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A 1240-Year Record of Arctic Temperatures
Center for the Study of Carbon Dioxide and Global Change ^

Posted on 12/17/2004 2:27:50 AM PST by Exton1

A 1240-Year Record of Arctic Temperatures


Reference
Moore, J.J., Hughen, K.A., Miller, G.H. and Overpeck, J.T.  2001.  Little Ice Age recorded in summer temperature reconstruction from varved sediments of Donard Lake, Baffin Island, Canada.  Journal of Paleolimnology 25: 503-517.

What was done
Lake sediment cores from Donard Lake, Baffin Island, Canada (approximately 66.25°N, 62°W), were analyzed to produce a 1240-year record of average summer temperatures for this region.

What was learned
Over the entire 1240-year period from 750-1990 A.D., summer temperatures averaged
2.9°C.  Anomalously warm decades with summer temperatures as high as 4°C occurred around 1000 and 1100 A.D.  At the beginning of the 13th century, Donard Lake witnessed "one of the largest climatic transitions in over a millennium," as "average summer temperatures rose rapidly by nearly 2°C from 1195-1220 A.D., ending in the warmest decade in the record" with temperatures near 4.5°C.

The rapid warming of the 13th century was followed by a period of extended warmth that lasted until an abrupt cooling event occurred around 1375 A.D.  The decade following 1375 A.D. was one of the coldest in the record and represented the onset of the Little Ice Age on Baffin Island, which lasted for 400 years.  At the modern end of the record, a gradual warming trend occurred over the period 1800-1900 A.D., followed by a dramatic cooling event in 1900 that brought temperatures back to levels consistent with the Little Ice Age, which lasted until about 1950.  Temperatures warmed during the 1950s and 1960s, whereupon they have trended toward cooler conditions to the present.

What it means
Large abrupt swings in temperature appear to be a consistent feature of climate in this region of the world, with temperatures rising and falling by as much as 2°C in as short a time period as a decade.  Such natural temperature variability demonstrates the high degree of difficulty associated with attempting to separate effects of anthropogenic climatic forcing from those of natural causes.

In contradiction of politically-correct climatology, the study also demonstrates the existence of both the Medieval Warm Period and Little Ice Age on Baffin Island.  And it stands in stark contrast to the climate alarmist claim that the latter part of the 20th century experienced "unprecedented" warming, at least in this part of the world, which is, however, where such anthropogenic phenomena are supposed to be most evident.



Page printed from: http://www.co2science.org/journal/2001/v4n32c1.htm


Copyright © Center for the Study of Carbon Dioxide and Global Change


TOPICS: Extended News; News/Current Events
KEYWORDS: antarctic; artic; climatechange; eskimos; globalwarming; globalwarminghoax; hoax
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1 posted on 12/17/2004 2:27:50 AM PST by Exton1
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To: Exton1

Good find!


2 posted on 12/17/2004 2:34:33 AM PST by TigerLikesRooster
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To: Exton1
The rapid warming of the 13th century was followed by a period of extended warmth that lasted until an abrupt cooling event occurred

I knew man was behind all these changes....

3 posted on 12/17/2004 2:38:55 AM PST by Always Right
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To: Always Right
Yes, all those camp fires they were setting to keep warm.
4 posted on 12/17/2004 2:41:47 AM PST by X_CDN_EH (regards wb)
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To: Exton1

Did you know that 10,000 years ago, the amount of oxygen in the air was about 35% and the pressures was twice because the earth was smaller, to day oxygen in some major cities is 22%, at 15 % all life dies


5 posted on 12/17/2004 2:42:18 AM PST by larrye2001
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To: Exton1; cogitator
Such natural temperature variability demonstrates the high degree of difficulty associated with attempting to separate effects of anthropogenic climatic forcing from those of natural causes.

No it is not. You just manipulate the data so all those variabilities go away and you come up with the fairytale hockey-stick theory.

6 posted on 12/17/2004 2:47:05 AM PST by Always Right
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To: larrye2001

Welcome to FR.

Cite your source (other than DU).

Or are you just trolling?


7 posted on 12/17/2004 2:48:32 AM PST by KeyWest
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To: larrye2001

Huh?


8 posted on 12/17/2004 2:49:11 AM PST by Mr Rogers
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To: larrye2001

People were also only an average of 5 inches tall back then because they weren't told to drink their milk as children...


9 posted on 12/17/2004 2:55:26 AM PST by Lurking2Long
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To: larrye2001
Did you know that 10,000 years ago, the amount of oxygen in the air was about 35% and the pressures was twice because the earth was smaller, to day oxygen in some major cities is 22%, at 15 % all life dies

No it wasn't. If the concentration of oxygen were greater than 30 percent, Earth would be a world where fires would be impossible to extinguish. With less than 12 percent oxygen, fires wouldn't burn.

10 posted on 12/17/2004 3:06:21 AM PST by Always Right
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To: KeyWest
Not troll. Flat out loon.

Climate data from 8,000 years BC., 5,000 years before the time of the Pharaohs. Unless this guy is a Geophysicist doing leading edge forensic Archeology he's channeling his navel.
11 posted on 12/17/2004 3:14:47 AM PST by beaver fever
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To: PatrickHenry

An ironic ping (you know what I mean).


12 posted on 12/17/2004 3:14:48 AM PST by Junior (FABRICATI DIEM, PVNC)
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To: Always Right

"I knew man was behind all these changes...."

Excessive chariot exhaust?


13 posted on 12/17/2004 3:19:18 AM PST by Smartaleck
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To: larrye2001
"Did you know..."That's the liberal's intro. It's also a nitice that what follows is BS.
14 posted on 12/17/2004 3:26:46 AM PST by spunkets
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To: blam

ping


15 posted on 12/17/2004 3:27:58 AM PST by Boot Hill (Candy-gram for Osama bin Mongo, candy-gram for Osama bin Mongo!!!)
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To: Smartaleck
"I knew man was behind all these changes...." Excessive chariot exhaust?

No, something much worse. The discovery of baked beans.

16 posted on 12/17/2004 3:28:20 AM PST by Always Right
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To: larrye2001
Did you know that 10,000 years ago, the amount of oxygen in the air was about 35% and the pressures was twice because the earth was smaller, to day oxygen in some major cities is 22%, at 15 % all life dies


17 posted on 12/17/2004 3:38:29 AM PST by humblegunner (And who knows what else?)
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To: Junior

Earth was smaller, dinosaurs roamed, Saturn hovered overhead. Our masters on Uranus watched ...


18 posted on 12/17/2004 3:39:07 AM PST by PatrickHenry (The List-O-Links for evolution threads is at my freeper homepage.)
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To: larrye2001
Did you know that 10,000 years ago, the amount of oxygen in the air was about 35% and the pressures was twice because the earth was smaller, to day oxygen in some major cities is 22%, at 15 % all life dies

Earth was smaller 10,000 yrs ago? Wow. Was it the size of Mars? ...or the Moon? Scary stuff. Oh yeah. We must stop all that stuff we're doing now and try to bring the planet back to the original size - just giving up SUVs will decrease the size of the planet a little bit and increase the pressure... Yes. Err. Store some oxygen as well, so we have at least 16% in reserve, so the life doesn't die. Hmm. And. Err. Yeah. Globalization. Yes. ...and Bush...OMG!... They've got to be stopped. Iraq. Oil. Halliburton. Mmm. Yes. Global warming. Err. ...and stuff... Must be stopped... ...yes, stopped...22%...not 35%...

19 posted on 12/17/2004 3:44:49 AM PST by aliquis
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To: larrye2001

The earth was smaller??? Did someone leave it the dryer too long?


20 posted on 12/17/2004 3:45:32 AM PST by upier (Stop Child abuse - Teach your children English!)
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To: larrye2001

Cool! You managed to get 4 mistakes in one sentence! That is a rare thing on FR. That's usually a DU feature, troll.

What size WAS the earth, BTW?


21 posted on 12/17/2004 3:45:44 AM PST by Right Wing Assault (Wish me a Merry Christmas! I won't report you to the ACLU.)
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To: Exton1
Lake sediment cores from Donard Lake, Baffin Island, Canada (approximately 66.25°N, 62°W), were analyzed to produce a 1240-year record of average summer temperatures for this region.

Sediment cores (snicker) Might as well have had them stick a finger in the water, roll their eyes back chanting, then just start writing estimates. Bout as useful.

22 posted on 12/17/2004 3:46:11 AM PST by Havoc (Reagan was right and so was McKinley. Down with free trade.)
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To: larrye2001

It is hugh and series.


23 posted on 12/17/2004 3:46:54 AM PST by aliquis
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To: Right Wing Assault

Actually, I should make that 5 errors.


24 posted on 12/17/2004 3:49:53 AM PST by Right Wing Assault (Wish me a Merry Christmas! I won't report you to the ACLU.)
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To: Smartaleck

"Excessive chariot exhaust?

No silly, there were no catalytic converters on the horses's exhausts!


25 posted on 12/17/2004 3:50:01 AM PST by nuke rocketeer
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To: aliquis
Dude...don't say stuff like that. I'm waiting for some environmentalist to decide the local granite faces on our mountains in Utah are oxidizing and exhibiting unnatural color. Their answer would be spend millions, erect mountain scaffolds, and begin a rescue by scrubbinbg all the rock down to the original color.
26 posted on 12/17/2004 3:51:53 AM PST by Gum Shoe
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To: Gum Shoe

It won't happen. All you have to do it tell them all the friction from that scrubbing will cause global warming. They'll say, "Oh, yeah, you're right!"


27 posted on 12/17/2004 3:53:50 AM PST by Right Wing Assault (Wish me a Merry Christmas! I won't report you to the ACLU.)
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To: Right Wing Assault

You know some environmentalist wack job is gonna troll through here, read about "scrubbing" oxidation off rocks and think it's a good idea.


28 posted on 12/17/2004 3:58:06 AM PST by Gum Shoe
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To: Gum Shoe
granite faces on our mountains in Utah are oxidizing

Nah, that's easy! Too much oxygen. If we drive more SUVs, there'll be less oxygen, and Earth will get bigger. Therefore, as the pressure drops, the mountains will get cleaner. Simple. Oh bummer, I forgot: all life dies at 15%...

;)

29 posted on 12/17/2004 3:59:12 AM PST by aliquis
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To: Exton1

Does this mean I will die soon or live to see Hillary loose the 2008 election?


30 posted on 12/17/2004 4:00:19 AM PST by bmwcyle (I wear sleepwear therefore I think (When they are off I am single minded))
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To: Gum Shoe
Should keep them out of trouble for a while.
31 posted on 12/17/2004 4:00:45 AM PST by aliquis
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To: bmwcyle

We will ALL die. Remember how they say the Clintons take up all the oxygen?


32 posted on 12/17/2004 4:01:58 AM PST by Right Wing Assault (Wish me a Merry Christmas! I won't report you to the ACLU.)
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To: larrye2001
Did you know that 10,000 years ago, the amount of oxygen in the air was about 35% and the pressures was twice because the earth was smaller, to day oxygen in some major cities is 22%, at 15 % all life dies

Yes, the Earth was a size 32 waist, but now in middle-age it is a 36.

33 posted on 12/17/2004 4:12:20 AM PST by 6SJ7
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To: 6SJ7

34 posted on 12/17/2004 4:20:17 AM PST by Boot Hill (Candy-gram for Osama bin Mongo, candy-gram for Osama bin Mongo!!!)
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To: larrye2001

Get lost troll.


35 posted on 12/17/2004 4:22:44 AM PST by OwnershipSociety
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To: larrye2001

Did you know that you're full of crap?


36 posted on 12/17/2004 4:27:04 AM PST by Sloth (Al Franken is a racist.)
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To: Gum Shoe

You know some environmentalist wack job is gonna troll through here, read about "scrubbing" oxidation off rocks and think it's a good idea.


You may have something there. Let me sleep on it a while.


37 posted on 12/17/2004 4:29:22 AM PST by chainsaw (("We're going to take things away from you on behalf of the common good." - H. Clinton))
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To: Exton1
"Anomalously warm decades with summer temperatures as high as 4°C occurred around 1000 and 1100 A.D. At the beginning of the 13th century, Donard Lake witnessed "one of the largest climatic transitions in over a millennium," as "average summer temperatures rose rapidly by nearly 2°C from 1195-1220 A.D., ending in the warmest decade in the record" with temperatures near 4.5°C."

Ah, yet more research that shows that the "Medieval Climate Optimum" period was indeed global, and not an "anomaly confined to Western Europe (or the Northern Hemisphere)" as the "global warmers" are so fond of claiming.

38 posted on 12/17/2004 5:23:59 AM PST by Wonder Warthog (The Hog of Steel)
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To: Right Wing Assault

Spaceballs again.


39 posted on 12/17/2004 5:30:12 AM PST by bmwcyle (I wear sleepwear therefore I think (When they are off I am single minded))
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To: nuke rocketeer

"No silly, there were no catalytic converters on the horses's exhausts!"

Dung Beetles........apparently not effective though?


40 posted on 12/17/2004 5:31:15 AM PST by Smartaleck
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To: Exton1
"average summer temperatures rose rapidly by nearly 2°C from 1195-1220 A.D., ending in the warmest decade in the record" with temperatures near 4.5°C

Well, of course. Anyone who read their history remembers that Europe was in the dark ages. So all those Europeans probably lit up candles and oil lamps and, thusly, overheated the planet.

[The planet has had temp variations throughout. Global warming has happened before and it will happen again. Global cooling has happened before and it will happen again. Global changes (increased and decreased temps) have happened without much impact from humankind.]
41 posted on 12/17/2004 6:14:30 AM PST by TomGuy (America: Best friend or worst enemy. Choose wisely.)
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To: Boot Hill

LOL! Some of us can still calculate mutual conductance (gm)
and explain space charge compensation on these old critters.


42 posted on 12/17/2004 6:16:17 AM PST by ijcr (Age and treachery will always overcome youth and ability.)
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To: Lurking2Long
People were also only an average of 5 inches tall back then because they weren't told to drink their milk as children...

And many of them died in car accidents because momma guv'mint didn't require seat belts.

You know - I've been hearing about global warming for about 12 years. Shouldn't it be noticeably warmer by now? Yet December in central Illinois is still cold. When is this stuff going to kick in and give my heat bill a rest?
43 posted on 12/17/2004 6:20:23 AM PST by AD from SpringBay (We have the government we allow and deserve.)
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To: larrye2001; RightWhale
"Did you know that 10,000 years ago, the amount of oxygen in the air was about 35% and the pressures was twice because the earth was smaller, to day oxygen in some major cities is 22%, at 15 % all life dies"

I don't believe any of this.

44 posted on 12/17/2004 6:23:47 AM PST by blam
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To: larrye2001
Sounds like you've been into the Preparation H.   Better tell your mommie (if you're still visible.)
45 posted on 12/17/2004 6:34:09 AM PST by jigsaw (God Bless Our Troops.)
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To: larrye2001
"the pressures was twice because the earth was smaller,"

Of course! That's a no-brainer!

Everytime I drive to downtown Houston it takes me longer.
I've always known it was because the distance was expanding!

46 posted on 12/17/2004 6:49:07 AM PST by TexasCowboy (Texan by birth, citizen of Jesusland by the Grace of God)
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To: farmfriend


47 posted on 12/17/2004 6:51:21 AM PST by Libertarianize the GOP (Make all taxes truly voluntary)
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To: ijcr

Did you like the long winded way they took to say the tube had a high Avol ?! Where's Philbrick-Nexus when you need them?

--Boot Hill


48 posted on 12/17/2004 6:55:49 AM PST by Boot Hill (Candy-gram for Osama bin Mongo, candy-gram for Osama bin Mongo!!!)
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To: Exton1
At the beginning of the 13th century, Donard Lake witnessed "one of the largest climatic transitions in over a millennium," as "average summer temperatures rose rapidly by nearly 2°C from 1195-1220 A.D., ending in the warmest decade in the record" with temperatures near 4.5°C.

Global warming created by those dang Europeans and their SUVs! ;o)

49 posted on 12/17/2004 7:00:55 AM PST by SuziQ (W: STILL the President)
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To: Gum Shoe
"are oxidizing and exhibiting unnatural color"

Watching TLC a few nights ago, some guys were trying to find an old city high in the Andes from the description of "a big white rock". The natives kept saying, no white rock around here.

They finally found it, but the white rock had lichen growing all over it with no one around for 400 years to keep it cleaned off.

50 posted on 12/17/2004 7:17:10 AM PST by Deguello
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