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Published on July 25th, 2008 | by Timothy B. Hurst

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Robot Planes Getting Bird’s Eye View of Shrinking Greenland Ice Sheet

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July 25th, 2008 by
 
Two low-flying unmanned aircraft are cruising over Greenland this month to closely observe the melting of the Greenland Ice Sheet and its potential contribution to global sea level rise in the coming century. The flights will help scientists determine whether the ice sheet’s melt rate will accelerate in the future.

The drones are flying out of Ilulissat, half way up Greenland’s west coast, for three weeks through the end of this month. Scientists studying the rapidly vanishing Greenland ice sheet need to fill gaps in their data that was collected through satellite imagery.

A spurt of innovative unmanned aircraft missions have recently been flown including those that will deliver maps to help fight this year’s California wildfires, to scrutinize atmospheric pollution levels, and to study Atlantic and Gulf hurricanes.

“We’re seeing the start of a new era in Arctic exploration,” said scientist Betsy Weatherhead, of NOAA’s Earth System Research Laboratory and the Cooperative Institute for Research in Environmental Sciences. “With unmanned aircraft systems, we can fly missions too dangerous, dirty, or dull for humans and address questions we couldn’t even think of addressing before.”

In the ongoing Greenland ice sheet mission, the unmanned “Manta” vehicles are controlled by operators from the aircraft’s manufacturer, Advanced Ceramics Research (ACR), under the direction of on-site scientists. The eight-foot-wide, 45-pound Mantas will carry a digital camera, atmospheric temperature and pressure sensors, and other instruments. Carrying a full 15-pound instrument payload, the Manta can fly for up to six hours at about 40 knots, or 45 miles per hour, according to the Advanced Ceramics website.

Gathering Data on Dynamic Response in Glaciers

Scientists now studying the Jakobshavn glacier in Greenland found its melt rate has doubled in the past decade with the resulting ice stream moving nearly 120 feet per day. According to NASA satellite measurements, the Greenland Ice Sheet is melting at a rate of 57.3 cubic miles per year.

In summer months, the sun melts the top layer of the glaciers to form little lakes throughout the region, many of which vanish within a day. Scientists think these lakes may be emptying out through the ice and lubricating the bottom of the glacier with water. The glacier can then slide more quickly down the valleys, eventually breaking off into icebergs at the coastline.

In an August 2007 article, (sub. req’d.) glaciologist Dr. Konrad Steffen, explained the problem of so-called “dynamic response” this way:

“What happens is that the melting accelerates as meltwater funnels down to the bedrock. At the bottom, the water acts as a lubricant, flowing under the outlet glaciers and allowing the ice to slip into the sea more quickly.”

A bird’s-eye view of the region from 500 to 1,000 feet above the ice will provide fine-scale measurements of the water and surface of the glaciers. Low-flying, unmanned Mantas are able to provide that view by cruising at low altitudes over little-known terrain without putting human life at risk.

Further Reading:

Photos: 1. ACR; 2. ACR; 3. NOAA;

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About the Author

is the founder of ecopolitology and the executive editor at LiveOAK Media, a media network about the politics of energy and the environment, green business, cleantech, and green living. When not reading, writing, thinking or talking about environmental politics with anyone who will listen, Tim spends his time skiing in Colorado's high country, hiking with his dog, and getting dirty in his vegetable garden.



  • http://deerrepellentplants.com/index.php/deer-netting Rueben Pigler

    Good Job on the articles you have here, thank you for putting your time into it!

  • http://deerrepellentplants.com/index.php/deer-netting Rueben Pigler

    Good Job on the articles you have here, thank you for putting your time into it!

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  • Jon Nemo

    Did not the permafrost melt during the Med Warm Period so that the Vikings could settle and farm the south east of Greenland. But as I understand it has not melted yet so not as warm as when the Vikings arrived.

    Nemo

  • Jon Nemo

    Did not the permafrost melt during the Med Warm Period so that the Vikings could settle and farm the south east of Greenland. But as I understand it has not melted yet so not as warm as when the Vikings arrived.

    Nemo

  • Pingback: Robot Planes Get Bird?s Eye View of Shrinking Greenland Ice « Pans

  • Melv

    the flights will help scientists determine whether the ice sheet’s melt rate will accelerate in the future

  • Melv

    the flights will help scientists determine whether the ice sheet’s melt rate will accelerate in the future

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  • zoref

    Its about time we make the most of technology to address the Environmental and human issues

  • zoref

    Its about time we make the most of technology to address the Environmental and human issues

  • gene haynes

    The most interesting scientific thing about worldwide ice-melt is twofold.

    1. That the Earth is a large battery and when the battery warms, the poles are affected first

    2. That melting ice is not entirely a function of temperature > there may not be a simple causal relationship between heat and melt > other factors are at work and we are not able to investigate different causal relationships due to short lifespan, assumption and other factors such as being bound to the physics of our planet

  • gene haynes

    The most interesting scientific thing about worldwide ice-melt is twofold.

    1. That the Earth is a large battery and when the battery warms, the poles are affected first

    2. That melting ice is not entirely a function of temperature > there may not be a simple causal relationship between heat and melt > other factors are at work and we are not able to investigate different causal relationships due to short lifespan, assumption and other factors such as being bound to the physics of our planet

  • richie

    that water looks delcious. probably ice cold…

  • JImmy Crack Corn

    Shrink it baby shrink it!

    JT

    http://www.FireMe.To/udi

  • JImmy Crack Corn

    Shrink it baby shrink it!

    JT

    http://www.FireMe.To/udi

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  • http://www.blogtext.org/andy andy

    Correlation does not mean causation

  • http://www.blogtext.org/andy andy

    Correlation does not mean causation

  • richie

    that water looks delcious. probably ice cold…

  • http://zeeol.com/Blog erichansa

    wow, it is the most beautiful thing I found in digg.

  • http://zeeol.com/Blog erichansa

    wow, it is the most beautiful thing I found in digg.

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