Posted on 10/26/2009 1:08:59 PM PDT by NormsRevenge
SEDIMENT cores from a small Arctic lake in Canada stretching back 200,000 years show unprecedented gains in global warming since 1950, indicating human activity is the likely cause.
"The past few decades have been unique in the past 200,000 years in terms of the changes we see in the biology and chemistry recorded in the cores,'' University of Colorado glaciologist Yarrow Axford said.
"We see clear evidence for warming in one of the most remote places on Earth at a time when the Arctic should be cooling because of natural processes."
Mr Axford is the chief author of the study published in the Proceedings of the National Academy of Sciences.
For thousands of years, environmental changes in a remote lake on Canada's Baffin Island closely matched natural, cyclical climate changes such as those caused by the Earth's periodic wobble as it swings around the sun, the researchers said.
However, lake sediment cores dating from 1950 show that expected climate cooling was overridden by human activity like greenhouse gas emissions.
Researchers were able to reconstruct the local climate over the past 200,000 years by analysing algae, insect fossils and geochemical traces in sediment cores extracted from the 40ha lake.
The cores stretch back 80,000 years further than existing Greenland ice cores, revealing environmental conditions prevalent during two earlier Ice Ages and three interglacial periods.
Researchers found that several types of mosquito-like midges that for many thousands of years thrived in cold climate surrounding the lake suddenly began declining at around 1950; two midge species adapted to the coldest weather disappeared altogether.
(Excerpt) Read more at news.com.au ...
No, we're still warming from the last glacial period. Plus, we're still warming from the Little Ice Age.
Researchers were able to reconstruct the local climate over the past 200,000 years by analyzing algae, insect fossils and geochemical traces in sediment cores extracted from the 40ha lake. The cores stretch back 80,000 years further than existing Greenland ice cores,
200,000 years is 80,000 longer than Greenland??? The Greenland cores actually go back more than 400,000 years and through four cycles. Is this guy lying or is he that ignorant?
How do they assume we caused it? Maybe it just occured about that time and we got blamed for it.
“Yes officer, that’s more or less what he looked like. He was muttering something about Florida at the time...”
Heh heh heh... I like it.
In the 1970s they were doing their best to scare us all about the coming ice age. Looks like we saved ourselves from freezing to death with all of our human activity.
Or were they wrong about the ice age? Or are they wrong about human activity causing climate change?
Personally, I think they need a diaper change. It's clear they have nothing but sh1t for brains and they've pooped themselves all the way to imbecility.
Unprecedented? That’s an outright lie on the face of it. The Medieval Warm Period was still warmer than it is today.
But the sun always makes me sneeze. It’s a neurological phenomenon that doctors can’t really explain. I think it’s a natural reaction to keep one from staring at the sun. Or maybe it’s limited to people with light eyes.
Hah! What about the middle ages warming period that lasted from the 1100’s thru the 1500’s?
Is it just me or are the champions of AGW getting nuttier and nuttier?
Nuttier by the hour.
I wonder how many thousands of things beside Al Gore's global warming could have been responsible for the demise of the midges?
It's certainly not limited to people with light eyes - my eyes are quite dark and sunlight triggers sneezes in me. I seem to recall it being referred to as a "photic sneeze" (triggered by light).
I've read some speculation that it's a holdover response to first seeing the sun after emerging from a dark cave. The sneeze would supposedly clear the nose of accumulated junk from being in the cave.
1.) How do they determine "GLOBAL" trends from the experience of one isolated place. They always said you can't tell how hot it's getting whenever there's a cold snap.
2.)They have 200,000 years of sediment cores they have taken. There is no way they can devine a 60 year trend in that. 1,000 years maybe, 10,000 years probably, yet they only have the current records going back 60 years.
People see what they want to see.
Details Details!
now that was a chunk of ice .. a big one, the one that covered part of europe.. brrrrr
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http://www.metatech.org/07/ice_age_global_warming.html
Ice ages happen with regularity every 11,500 years. The last mini ice age ended almost 11,500 years ago
I’ve always thought it might be that the sensors or nerves for the sinuses and the eyes are so close together that sometimes the signals get “crossed”. And an eye irritant (the bright sun) sometimes gets picked up as nasal irritation. I often will look at a ceiling light to get out a hesitant sneeze to give it an extra “push”!
Please fill us in on which of the Greenland stations went as far back as Vostok.
a holdover response to first seeing the sun after emerging from a dark cave. The sneeze would supposedly clear the nose of accumulated junk from being in the cave.
cool. an auto-hock-a-loogie gene..
Yep, helps me to (i.e., light inside helps to get a sneeze out).
Note that they are actually measuring isotopes.
Oops, I was misreading the thread. Thought you were referring to the ice cores. My mistake.
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