Nearly 20 feet below the ground of a field of open tundra in the nation’s northernmost community, an icy world gives a picture of the ancient past and the future of this part of the Arctic. (From the alaskabeacon)
by Williams College researchers presented in mid-December at the annual conference of the American Geophysical Union.
Another is sea ice loss. More open water – persisting this year into late November – means more opportunities throughout the year for waves to hit the beach and make contact with permafrost bluffs. That causes “niche-erosion block collapse,” said Tom Ravens, a University of Alaska Anchorage civil engineering professor.
The North Slope Borough in recent years has piled up masses of sand-filled Supersacks, delivered by barge each summer, to keep the sea’s water away from the most vulnerable resources. Beyond the walls of Supersacks, the borough uses heavy equipment to pile up beach sand into a makeshift barrier.The U.S. Army Corps of Engineers is putting the final touches on the design for five miles of what’s known as ato protect the shoreline.
“Now they are at a place where the important infrastructure is right up next to the edge. Their water supply and sewage lagoon are right up against the edge,” Sexauer said. The revetment project is seen as the most practical long-term solution, and Utqiagvik’s position as a service and business hub gives all North Slope communities a stake in it.
Ming Xiao, an engineering professor at Penn State University, stands on Aug. 3 by a piled-up sand berm used as a makeshift barrier to protect parts of Utqiagvik from storm-driven flooding. Xiao is leading a project that uses a fiber-optic cable to track the minute movements of warming and thawing permafrost. , with collaborators from UAF and Virginia Tech University, that uses a buried fiber-optic cable to measure the minute movements within the soil of Utqiagvik’s warming permafrost.
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