What ended the Ice Age before that one, and the one before that, and the one before that? I think we are all in agreement that there is temperature variance on a daily, seasonally, annual AND longer timeframes. While we don’t know exactly why this happens (obviously the cycle of the sun, the rotation and tilt of the earth, the distance of the earth to the sun, Volcanoes and many other reason including methane emissions from cattle are among the reasons). All of these things impact and are part of the cycle of our climate, but prior to humans there have not been the sudden and massive amount of greenhouse gasses, especially carbon from the burning of fossil fuels and coal in our atmosphere at once. And that number is increasing by the minute. Look at the charts containing the CO2 levels and temperature and see if there is any correlation between human activities and our climate. If you can’t make the connection, maybe a scientist can explain it to you.
“It is a truly global issue and can only be tackled if we work together.”
Yes, we must do something. After all, the sun’s up there heating things up all the time, and the earth’s crust floats on a bzillion tons of molten rock and iron.
Yes, we must do something about all of this.
A Record of Millennial-Scale Climate Variability from Northernmost Europe
——————————————————————————–
Reference
Allen, J.R.M., Long, A.J., Ottley, C.J., Pearson, D.G. and Huntley, B. 2007. Holocene climate variability in northernmost Europe. Quaternary Science Reviews 26: 1432-1453.
What was done
The authors analyzed pollen characteristics within sediment cores retrieved from a small unnamed lake located at 71°02’18″N, 28°10’6.6″E near the coast of Nordkinnhalvoya, Finnmark, Norway, after which they used the results of this effort to construct a climatic history of the area over the course of the Holocene.
What was learned
Allen et al. found that “regional vegetation responded to Holocene climatic variability at centennial-millennial time scales.” Within the timeframe that most interests us – and which is of most significance for evaluating the nature of modern global warming – they report that “the most recent widely documented cooling event, the Little Ice Age of ca 450-100 cal BP, also is reflected in our data by a minimum in Pinus:Betula [pollen] ratio beginning ca 300 cal BP and ending only in the recent past,” and they add that “the Dark Ages cool interval, a period during which various other proxies indicate cooling in Fennoscandia and beyond, is evident too, corresponding to lower values of Pinus:Betula [pollen] ratio ca 1600-1100 cal BP.” In addition, they state that “the Medieval Warm Period that separated the latter two cool intervals also is strongly reflected in our data, as is the warm period around two millennia ago during which the Roman Empire reached its peak.”
What it means
These findings are but another common example of an important aspect of earth’s climate and how it operates: it oscillates back and forth between centennial-scale intervals of relative cold and warmth with a full-period temporal mean of approximately 1500 years (see Climate Oscillations (Millennial Variability) in our Subject Index). Viewed in this light, the development of the Current Warm Period over the past century or so is readily recognized to be nothing more than the most recent – and expected – manifestation of this natural cycling of earth’s climate; and this knowledge suggests that our current relative warmth is likely not a response to the historical increase in the atmosphere’s CO2 concentration. It is a totally independent phenomenon. http://www.co2science.org/scripts/CO2ScienceB2C/articles/V10/N34/C2.jsp
You say that cattle emissions are responsible for ending past Ice Ages? The peak of the last ice age was 22,000 years ago. How many bovines were domesticated then?
“…prior to humans there have not been the sudden and massive amount of greenhouse gasses, especially carbon from the burning of fossil fuels and coal in our atmosphere at once.”
Hmmm… As you read this, 20 volcanoes are erupting throughout the world. In the past 10,000 years 1,300 have erupted and estimates suggest that there have been more than a million underwater explosions. In 1815 Mt. Tambora in Indonesia sent about 150 cubic kilometres of ash (150 times more than was produced when Mount St Helens erupted) 44km into the sky and spread for 1,300km. Toba in Sumatra was worse, and Krakatoa was as bad. Humanity has not polluted the atmosphere a fraction as bad.
So you’re all wet, but if you still need to ease your guilty conscience for being human, vote Democrat.
So you assume I am a Democrat? Interesting, I am a registered Independent. I believe the entrenched two-party system is one of the many flaws of our current system. Did I say anything about your political preference or religious beliefs? Should I assume you are a Christian fundamentalist who supports Governor Huckabee and believes that Dinosaurs co-existed with humans? I suppose you believe in something as obviously based in scientific fact as that. I know it is hard for you far-right Americans whose beliefs are out of the mainstream to not take every argument to a personal level.
Before I present more facts, I want to understand this statement:
“In 1815 Mt. Tambora in Indonesia sent about 150 cubic kilometers of ash (150 times more than was produced when Mount St Helens erupted) 44km into the sky and spread for 1,300km. Toba in Sumatra was worse, and Krakatoa was as bad. Humanity has not polluted the atmosphere a fraction as bad.”
Are you referencing a single Volcano erupting (Tambora) or the combination of (Tambora & Krakatoa) when you say that Humanity hasn’t polluted “…a fraction as bad”.
As for your party affiliation, I didn’t try to guess which one you belonged to, I advised you to vote Democrat to relieve your guilt for being human. They’ll certainly punish us enough to pay for all of our sins.
Antarctic volcanoes identified as a possible culprit in glacier melting http://www.iht.com/articles/2008/01/20/europe/climate.php
Another factor might be contributing to the thinning of some of the Antarctica’s glaciers: volcanoes.
In an article published Sunday on the Web site of the journal Nature Geoscience, Hugh Corr and David Vaughan of the British Antarctic Survey report the identification of a layer of volcanic ash and glass shards frozen within an ice sheet in western Antarctica.
“This is the first time we have seen a volcano beneath the ice sheet punch a hole through the ice sheet” in Antarctica, Vaughan said.
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What ended the Ice Age before that one, and the one before that, and the one before that? I think we are all in agreement that there is temperature variance on a daily, seasonally, annual AND longer timeframes. While we don’t know exactly why this happens (obviously the cycle of the sun, the rotation and tilt of the earth, the distance of the earth to the sun, Volcanoes and many other reason including methane emissions from cattle are among the reasons). All of these things impact and are part of the cycle of our climate, but prior to humans there have not been the sudden and massive amount of greenhouse gasses, especially carbon from the burning of fossil fuels and coal in our atmosphere at once. And that number is increasing by the minute. Look at the charts containing the CO2 levels and temperature and see if there is any correlation between human activities and our climate. If you can’t make the connection, maybe a scientist can explain it to you.
“It is a truly global issue and can only be tackled if we work together.”
Yes, we must do something. After all, the sun’s up there heating things up all the time, and the earth’s crust floats on a bzillion tons of molten rock and iron.
Yes, we must do something about all of this.
A Record of Millennial-Scale Climate Variability from Northernmost Europe
——————————————————————————–
Reference
Allen, J.R.M., Long, A.J., Ottley, C.J., Pearson, D.G. and Huntley, B. 2007. Holocene climate variability in northernmost Europe. Quaternary Science Reviews 26: 1432-1453.
What was done
The authors analyzed pollen characteristics within sediment cores retrieved from a small unnamed lake located at 71°02’18″N, 28°10’6.6″E near the coast of Nordkinnhalvoya, Finnmark, Norway, after which they used the results of this effort to construct a climatic history of the area over the course of the Holocene.
What was learned
Allen et al. found that “regional vegetation responded to Holocene climatic variability at centennial-millennial time scales.” Within the timeframe that most interests us – and which is of most significance for evaluating the nature of modern global warming – they report that “the most recent widely documented cooling event, the Little Ice Age of ca 450-100 cal BP, also is reflected in our data by a minimum in Pinus:Betula [pollen] ratio beginning ca 300 cal BP and ending only in the recent past,” and they add that “the Dark Ages cool interval, a period during which various other proxies indicate cooling in Fennoscandia and beyond, is evident too, corresponding to lower values of Pinus:Betula [pollen] ratio ca 1600-1100 cal BP.” In addition, they state that “the Medieval Warm Period that separated the latter two cool intervals also is strongly reflected in our data, as is the warm period around two millennia ago during which the Roman Empire reached its peak.”
What it means
These findings are but another common example of an important aspect of earth’s climate and how it operates: it oscillates back and forth between centennial-scale intervals of relative cold and warmth with a full-period temporal mean of approximately 1500 years (see Climate Oscillations (Millennial Variability) in our Subject Index). Viewed in this light, the development of the Current Warm Period over the past century or so is readily recognized to be nothing more than the most recent – and expected – manifestation of this natural cycling of earth’s climate; and this knowledge suggests that our current relative warmth is likely not a response to the historical increase in the atmosphere’s CO2 concentration. It is a totally independent phenomenon.
http://www.co2science.org/scripts/CO2ScienceB2C/articles/V10/N34/C2.jsp
Chilly,
Come on. Bringing facts into this issue. The rest of us just want to politicize the issue. Good for you.
Chlly’s post is a bit shorter than previous ones. What happened?
Arthritis.
Thanks… good one.
So what I posted is wrong? Please show your work.
You say that cattle emissions are responsible for ending past Ice Ages? The peak of the last ice age was 22,000 years ago. How many bovines were domesticated then?
http://www.esd.ornl.gov/projects/qen/nerc130k.html
“…prior to humans there have not been the sudden and massive amount of greenhouse gasses, especially carbon from the burning of fossil fuels and coal in our atmosphere at once.”
Hmmm… As you read this, 20 volcanoes are erupting throughout the world. In the past 10,000 years 1,300 have erupted and estimates suggest that there have been more than a million underwater explosions. In 1815 Mt. Tambora in Indonesia sent about 150 cubic kilometres of ash (150 times more than was produced when Mount St Helens erupted) 44km into the sky and spread for 1,300km. Toba in Sumatra was worse, and Krakatoa was as bad. Humanity has not polluted the atmosphere a fraction as bad.
So you’re all wet, but if you still need to ease your guilty conscience for being human, vote Democrat.
So you assume I am a Democrat? Interesting, I am a registered Independent. I believe the entrenched two-party system is one of the many flaws of our current system. Did I say anything about your political preference or religious beliefs? Should I assume you are a Christian fundamentalist who supports Governor Huckabee and believes that Dinosaurs co-existed with humans? I suppose you believe in something as obviously based in scientific fact as that. I know it is hard for you far-right Americans whose beliefs are out of the mainstream to not take every argument to a personal level.
Before I present more facts, I want to understand this statement:
“In 1815 Mt. Tambora in Indonesia sent about 150 cubic kilometers of ash (150 times more than was produced when Mount St Helens erupted) 44km into the sky and spread for 1,300km. Toba in Sumatra was worse, and Krakatoa was as bad. Humanity has not polluted the atmosphere a fraction as bad.”
Are you referencing a single Volcano erupting (Tambora) or the combination of (Tambora & Krakatoa) when you say that Humanity hasn’t polluted “…a fraction as bad”.
Scientists estimated that Pinatubo’s eruption added more aerosols (light gases and particles) than all human-caused ‘greenhouse gases’ since the industrial revolution.
http://www.csu.edu.au/faculty/arts/sslib/aemf/HDS/chapter_11.htm
As for your party affiliation, I didn’t try to guess which one you belonged to, I advised you to vote Democrat to relieve your guilt for being human. They’ll certainly punish us enough to pay for all of our sins.
Antarctic volcanoes identified as a possible culprit in glacier melting
http://www.iht.com/articles/2008/01/20/europe/climate.php
Another factor might be contributing to the thinning of some of the Antarctica’s glaciers: volcanoes.
In an article published Sunday on the Web site of the journal Nature Geoscience, Hugh Corr and David Vaughan of the British Antarctic Survey report the identification of a layer of volcanic ash and glass shards frozen within an ice sheet in western Antarctica.
“This is the first time we have seen a volcano beneath the ice sheet punch a hole through the ice sheet” in Antarctica, Vaughan said.
Check it out.