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Canadian ice caps are disappearing, which confirms the scientific prediction of 2017



** Canadian ice caps are disappearing, which confirms the scientific prediction of 2017

This St. Patrick’s Bay ice cap contour, taken from Cryosphere 2017 paper, is based on aerial photography from August 1959, GPS surveys conducted during August 2001, and August 2014 and 2015 from an extended cosmic radiation and reflection radiometer. NASA space energy. (ASTER). It shows the area of ​​St. Patrick’s ice caps in 1959, 2001, 2014 and 2015. Ice caps were much smaller in 2015 than in previous years. Credit: University of Colorado at Boulder

According to NASA satellite images, the ice caps of St. Patrick’s Bay have disappeared on the Hazen Plateau of the northeastern island of Ellesmere in Nunavut, Canada. Scientists and colleagues of the National Snow and Ice Data Center (NSIDC) forecast using a document dedicated to 2017 Cryosphere that the ice caps will melt completely over the next five years, and recent photos from NASA’s Advanced Space Radiometry and Space Radiation Reflection (ASTER) have confirmed that this prediction was accurate.

Mark Serrese, director of the NSIDC, a prominent professor of geography at the University of Colorado Boulder, and lead author of the article, first set foot on the icebergs of St. Patrick’s in 1982 as a young graduate student. He visited the ice caps with his advisor, Ray Bradley of the University of Massachusetts.

“When I first visited these ice caps, they seemed like a permanent fixture of the landscape,” Serrese said. “Watching them die for less than 40 years just tears me off.”

In 2017, scientists compared ASTER satellite data from July 2015 with vertical aerial photographs taken in August 1959. They found that between 1959 and 2015, ice caps were reduced to only five percent of their former area, and decreased significantly between 2014 and 2015 in response to the particularly warm summer of 2015. Ice caps are not in the ASTER photos taken on July 14, 2020.

The icy bays of St. Patrick were half of a group of small ice caps on the Hazen Plateau that formed and probably reached their maximum extent during the Little Ice Age, perhaps a few centuries ago. The ice caps of Murray and Simmons, which make up the other half of the ice platons of the Heisen Plateau, are located at a higher altitude and are therefore much better, although scientists predict that their death is also inevitable.

  • ** Canadian ice caps are disappearing, which confirms the scientific prediction of 2017

    These NASA Advanced Spaceborne Thermal Euse and Reflection Radiosteter (ASTER) satellite images show the location of the icy bays of St. Patrick in the Hazen Plateau of the northeastern island of Ellesmere in Nunavut, Canada. The ice caps were still intact in a photo taken on the left in August 2015. In the photo on the right, taken in July 2020, the ice caps have melted and no longer exist. Credit: Bruce Raup, NSIDC

  • ** Canadian ice caps are disappearing, which confirms the scientific prediction of 2017

    This August 4, 2015 satellite image of NASA’s radiometry and reflection of cosmic radiation and reflection reflects the location of St. Patrick’s ice caps (circled in blue). Since July 2020, satellite images show that these ice caps have disappeared. Credit: Bruce Raup, NSIDC

  • ** Canadian ice caps are disappearing, which confirms the scientific prediction of 2017

    This satellite radiometry and NASA reflection of space radio measurement and reflection from July 14, 2020 shows the location of the once icy bays of St. Patrick’s (area circled in blue). Since July 2020, satellite images show that these ice caps have disappeared. Credit: Bruce Raup, NSIDC

“We have long known that as climate change takes place, the effects will be particularly pronounced in the Arctic,” Serrese said. “But the death of those two little hats I once knew so well made climate change very personal. There are only a few photos and a lot of memories left.”


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More information:
Marc S. Serrese and others. Rapid depletion of ice caps on the Hazen Plateau on the northeastern island of Ellesmere, Nunavut, Canada, Cryosphere (2017). DOI: 10.5194 / tc-11-169-2017

Provided by the University of Colorado at Boulder



Citation: Canadian ice caps are disappearing, confirming scientific forecasts for 2017 (2020, July 31), obtained on July 31, 2020 from https://phys.org/news/2020-07-canadian-ice-caps-scientist.html

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