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Scientists to Unearth Ice Age Secrets from Preserved Tree Rings [ kauri trees, New Zealand ]
ScienceDaily ^ | Tuesday, April 6, 2010 | University of Oxford

Posted on 04/07/2010 7:12:24 PM PDT by SunkenCiv

Oxford University is involved in a research project to unearth 30,000 year old climate records, before they are lost forever. The rings of preserved kauri trees, hidden in New Zealand's peat bogs, hold the secret to climate fluctuations spanning back to the end of the last Ice Age... carbon dating and other analyses of the kauri tree rings. The trees store an immense amount of information about rapid and extreme climate change in the past. For instance, wide ring widths are associated with cool dry summer conditions... Tree rings are now known to be an excellent resource for extracting very precise and detailed data on atmospheric carbon from a particular time period. Therefore this study could help plug a large gap in our knowledge of climate change by extending historical weather records that only date back to the mid-nineteenth century... The research will focus on the last 30,000 years, but some trees date back 130,000 years. The period towards the end of the last Ice Age is particularly difficult to understand. This unique archive of kauri trees is likely to be lost within the next ten years because the timber is so highly-prized for furniture, arts and crafts. Kauri (Agathis australis) are conifer trees buried in peat bogs across northern New Zealand.

(Excerpt) Read more at sciencedaily.com ...


TOPICS: Astronomy; History; Science; Travel
KEYWORDS: astronomy; catastrophism; globalwarminghoax; godsgravesglyphs; gps; greennewdeal; kauritrees; magneticfield; magnetism; newzealand; poleshift; radiocarbon; science

1 posted on 04/07/2010 7:12:24 PM PDT by SunkenCiv
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To: StayAt HomeMother; Ernest_at_the_Beach; 1ofmanyfree; 21twelve; 240B; 24Karet; 2ndDivisionVet; ...

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Gods
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Glyphs
Beware the climate change spin. To all -- please ping me to other topics which are appropriate for the GGG list.
GGG managers are SunkenCiv, StayAt HomeMother, and Ernest_at_the_Beach
 

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2 posted on 04/07/2010 7:12:56 PM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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Stalagmites reveal past climate
by Kristina Bartlett and Devra Wexler
GeoTimes, March 1999
The researchers examined four stalagmites from Crevice Cave, the longest cave known in Missouri, located about 75 miles south of St. Louis. The stalagmites appeared to have been broken by natural forces such as floods or earthquakes and were found about 80 feet below the ground surface, says Dorale. The team determined when the stalagmite layers were deposited, then deduced paleotemperatures and the general types of vegetation growing in the vicinity during that era by examining the carbon and oxygen isotopes within the calcium carbonate. The profile showed that the area had been covered by forest 75,000 years ago, but by 71,000 years ago, it was savannah and by 59,000 years ago, had become a prairie. Between 55,000 and 25,000 years ago, the forest had returned and persisted. Dorale explains that the pattern is consistent with climatological records from the ocean.

3 posted on 04/07/2010 7:16:00 PM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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Carbon clock could show the wrong time
A study led by physicist Warren Beck of the University of Arizona discovered an enormous peak in the amount of carbon-14 in the atmosphere between 45 thousand and 11 thousand years ago. Living organisms and some geological features absorb stable carbon-12 and radioactive carbon-14, which are present in the air in a well-known ratio. Scientists use carbon dating to determine when objects ceased to absorb carbon by measuring how much of the carbon-14 - which has a half-life of 5730 years - has decayed. Beck and colleagues tested slices of a half-metre long stalagmite that grew between 45 000 and 11 000 years ago in a cave in the Bahamas. Galactic cosmic rays create most of the carbon-14 in our atmosphere, while solar cosmic rays generate a smaller fraction. The Earth is partially shielded from galactic cosmic rays by its own magnetic field and the solar magnetic field, which fluctuates as the solar cycle proceeds. These effects are predictable and are thought to have changed little in the last million years - which means they cannot explain the glut of carbon-14. The team speculates that a supernova shock wave could have produced a flurry of cosmic rays.

4 posted on 04/07/2010 7:16:38 PM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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To: SunkenCiv

The wrinkle pattern on Helen Thomas’ face could likely reveal much the same thing.


5 posted on 04/07/2010 7:42:25 PM PDT by tickmeister (tickmeister)
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To: SunkenCiv; All

By 71 thousand years ago, the forest had become savannah. Perhaps this was caused by the sudden drop in world temperatures after the Toba supervolcano 74,000 years ago. Colder weather is drier weather. Incidentally, a bad hurricane season is predicted this year as El Nino is over and Atlantic ocean temperatures are already unusually high.


6 posted on 04/07/2010 7:47:55 PM PDT by gleeaikin
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To: SunkenCiv

The carbon clock is like me looking at rust on a nail and guessing how old it is.


7 posted on 04/07/2010 7:50:48 PM PDT by count-your-change (You don't have be brilliant, not being stupid is enough.)
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To: gleeaikin
" Incidentally, a bad hurricane season is predicted this year as El Nino is over and Atlantic ocean temperatures are already unusually high."

Oh boy!

8 posted on 04/07/2010 7:50:57 PM PDT by blam
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To: steelyourfaith

ping


9 posted on 04/07/2010 9:06:57 PM PDT by Amagi (Yo, Homeland Security: Stay stupid. Stay PC. Don't profile. Look for the bomb not the bomber.)
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To: SunkenCiv

Tree rings have been pretty well debunked as a temperature indicator.


10 posted on 04/07/2010 9:08:10 PM PDT by Straight Vermonter (Posting from deep behind the Maple Curtain)
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To: Amagi; Fiddlstix; Tunehead54; Clive; FrPR; tubebender; marvlus; TenthAmendmentChampion; Carlucci; ..
Thanx !

 




Beam me to Planet Gore !

11 posted on 04/08/2010 3:22:59 AM PDT by steelyourfaith (Warmists as "traffic light" apocalyptics: "Greens too yellow to admit they're really Reds."-Monckton)
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To: blam

” Incidentally, a bad hurricane season is predicted this year as El Nino is over and Atlantic ocean temperatures are already unusually high.”

If you are in the hurricane prediction business, you need to predict a bad season. If you predict a light season and there are many, people will remember your incompetence. If the reverse happens, it turns out that conditions were not as bad as predicted. Works the same for snow predictions.


12 posted on 04/08/2010 6:05:31 AM PDT by Western Phil
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To: Straight Vermonter
"Tree rings have been pretty well debunked as a temperature indicator."

Okay. I was pessimastic until I found this.

13 posted on 04/08/2010 6:17:52 AM PDT by blam
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To: SunkenCiv
Beware the climate change spin.

We have ice core data going back this far, so it does make one wonder if the point of this project is to try to erase the evidence of regular climate cycles and replace it with spin. Maybe I'm just too cynical.

14 posted on 04/08/2010 1:35:32 PM PDT by colorado tanker
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To: colorado tanker

spin, spin, it is: “We have ice core data going back this far”

Also - we have living trees that go back 6000 years. and petrified trees that go much farther. and we have peat bogs in Florida with human bodies that go back 8000 years.

Sorry - 30,000 year trees should be available many places, so it is interesting, but no emergency, ‘lost forever’.


15 posted on 04/09/2010 3:15:04 PM PDT by XBob (Jail the employers of the INVADERS !!)
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One more oldie.



16 posted on 09/06/2021 8:11:32 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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17 posted on 09/06/2021 8:16:28 PM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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