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Post by throttleup on May 2, 2011 13:20:20 GMT
Watching NAT Geo this morning, I found that the carbon dioxide was so high in the atmosphere that it caused an ice age, snow ball earth. I thought it caused global warming. Now I am really confused. Carbon dioxide over 5000ppm, are we not in the 300's. Now its saying the sulfur dioxide made the snowball earth warm up. Were are not the cause of so called climate change. Its May and its chilly still, I am moving south, because I love the warmth. Keep that flame-thrower handy to keep warm!  |
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Post by socold on May 2, 2011 18:05:29 GMT
Watching NAT Geo this morning, I found that the carbon dioxide was so high in the atmosphere that it caused an ice age, snow ball earth. I thought it caused global warming. Now I am really confused. Carbon dioxide over 5000ppm, are we not in the 300's. Now its saying the sulfur dioxide made the snowball earth warm up. Were are not the cause of so called climate change. Its May and its chilly still, I am moving south, because I love the warmth. The CO2 couldn't have caused an ice age or snow ball earth. What the program was probably suggesting was that the ice age and snowball earth was broken by rising levels of greenhouse gases. So yes for a brief period of time there would have been elevated greenhouse gases on a largely ice covered planet, but the ice was melting back. |
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Post by thermostat on May 3, 2011 2:06:00 GMT
Thermostat (#1368) Re: Strat Cooling Though the figures cited in the study are probably accurate the situation in the stratosphere is not a straightforward as is implied. This is one of the (very few) issues on which I agree with Magellan. All the cooling in the lower stratosphere has immediately followed the 2 major volcanic eruptions. On each of these occasions there has been a sharp upward spike followed by a precipitous drop in temperature. There was a step down in temperature following El Chichon (1982) and a further step down following Pinatubo (1991). There has been very little cooling since. It's a bit out of date, but the first graph in this link illustrates the point www.scscertified.com/lcs/docs/Tropotemptrends.pdfglc, I agree. Strat cooling is complicated. From what I have seen, it is not figured out. This makes it interesting, for sure. |
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Post by thermostat on May 3, 2011 2:18:10 GMT
Watching NAT Geo this morning, I found that the carbon dioxide was so high in the atmosphere that it caused an ice age, snow ball earth. I thought it caused global warming. Now I am really confused. Carbon dioxide over 5000ppm, are we not in the 300's. Now its saying the sulfur dioxide made the snowball earth warm up. Were are not the cause of so called climate change. Its May and its chilly still, I am moving south, because I love the warmth. bsattu, Yes, you are indeed confused. We all appreciate that putative snowball earth was clearly a long time ago. This forum is discussing El Nino/La Nina; a very contemporary issue. Could you clarify, when did this event that concerns you occur? |
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Post by thermostat on May 3, 2011 3:00:04 GMT
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Post by AstroMet on May 6, 2011 11:49:50 GMT
I would think it would have something to do with the fact that La Nina affects the climate of half the planet. |
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Post by douglavers on May 7, 2011 1:12:35 GMT
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Post by thermostat on May 7, 2011 2:47:20 GMT
I would think it would have something to do with the fact that La Nina affects the climate of half the planet. astromet. Fair enough. But el nino/la nina is a cycle, not a driver. |
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Post by sigurdur on May 7, 2011 2:50:34 GMT
I would think it would have something to do with the fact that La Nina affects the climate of half the planet. astromet. Fair enough. But el nino/la nina is a cycle, not a driver. Thermostat: You think it is a cycle, but that doesn't rule out that it is a driver. As chaotic as climate is.....hard to really tell. |
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Post by thermostat on May 7, 2011 3:14:04 GMT
astromet. Fair enough. But el nino/la nina is a cycle, not a driver. Thermostat: You think it is a cycle, but that doesn't rule out that it is a driver. As chaotic as climate is.....hard to really tell. Sigurdur, I disagree. How can a natural fluctuation be a driver? It comes and it goes. I don't think it is hard to tell at all. |
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Post by thermostat on May 7, 2011 3:17:51 GMT
Thermostat: You think it is a cycle, but that doesn't rule out that it is a driver. As chaotic as climate is.....hard to really tell. Sigurdur, I disagree. How can a natural fluctuation be a driver? It comes and it goes. I don't think it is hard to tell at all. El nino is like the solar cycle. |
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Post by thermostat on May 7, 2011 3:26:52 GMT
astromet. Fair enough. But el nino/la nina is a cycle, not a driver. Thermostat: You think it is a cycle, but that doesn't rule out that it is a driver. As chaotic as climate is.....hard to really tell. Sigurdur, El Nino redistributes heat in the system, it does not add or subtract heat. A driver adds or subtracts heat from the system. (the present solar cycle has not added or subtracted significant heat from the system; this cycle does not drive long term change in climate; ie the solar cycle has not added long term heat to the system.) The current warming during a prolonged solar minimum is due to a positive driver, not a solar cycle. |
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Post by sigurdur on May 7, 2011 12:33:35 GMT
Thermostat:
I was referring to the potential side effects of the Enso cycle. There is duspute about how the Enso affects clouds. Lets say the effects of Enso affects the sensativity.
Clouds etc.......what happens.
I agree 100% that Enso is not a primary driver, but could be a butterfly in the Amazon that affects air currents type of thing.
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Post by scpg02 on May 7, 2011 16:38:00 GMT
Thermostat: I was referring to the potential side effects of the Enso cycle. There is duspute about how the Enso affects clouds. Lets say the effects of Enso affects the sensativity. Clouds etc.......what happens. I agree 100% that Enso is not a primary driver, but could be a butterfly in the Amazon that affects air currents type of thing. The sun has to be the primary driver in our climate since it is the source of energy but I tend to think of it as the conductor in a symphony. The rest are the instruments, none really more important than another, all working together to create the music. Like a symphony, some instruments will be stronger, stand out more and play a bigger role. |
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fred
New Member
Posts: 48
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Post by fred on May 7, 2011 17:14:49 GMT
If you look at some of the graphs in the data sets there seems to be some oddities. In the 90's (the only ones I've looked at) the yearly finishing and starting are not consistent. i.e. Dec 98 which finishes about +10 then starts in jan 99 at -18.
Any logical reason for this.
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