena, California, said in a news release.Fraeman is leading Curiosity's investigation of Vera Rubin Ridge -- an investigation made possible by the rover's ability to sort light into thousands of wavelengths. To navigate the terrain and to identify minerals and other geologic targets, Curiosity sorts and filters light using both its Mastcam and Chemcam.A variety of scientific filters can be applied to the Mastcam's two eyes to identify whether or not certain wavelengths are being absorbed, instead o...
Nasa carbon space observatory 'watches Earth breathe'

Nasa carbon space observatory 'watches Earth breathe'

Science
Media playback is unsupported on your deviceA Nasa satellite has provided remarkable new insights on how CO2 is moved through the Earth's atmosphere. The Orbiting Carbon Observatory (OCO) tracked the behaviour of the gas in 2015/2016 - a period when the planet experienced a major El Niño event. This climate phenomenon boosts the amount of CO2 in the air. The US space agency's OCO satellite was able to show how that increase was controlled by the response of tropical forests to heat and drought. The forests' ability to draw down carbon dioxide, some of it produced by human activity, was severely curtailed. The science has significant implications because the kind of conditions associated with El Niños are expected to become much more common under global warming. "If future climate is more l
Watch live: NASA streams second of three October spacewalks from ISS

Watch live: NASA streams second of three October spacewalks from ISS

Science
Oct. 9 (UPI) -- NASA TV is streaming the second of three October spacewalks on Tuesday morning. Coverage begins at 6:30 a.m. EDT, but the spacewalk won't commence until 8:05 a.m.Expedition 53 Commander Randy Bresnik of NASA, who led last week's spacewalk -- the first of three -- will once again be joined by Flight Engineer Mark Vande Hei, also of NASA.For Bresnik, who will also lead the third spacewalk on Oct. 18, Tuesday's mission will be his fourth spacewalk. For Vande Hei, the spacewalk will be his second.Last week, the duo used their six hours outside the space station to replace one of the two Latching End Effectors on Canadarm2, the space station's robotic arm. One of the effector's mechanical latches stalled last month."They also accomplished a couple of get-ahead tasks, including r...