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originally posted by: Grimpachi
a reply to: SonOfTheLawOfOne
At the 4:22 mark they show how much the glacier retreated in 100 years then show that in the 10 year period where it exceeded what it took 100 years.
They didn't capture that 110 years on film, but saying the show only covers a 4-year term is a bit dissingenious.
Glacier Bay: Map of Alaska and Glacier Bay. Red lines show glacial terminus positions and dates during retreat of the Little Ice Age glacier. Green polygon outlines approximate area mapped by multibeam system in May-June 2001.
"Disingenuous", you say?
originally posted by: Grimpachi
a reply to: SonOfTheLawOfOne
"Disingenuous", you say?
Yes, Absolutely disingenuous on your part. You tried to make it out the video is only about a 4 year period completly ignoring any information on the 110-year frame even in the short video clip.
Now you are going on about 1790 saying why did they start talking about it in the 1800s.
Seriously? Are you trying to say you're not being disingenuous?
If so I completely disagree. Maybe we can just leave it at that because I don't see this going anywhere.
originally posted by: jrod
a reply to: SonOfTheLawOfOne
There are a plethora of threads in this very forum with links to the information you demand. I am replying via mobile phone so linking is difficult
But go ahead and try to play the burden of of proof game without actually offering any proofs against man made climate change, just opinions, half truths, and pseudoscience.
Radiative forcing is something you should be able to figure on your own.
Unlike you I have actually crunched numbers in this field, and it is apparent that you have not.
originally posted by: jrod
a reply to: SonOfTheLawOfOne
Residence time calculations for CO2 is a start.
It gets old being accused of exactly what you are guilty of. Time for you to find another straw man.
originally posted by: SonOfTheLawOfOne
Cold snaps like the ones that hit the eastern United States in the past winters are not a consequence of climate change. Scientists at ETH Zurich and the California Institute of Technology have shown that global warming actually tends to reduce temperature variability.
Repeated cold snaps led to temperatures far below freezing across the eastern United States in the past two winters. Parts of the Niagara Falls froze, and ice floes formed on Lake Michigan. Such low temperatures had become rare in recent years. Pictures of icy, snow-covered cities made their way around the world, raising the question of whether climate change could be responsible for these extreme events.
Climate Change Does Not Cause Extreme Winters, New Study Shows
I expect this to go over like a lead balloon for some of the folks here, but there isn't much to argue, as read below.
Some things worth noting have been emphasized, but the nuts and bolts of this study basically say that we would not be seeing the extreme variations in climate that we've been seeing if temperatures were going up. The temperature fluctuations would stabilize as the temperature goes up and the cold snaps and extreme heat would become less frequent, not more frequent, as some here and elsewhere have claimed.
Temperature range will decrease
Scientists at ETH Zurich and at the California Institute of Technology, led by Tapio Schneider, professor of climate dynamics at ETH Zurich, have come to a different conclusion. They used climate simulations and theoretical arguments to show that in most places, the range of temperature fluctuations will decrease as the climate warms. So not only will cold snaps become rarer simply because the climate is warming. Additionally, their frequency will be reduced because fluctuations about the warming mean temperature also become smaller, the scientists wrote in the latest issue of the Journal of Climate.
The study's point of departure was that higher latitudes are indeed warming faster than lower ones, which means that the temperature difference between the equator and the poles is decreasing. Imagine for a moment that this temperature difference no longer exists. This would mean that air masses would have the same temperature, regardless of whether they flow from the south or north. In theory there would no longer be any temperature variability. Such an extreme scenario will not occur, but it illustrates the scientists' theoretical approach.
Extremes will become rarer
Using a highly simplified climate model, they examined various climate scenarios to verify their theory. It showed that the temperature variability in mid-latitudes indeed decreases as the temperature difference between the poles and the equator diminishes. Climate model simulations by the Intergovernmental Panel on Climate Change (IPCC) showed similar results: as the climate warms, temperature differences in mid-latitudes decrease, and so does temperature variability, especially in winter.
Temperature extremes will therefore become rarer as this variability is reduced. But this does not mean there will be no temperature extremes in the future. "Despite lower temperature variance, there will be more extreme warm periods in the future because the Earth is warming," says Schneider. The researchers limited their work to temperature trends. Other extreme events, such as storms with heavy rain or snowfall, can still become more common as the climate warms, as other studies have shown.
North-south shift makes the difference
And the jet stream? Schneider shrugs off the idea: "The waviness of the jet stream that makes our day-to-day weather does not change much." Changes in the north-south difference in temperatures play a greater role in modifying temperature variability.
Schneider wants to explore the implications these results have in further studies. In particular, he wants to pursue the question of whether heatwaves in Europe may become more common because the frequency of blocking highs may increase. And he wants to find why these high pressure systems become stationary and how they change with the climate.
This doesn't dismiss extra rainfall due to warming due to any warming, or heatwaves that occur.
However, the "theory" that has been kicked around that the cooling and heavy winters are related to extremes of climate changing is on the losing end of the debate. You have an independent study that agrees with the IPCC models, showing that temperature variability (the differences between highs and lows) would in fact, DECREASE, as the temperatures continue to climb. That is not happening. There is more warming happening at the poles, which is a completely separate discussion, and can occur for a lot of other reasons that are outside the scope of this thread.
Flame On!
~Namaste