Taxonomy term

satellite

Ice (Re)Cap: December 2015

From Antarctica to the Arctic; from polar caps, permafrost and glaciers to ocean-rafted sea ice; and from burly bears to cold-loving microbes, fascinating science is found in every nook and crevasse of Earth’s cryosphere, and new findings are announced often. Here are a few of the latest updates.
 
15 Dec 2015

Map shows where lightning zaps most

Lightning strikes far more often over land than sea and is more concentrated closer to the equator — both testaments to the greater atmospheric instability over those parts of the planet.

29 Aug 2015

Satellites - not just Santa - see holiday lights

 This year, when Santa makes his rounds, he won’t need Rudolph to light his way. In many U.S. cities, the intensity of nighttime lighting increases 20 to 50 percent during the holidays compared to the rest of the year, according to data presented Tuesday by NASA researchers at the annual meeting of the American Geophysical Union (AGU) in San Francisco. The findings are based on two years’ worth of data, collected in 2012 and 2013 from 70 American cities.

18 Dec 2014

Better flood forecasts eyed from space

Satellite measurements of total water storage in river basins — including surface waters, snow, groundwater and soil moisture — may help indicate, months in advance, whether those basins will be predisposed to major flooding, according to new research published in Nature Geoscience. Thus, they could help improve on conventional flood forecasts, which are often based on shorter-term weather forecasts combined with incomplete estimates of basin saturation and offer abbreviated lead times for predictions.

09 Dec 2014

Seasonal ice-cover reduction throughout Arctic waters mapped

Nowhere is climatic warming more evident than in the Arctic. Arctic air has warmed almost twice as much compared to the global average in recent decades, and Arctic sea-ice extent has hit historic lows in the last decade.

25 Oct 2014

Harpooning space debris

Harpooning was first used to spear fish, and later whales, but has yet to be used in space. Now, the European Space Agency (ESA) is considering the ancient technique to capture rogue satellites interfering with important orbits.

18 Oct 2014

Recovery of 1960s sea-ice satellite images wins dark data contest

Scientists from the National Snow and Ice Data Center (NSIDC) and NASA who resurrected 50-year-old satellite images of Arctic and Antarctic sea ice from dusty 35-millimeter film reels took home first prize in an international geoscience data rescue contest sponsored by publisher Elsevier and the Integrated Earth Data Applications project at Columbia University’s Lamont-Doherty Earth Observatory.

25 May 2014

Undergraduates build and launch a satellite to measure atmospheric drag

In 2000, the International Space Station (ISS) was the victim of a severe geomagnetic storm: a wave of solar particles hit Earth’s atmosphere, warming it, expanding it, and increasing its density. In just a few days, the space station's elevation dropped several kilometers. The incident received a lot of attention in the media, but thousands of satellites experience changes in altitude during solar storms.

02 Oct 2013

A day without Glory

On a warm afternoon in early March, the Taurus XL rocket that was prepped for launch at Vandenberg Air Force Base in Southern California looked more like a giant chopstick standing on end than a potential game changer in the debate over climate change science. The barrel-shaped satellite that the rocket carried — named Glory — was designed to deliver critical information about small airborne particles called aerosols.

19 Aug 2011

Crystal Ball EARTH: Space: NASA keeps watch on a changing planet

In 2009, we saw a number of changes on Earth. The average global ocean surface temperature last summer was the warmest on record. Thin seasonal ice has recently replaced thick older ice as the dominant type of ice in the Arctic. And scientists saw that despite a quiet sun with few sunspots, Earth can continue to be bombarded with a high level of solar energy.

11 Dec 2009

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