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  • Cottonwood and Balsam Poplar | Geophysical Institute
    Balsam poplar is the most widespread broadleaf tree in Alaska; it ranges even farther north and west than another close relative, the quaking aspen Close up, it is easy to distinguish between balsam poplar and quaking aspen from the leaves and, to a lesser extent, by the branching structure
  • Leaves | Geophysical Institute
    Obviously there is a greater chance of wide variation in the leaves growing from those trees and shrubs such as poplar and highbush cranberry that have indeterminate shoot growth Also, if one wishes to identify the variety of a tree by its leaves, one should be sure to gather leaves from the old growth
  • Calling lost chickadees in far north poplars | Geophysical Institute
    Balsam poplar is the largest tree species on Alaska's North Slope Photo by Sara Wilbur A gray-headed chickadee feeds along the Canning River in northern Alaska in 2015 Photo by Aaron Lang Seth Beaudreault, Toolik Field Station naturalist, and Tom Glass, Geophysical Institute postdoctoral researcher, prepare for an interview within a poplar stand
  • Northern Tree Habitats | Geophysical Institute
    Interior Alaskan forests have only six native tree species: white spruce, black spruce, quaking aspen, balsam poplar, larch (tamarack) and paper birch Northern Canadian forests have all of those, plus jack pine, balsam fir and lodgepole pine Since northern Canada and interior Alaska share the same grueling climate and extremes of daylength, why are the Canadian tree species absent from
  • Trees for a Cold Climate | Geophysical Institute
    The forests contain only a handful of families, white spruce, black spruce, poplar, birch, willow, with the odd tamarack or over-grown alder thicket providing scant variety Back on the ground, I did a little research on why so few tree types grow naturally in the neighborhood
  • GI Quarterly Vol. 6 No. 2 | Geophysical Institute
    Since it was established by an Act of Congress in 1946, scientists at the Geophysical Institute have studied geophysical processes from the center of the Earth to the surface of the sun and beyond, turning data and observations into information useful for state, Arctic and national priorities
  • 301 Moved Permanently
    Moved Permanently The document has moved here
  • Beavers slapping tails on far-north waters | Geophysical Institute
    Signs of the American beaver in Alaska: A cut poplar tree on the upper Tanana River and a dam on Phelan Creek near Isabel Pass in the Alaska Range Ned Rozell photos
  • Media Inquiries | Geophysical Institute
    Since it was established by an Act of Congress in 1946, scientists at the Geophysical Institute have studied geophysical processes from the center of the Earth to the surface of the sun and beyond, turning data and observations into information useful for state, Arctic and national priorities
  • Tsunami Hazard Assessment | Geophysical Institute
    The Alaska-Aleutian subduction zone has the greatest earthquake potential in the Pacific Ocean and produced several major tsunamis in the 20th century For example, the historic 1946 and 1957 Aleutian, and 1964 Alaska tsunamis resulted in damage and loss of life not only in Alaska, but also in numerous locations around the Pacific Basin To mitigate tsunami hazard along the Alaska coast and





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