Trees growing faster

IndyIan · Apr 22, 2009

Originally Posted By: Tempest
Originally Posted By: Shannow
Would be nice if the graph started at zero rather than 270.

I agree. Virtually all of the charts on line are like those above. I did find one a little better:

The problem with this chart is that it only covers the last two data points on the second chart... I'd say its even more misleading. Although if we had a reasonably science savvy population we probably wouldn't be arguing about graphs of CO2 concentration, we'd be taking real steps to reduce the concentration...

Tempest · Apr 22, 2009

Quote:
we'd be taking real steps to reduce the concentration...

Emissions have gone up astronomically, yet here we have a nice, near linear increase...trending from 1750...Hmmmm....

Samilcar · Apr 22, 2009

Originally Posted By: eljefino
If that chart started at year zero or the beginning of recorded history the last little tick would be pretty steep.

Not as steep as you'd think.

(Keep in mind current CO2 is what, 375ppm?)

Samilcar · Apr 22, 2009

And a (much) longer view.

Tempest · Apr 22, 2009

All those dinosaurs and their SUV's....

MarkC · Apr 22, 2009

Maybe you'd like to read up on Earth's history.

Tempest · Apr 22, 2009

Can you be more specific?

Shannow · Apr 22, 2009

Originally Posted By: Samilcar
Originally Posted By: eljefino
If that chart started at year zero or the beginning of recorded history the last little tick would be pretty steep.

Not as steep as you'd think.

(Keep in mind current CO2 is what, 375ppm?)

and 375 is like what ?

In the black area, past the writing, and off the top off the picture that you posted...pretty dramatic I think.

MarkC · Apr 22, 2009

Don't you wonder about the cause of elevated CO2 concentrations, during the Cretaceous (think "dinosaurs") and the fact that there was a massive decrease in these concentrations late in the period?

Look more closely at charts and graphs and correlate what you see there to what was going on at a given time.

MarkC · Apr 22, 2009

The present= 1950?

Tempest · Apr 22, 2009

Yes Mark, I am aware that things were very different millions of years ago.

I can also see that carbon has increased greatly since 15K years ago...and that was long before SUV's. And this trend has happened many times as the charts show.

The long term charts have a basic flaw, however in that there are few data points. 50 years, the period usually discussed, is nothing in geologic terms. Those charts are obtained by sampling what, every few thousand years? It's like trying to measure a molecule with a ruler. Extraordinary events might not even show up.

Steve S · Apr 22, 2009

Co2 is good stuff for the earth and even better for the politicians that have been reelected over and over to tax.

Samilcar · Apr 23, 2009

Originally Posted By: MarkC
Don't you wonder about the cause of elevated CO2 concentrations, during the Cretaceous (think "dinosaurs") and the fact that there was a massive decrease in these concentrations late in the period?

Look more closely at charts and graphs and correlate what you see there to what was going on at a given time.

I've been reading some interesting stuff regarding the rise of the Himalayan mountains and its effect on C02 levels. The theory is that massive amounts of this exposed rock have acted as a C02 scrubber. This atmospheric C02 decrease has pushed Earth's climate into its more recent ice age cycles.

On that second graph I posted, the rise of this mountain chain 50 mya correlates to the recent C02 drop from 600ppm to 300ppm.

Samilcar · Apr 23, 2009

http://en.wikipedia.org/wiki/Plows,_Plagues_and_Petroleum

Link to a synopsis of this book for anyone interested.

doitmyself · Apr 23, 2009

Samilcar · Apr 23, 2009

Originally Posted By: doitmyself

That first chart is intriguing. Since methane is 20 times more effective as a greenhouse gas than CO2, maybe they're on to something with this cow toot tax.

That second chart is simply delicious.

Tempest · Apr 23, 2009

Originally Posted By: Samilcar
http://en.wikipedia.org/wiki/Plows,_Plagues_and_Petroleum

Link to a synopsis of this book for anyone interested.

People 8000 years ago causing climate change???

According to wiki, there was about 5 million people in 8000BC, total. That's half of current LA.

MarkC · Apr 23, 2009

8000 years ago would not be 8000BC....

MarkC · Apr 23, 2009

Originally Posted By: Samilcar
Originally Posted By: MarkC
Don't you wonder about the cause of elevated CO2 concentrations, during the Cretaceous (think "dinosaurs") and the fact that there was a massive decrease in these concentrations late in the period?

Look more closely at charts and graphs and correlate what you see there to what was going on at a given time.

I've been reading some interesting stuff regarding the rise of the Himalayan mountains and its effect on C02 levels. The theory is that massive amounts of this exposed rock have acted as a C02 scrubber. This atmospheric C02 decrease has pushed Earth's climate into its more recent ice age cycles.

On that second graph I posted, the rise of this mountain chain 50 mya correlates to the recent C02 drop from 600ppm to 300ppm.

It is an interesting theory.
Whatever the cause, it's a good thing the CO2 levels diminished from the mid-Cretaceous high levels ~ 1000ppm(thought to have resulted from huge submarine volcanic eruptions, not saurian SUV drivers, Tempest).

Tempest · Apr 23, 2009

Quote:
8000 years ago would not be 8000BC....

Yes, came from a quick search....

This site shows effectively no difference.
http://www.painofsalvation.com/be/population.htm
It's all a guess anyway.

Quote:
thought to have resulted from huge submarine volcanic eruptions, not saurian SUV drivers, Tempest).

Carbon levels change via natural causes and cycles? Amazing!

Don't hear about that much on the nightly propaganda.

Trees growing faster

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