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Gizmorama - 9,500-year-old tree is discovered
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Good Morning,
TGIF! I hope you have enjoyed this weeks articles. Did you
hear about the earthquake that happened in Illinois this
morning. I am kind of disappointed, I was awake when it
happened, but didn't feel anything. I guess I will have to
wait for the next one.
Have a great weekend,
Erin
Questions? Comments? Email me at: mailto:gizmo@gophercentral.com
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Gizmorama forum. Check it out here...
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9,500-year-old tree is discovered
The world's oldest living tree -- a 9,550-year-old spruce --
has been discovered in Sweden's Dalarna province, a university
professor said. Umea University Professor Leif Kullman said
the discovery was made under the crown of a spruce on Fulu
Mountain in central Sweden where scientists found four
"generations" of spruce remains in the form of cones and
wood produced from higher ground. Researchers said the old
tree survived cooler summer conditions during the past 10,000
years and, more recently, a gradual warming, by its ability
to push out another trunk as older ones die. Other very old
trees, including three 375-, 5,660- and 9,000-years-old were
also discovered. Since spruce trees can multiply with root
penetrating braches, they can produce exact copies, or clones,
researchers said. The trees' ages were determined in a process
called carbon-14 dating at a U.S. laboratory.
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Changing jet streams may alter storm paths
U.S. scientists say changes in the Earth's jet streams, possibly
caused by global warming, might affect storm paths and intensity,
including hurricanes. Jet streams -- high-altitude bands of
fast-moving winds -- are shifting, said Carnegie Institution
researchers Ken Caldeira and Cristina Archer. They found that
from 1979 to 2001, the jet streams in both hemispheres rose in
altitude and shifted toward the poles. At the same time, northern
hemisphere jet streams weakened. Since jet streams are the
driving factor for weather conditions, said Archer, changes
in the jets have the potential to affect large populations and
major climate systems. Caldeira and Archer, from Carnegie's
Department of Global Ecology in Stanford, Calif., said hurricanes'
development tends to be inhibited by jet streams. Therefore
hurricanes might become more powerful and more frequent as the
jet streams move away from sub-tropical zones where hurricanes
are born. The scientists said the changes fit the predictions
of several global warming models, although theirs is the first
study to use observation-based datasets to examine trends in all
the jet stream parameters. The research appears in the journal
Geophysical Research Letters.
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NASA readying moon mission spacecraft
The U.S. space agency says it has started installing instruments
aboard the Lunar Reconnaissance Orbitor, or LRO, that will
examine the moon. The National Aeronautics and Space
Administration says its engineers and technicians are working
24 hours a day at the Goddard Space Flight Center in Greenbelt,
Md., to ready the spacecraft for testing and eventual launch
later this year. "The spacecraft really is coming together
now," said Cathy Peddie, LRO deputy project manager at Goddard.
"We are in the space assembly homestretch and making solid
progress. You can begin to see what LRO will look like in
all of its glory." Four of six instruments have been mated to
the spacecraft, including a cosmic ray telescope, a mapping
instrument that will scan the lunar surface in the far
ultraviolet spectrum and a radiometer that will measure
surface as well as sub-surface temperatures from orbit, thereby
identifying cold traps, potential ice deposits and even
landing hazards. The satellite is to be launched from the
Kennedy Space Center later this year.
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