Originally posted by network dude
Just how exactly are you so sure about this? Cycles have happened in the past causing the exact situation we are in right now, but this time
it's different? This is the reason I have such a hard time believing any information you present. You think that you are right and everyone else is
delusional. And seem completely incapable of entertaining any new data because the guys on the tree hugger site you frequent try to discredit anyone
who doesn't fall into their agenda.
Yes, this time it is different. In the past there weren't human influences emitting billions of tonnes of a major GHG every year, concreting
ecosystems, slashing and burning forests etc etc.
lol, I don't frequent any 'treehugger' site. Do you mean woodfortrees.org? It's just an online data repository that allows presentation of the
most recent climate datasets. The alternative is to download the files and do the same in Excel or a stats package. Just a convenient site.
'Can't see the wood for the trees' might be something you want to ponder.
sorry, I seem to have lost interest in your apparent interest in getting rabbits high. I have no idea what you are rambling about.
lol, thought it was clear enough. No rabbits were harmed in the development of that analogy.
Sorry you can't think your way through it.
The biggest problem I have with GHG emmisions being a large part of your equation is the volcanic eruptions. One eruption like Mt. St.
Hellens. here is a bit of data about that eruption. You can't spout the junk about
GHG without factoring in things like that.
Volcanoes emit a fraction of the CO2 humans do every year.
But if you mean the effect of sulphates, yeah, they are important enough to be included in models like the one Hansen used to make predictions into
this century. Less than 6 months after the Pinatubo eruption Hansen submitted a paper from a model run predicting its effects on climate. And they
predicted it well.
Potential climate impact of Mount Pinatubo eruption
Potential climate impact of Mount Pinatubo eruption
James Hansen
NASA Goddard Space Flight Center Goddard Institute for Space Studies, New York
Andrew Lacis
NASA Goddard Space Flight Center Goddard Institute for Space Studies, New York
Reto Ruedy
NASA Goddard Space Flight Center Goddard Institute for Space Studies, New York
Makiko Sato
NASA Goddard Space Flight Center Goddard Institute for Space Studies, New York
We use the GISS global climate model to make a preliminary estimate of Mount Pinatubo's climate impact. Assuming the aerosol optical depth is nearly
twice as great as for the 1982 El Chichon eruption, the model forecasts a dramatic but temporary break in recent global warming trends. The
simulations indicate that Pinatubo occurred too late in the year to prevent 1991 from becoming one of the warmest years in instrumental records, but
intense aerosol cooling is predicted to begin late in 1991 and to maximize late in 1992. The predicted cooling is sufficiently large that by mid 1992
it should even overwhelm global warming associated with an El Nino that appears to be developing, but the El Nino could shift the time of minimum
global temperature into 1993. The model predicts a return to record warm levels in the later 1990s. We estimate the effect of the predicted global
cooling on such practical matters as the severity of the coming Soviet winter and the dates of cherry blossoming next spring, and discuss caveats
which must accompany these preliminary simulations.
Received 3 October 1991; accepted 17 October 1991
You seem to think that climate scientists don't focus on such issues. Hansen's model was put together in the late 80s. That's 20 years ago, and his
run from the late 80s includes intermittent volcanic eruptions. Although the model run had a volcano in 1995, rather than 1991.
So when you see that the earth cooled 1.3 degrees because of a single volcano, then it heated back up. And then you wonderful people claimed
"Global Warming"
It was actually "Global Equalization".
Yeah, the sulphates from volcanoes lead to cooling of the climate. Those are the sort of natural influences, pretty unpredictable ones, that are
well-known. You still don't seem to get the point. Even if a volcano goes boom tomorrow, it doesn't negate the influence of human effects. It would
just offset them, they are still there. The cooling is temporary.
Are you aware of how many volcanoes erupt under the sea? The GHG are actually "gases" and what do we know about gas? if it is lighter than
air it will rise. So where in all your data is that information factored in?
We release twice the amount of CO2 required to account for the yearly increase of CO2 in the atmosphere. 28 billion tonnes of the stuff every year.
Half of it is absorbed by ocean and land sinks.
These same undersea volcanoes would have been knocking around for the last 2000 years yet CO2 levels were very stable - it's only since
industrialisation that levels of various GHGs have started to increase rapidly.
We are the added extra here, not long-established undersea volcanoes.
[edit on 10-11-2009 by melatonin]