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2010 Spike in Greenland Ice Loss Lifted Bedrock, GPS Reveals

By Guest PostDecember 10, 2011Environmentamerican geophysical union, bedrock, climate change, dana john caccamise, eric c kendrick, german aerospace center, gnet, gps stations, grace, gravity recovery and climate experiment, greenland coast, greenland gps network, greenland ice sheet, hao zhou, ice, ice sheet, implications, island, jason e box, jian wang, k brown, melting season, michael bevis, NASA, natural response, ohio state university, san francisco, satellites, southern greenland, temperature, terry j wilson

SAN FRANCISCO – An unusually hot melting season in 2010 accelerated ice loss in southern Greenland by 100 billion tons – and large portions of the island’s bedrock rose an additional quarter of an inch in response.

That’s the finding from a network of nearly 50 GPS stations planted along the Greenland coast to measure the bedrock’s natural response to the ever-diminishing weight of ice above it.

Every year as the Greenland Ice Sheet melts, the rocky coast rises, explained Michael Bevis, Ohio Eminent Scholar in Geodynamics and professor in the School of Earth Sciences at Ohio State University. Some GPS stations around Greenland routinely detect uplift of 15 mm (0.59 inches) or more, year after year. But a temperature spike in 2010 lifted the bedrock a detectably higher amount over a short five-month period – as high as 20 mm (0.79 inches) in some locations. (more…)

Arctic Sea Ice Reaches Lowest 2010 Extent, Third Lowest in Satellite Record

By Guest PostSeptember 17, 2010Environmentarctic sea, atmosphere, earth, greenhouse gases, ice, NASA, natural climate, satellites, serreze, shrinking arctic sea ice, snow and ice data center, university of colorado at boulder

The Arctic sea ice cover appears to have reached its minimum extent for the year, the third-lowest recorded since satellites began measuring sea ice extent in 1979, according to the University of Colorado at Boulder’s National Snow and Ice Data Center.

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Shrinking Atmospheric Layer Linked to Low Levels of Solar Radiation

By Guest PostAugust 27, 2010Environment, Scienceatmosphere, earth, hazards, satellites, solar activity, space station, stanley solomon, sub-orbital rocket, sun, thermosphere, thomas woods, ultraviolet radiation levels

WASHINGTON — Large changes in the Sun’s energy output may cause Earth’s outer atmosphere to contract, new research indicates. A study published today by the American Geophysical Union links a recent, temporary shrinking of a high atmospheric layer with a sharp drop in the Sun’s ultraviolet radiation levels.

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First-of-Its-Kind Map Details the Height of the Globe’s Forests

By Guest PostJuly 21, 20101 commentEnvironment, Scienceaqua, atmosphere, canopy, carbon cycles, carbon dioxide, desdynI, douglas fir, ecosystems, height of the world’s forests, icesat, imaging spectrodiometer, lidar, michael lefsky, modis, NASA, richard Houghton, satellite data, satellites, tallest forests, terra, tropical rain forests, woods hole research center

WASHINGTON — Using satellite data, scientists have produced a first-of-its kind map that details the height of the world’s forests. Although there are other local- and regional-scale forest canopy maps, the new map is the first that spans the entire globe based on one uniform method.

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Tag Archives: satellites

2010 Spike in Greenland Ice Loss Lifted Bedrock, GPS Reveals

Arctic Sea Ice Reaches Lowest 2010 Extent, Third Lowest in Satellite Record

Shrinking Atmospheric Layer Linked to Low Levels of Solar Radiation

First-of-Its-Kind Map Details the Height of the Globe’s Forests