Tree Point Lighthouse Alaska - Search localsearch

alaska.edu

https://www.gi.alaska.edu/alaska-science-forum/nor…

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 ...

alaska.edu

https://www.gi.alaska.edu/alaska-science-forum/cot…

Cottonwood and Balsam Poplar | Geophysical Institute

The Klukwan giant holds the national record for black cottonwood diameter. Its nearest rival, a tree near Salem, Oregon, does hold the national height record. The Klukwan giant belies the belief that trees tend to get smaller the farther north one goes. Both balsam poplar and cottonwood have value for fuel wood, pulp and lumber.

alaska.edu

https://www.gi.alaska.edu/alaska-science-forum/maj…

The majesty and mystery of Alaska yellow cedar | Geophysical Institute

A tree near one of our campsites had a crack at its base through which we could pass the folded saw. Yet the tree was still alive, with just one rope of cambium — the outer bark that transports water and nutrients — snaking up the trunk. A few of its blue-green feathery leaves flagged from the top of what otherwise looked like a snag.

alaska.edu

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Tree Rings and History | Geophysical Institute

A tree's age can be easily determined by counting its growth rings, as any Boy or Girl Scout knows. Annually, the tree adds new layers of wood which thicken during the growing season and thin during the winter. These annual growth rings are easily discernible (and countable) in cross-sections of the tree's trunk. In good growing years, when sunlight and rainfall are plentiful, the growth rings ...

alaska.edu

https://www.gi.alaska.edu/alaska-science-forum/bur…

Burls - Geophysical Institute

Burls, spherical woody growths on the trunks of spruce, birch and other trees, are commonly found throughout wooded parts of Alaska.

alaska.edu

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More on Why Tree Trunks Spiral | Geophysical Institute

I eventually found a tree with a spiral lightning mark and it followed the spiral grain exactly. One tree, of course, proves nothing. "But why should the tree spiral? More speculation here: Foliage tends to be thicker on the south side of the tree because of better sunlight.

alaska.edu

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Trees as Earthquake Fault Indicators | Geophysical Institute

Then using tree ring dating methods, it may be possible to date earthquakes occurring before historical records were kept. The ability to identify and date very large earthquakes occurring within the past thousand years is important in establishing earthquake risk and for predicting future earthquakes.

alaska.edu

https://www.gi.alaska.edu/alaska-science-forum/bur…

Burls and Human Cancer | Geophysical Institute

Photograph of a section cut from a tree with 5 burls that simultaneously grew at the same level on the tree. Annual growth rings can be followed around the tree trunk at center and into each of the burls. The rings show that the growth of burls began when the tree was about 40 years old. This tree was cut on a north slope near timberline by Jim Moore of Fairbanks.

alaska.edu

https://www.gi.alaska.edu/alaska-science-forum/ora…

Orange trees in the Alaska Range | Geophysical Institute

It was a tree disease known as spruce needle rust, which infects only the current year’s needles of white, black and Sitka spruce trees. The orange powder is composed of millions of tiny spores, which the rust fungus uses to reproduce.

alaska.edu

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Formerly Frosty Footing Causes Drunken Forests

By the unique pattern of the tree rings, they determined the tree began its fight to right itself after a thermokarst developed 120 years ago. The same thing that makes trees tipsy causes problems for those of us who choose to live and work on land underlain by permafrost.