Global Warming
- Thread starter geoffw
- Start date
hmmm...
I'm disinclined to treat the greatest threat to modern society with quite as much humour.
There was a good Big Idea broadcast on Sunday on the ABC touching on the topic (http://www.abc.net.au/rn/bigideas/stories/2006/1702863.htm).
Good, aka - all the information to hand is outside the predictions, to the negative side.
Of course, most people prefer to simply not know - that way they can act surprised
Cheers,
Aceyducey
I'm disinclined to treat the greatest threat to modern society with quite as much humour.
There was a good Big Idea broadcast on Sunday on the ABC touching on the topic (http://www.abc.net.au/rn/bigideas/stories/2006/1702863.htm).
Good, aka - all the information to hand is outside the predictions, to the negative side.
Of course, most people prefer to simply not know - that way they can act surprised
Cheers,
Aceyducey
Acey,
You seem to be very knowledgable on this subject. Are you able to shed some light on Global Dimming? I watched a show on the ABC a while ago which suggested that global dimming is in fact a bigger threat than global warming.
Sorry to hijack your thread Geoff.
You seem to be very knowledgable on this subject. Are you able to shed some light on Global Dimming? I watched a show on the ABC a while ago which suggested that global dimming is in fact a bigger threat than global warming.
Sorry to hijack your thread Geoff.
Hi Folks
I recently did a Buteyko breathing coarse which is designed to lift the levels of Carbon dioxide in the lungs to around 5.5 to 6.5%. Interestingly, the physiotherapist who taught the technique made a statement, which surprised me at the time. She said "bring on global warming as it will increase the level of carbon dioxide in the atmosphere to a more beneficial level for our general well being. She also said that the current levels of CO2 are around 2% but back when dinosaurs roamed the planet the level was much greater (around 9%)
Who is right in this debate?
All I know is, because of my doing the Buteyko breathing course I no longer shake the house foundations with snoring.
regards
Simon
ZZZZZZZzzzzzzzzz-------zz-----------z-----
I recently did a Buteyko breathing coarse which is designed to lift the levels of Carbon dioxide in the lungs to around 5.5 to 6.5%. Interestingly, the physiotherapist who taught the technique made a statement, which surprised me at the time. She said "bring on global warming as it will increase the level of carbon dioxide in the atmosphere to a more beneficial level for our general well being. She also said that the current levels of CO2 are around 2% but back when dinosaurs roamed the planet the level was much greater (around 9%)
Who is right in this debate?
All I know is, because of my doing the Buteyko breathing course I no longer shake the house foundations with snoring.
regards
Simon
ZZZZZZZzzzzzzzzz-------zz-----------z-----
Its interesting that so many people treat global warming as not important, or not happening, and yet are so vocal in their support of recycled drinking water in Qld.
But recycled drinking water is only the solution to the symptom. If we actually took the environment seriously in the first place, or put in place to fix the fundamental problems, we wouldnt be facing the most severe droughts and dramatically changed weather patterns which caused the problem in the first place.
Am I the only one who sees this?
But recycled drinking water is only the solution to the symptom. If we actually took the environment seriously in the first place, or put in place to fix the fundamental problems, we wouldnt be facing the most severe droughts and dramatically changed weather patterns which caused the problem in the first place.
Am I the only one who sees this?
natmarie73 said:
Hi natmarie73,
I probably saw the same documentary.
Best recent example of global dimming was in the days following 9/11.
All airplanes were grounded and hence the usual associated condensation trails disappeared. Temperatures rose appreciably over those few days.
Some of the gunk in the atmosphere is actually keeping the planet cooler, while some gases (CH4, C02, etc) obviously have the reverse effect.
See http://en.wikipedia.org/wiki/Global_dimming
cheers, Tony
Yep thats the one I saw. The bit I remember most was that global dimming was causing evaporation rates to be lower, which must have an effect on rainfall I guess. What is worse, hot and wet or cool and dry?
Hi Natmarie,
I have a layman's understanding, tempered with 20 years of reading scientific journals and books.
Global dimming had its greatest local effects before measurement occurred - during the early industrial age when coal smog became a major issue in countries such as England.
It's been tapering off because humans have been very diligent about removing the visual evidence without removing the major issue... essentially we've done a good job of moving away from the visible pollution caused by urning processes and aerosols.
Note that global dimming didn't peak until a few years after a lot of these pollutants were under control - nature doesn't respond instantly to change
While global dimming supposedly offset global warming, there's really not much evidence of this - partly as we simply haven't collected much evidence and have a very short baseline to measure against, but also partly because dimming can also lead to increased heat retention.....
Dimming occurs when large particles in the atmosphere block visible light.
In certain cases, when particles are reflective, the light (and potentially the heat as well) is reflected back into space.
However when the particles are absorptive rather than reflective, the light is still blocked, causing dimming at the earth's surface, but the heat is absorbed into the particles and can build up, resulting in further increases in temperature in the upper atmosphere and unusual weather changes.
The Wikipedia article doesn't go into this area of the theory.
Something else to keep in mind is that we are, in many scientists' opinions, are overdue for the next ice age and global warming may be helping balance this.
Of course the cure could be worse than the disease....
Cheers,
Aceyducey
I have a layman's understanding, tempered with 20 years of reading scientific journals and books.
Global dimming had its greatest local effects before measurement occurred - during the early industrial age when coal smog became a major issue in countries such as England.
It's been tapering off because humans have been very diligent about removing the visual evidence without removing the major issue... essentially we've done a good job of moving away from the visible pollution caused by urning processes and aerosols.
Note that global dimming didn't peak until a few years after a lot of these pollutants were under control - nature doesn't respond instantly to change
While global dimming supposedly offset global warming, there's really not much evidence of this - partly as we simply haven't collected much evidence and have a very short baseline to measure against, but also partly because dimming can also lead to increased heat retention.....
Dimming occurs when large particles in the atmosphere block visible light.
In certain cases, when particles are reflective, the light (and potentially the heat as well) is reflected back into space.
However when the particles are absorptive rather than reflective, the light is still blocked, causing dimming at the earth's surface, but the heat is absorbed into the particles and can build up, resulting in further increases in temperature in the upper atmosphere and unusual weather changes.
The Wikipedia article doesn't go into this area of the theory.
Something else to keep in mind is that we are, in many scientists' opinions, are overdue for the next ice age and global warming may be helping balance this.
Of course the cure could be worse than the disease....
Cheers,
Aceyducey
Hey Accey,
Maybe we are overdue an iceage. In fact, iceage is really the norm, and we are in an unusual warm period according to this article. This warm period coincides with the start of civilization,....
http://www.ifixitfast.com/globalwarming.htm
I cannot verify this info. Very interesting, and I have posted it before on this forum.
See ya's.
Maybe we are overdue an iceage. In fact, iceage is really the norm, and we are in an unusual warm period according to this article. This warm period coincides with the start of civilization,....
http://www.ifixitfast.com/globalwarming.htm
I cannot verify this info. Very interesting, and I have posted it before on this forum.
See ya's.
