Ice-Free Summers Coming To Arctic 625
rocketjam writes "CNET reports that researchers from the University of Arizona and other universities have concluded that the Arctic will likely see ice-free summers within a century due to the increasing rate of global warming. The melting will raise ocean levels worldwide, flooding coastal areas where a substantial proportion of the world's population live. The increasing rate of ice melt is already having an impact on people and animals in the Arctic. Currently, researchers cannot foresee any natural forces that will counteract the trend."
Won't someone please think of the snowmen! (Score:4, Interesting)
For something to float, it must displace an equal mass of whatever its floating in. By definition, the north polar ice cap is displacing exactly its own mass in water. If it were to melt, the displaced water would take exactly the same amount of volume as the submerged ice. This would cause the world's ocean levels to rise by the exact amount of zero plus the volume of several dozen annoyed polar bears.
Now, if the Antarctic ice cap were to melt, we'd be in a world of hurt. The southern ice cap does not float in water, it is on top of land which means that the entire volume of any melted ice is added to the seas.
As far as its immediate effect, salinity in the local area would be impacted if we say, microwaved it away from space in the span of a month. And although IANAOS (oceanographic scientist), if it were to slowly melt away over a century, the salinity shouldn't be a factor. And if it becomes a factor for some reason, we have time to dump barges of salt.
Of course, there is always the outside possibility of the lowered salinity disrupting the gulf stream and turning the entire earth into an ideal habitat for the polar bears, who experience a rapid genetic mutation from the additional UV radiation from the depleted ozone layer and hunt mankind to extinction for getting them all wet in the first place.
Greenland, Alaska, Baffin, and plenty others (Score:2)
Pardon me if I avoid the urge to shove my head into the sand.
Re:Won't someone please think of the snowmen! (Score:5, Funny)
The only flaw in your logic is that polar bears don't mind being wet.
Re:Won't someone please think of the snowmen! (Score:2, Insightful)
Got a kick outta your post. However, there is an error in your logic--you're assuming that all of the
Re:Won't someone please think of the snowmen! (Score:5, Informative)
What is it suspended by? If the answer is "more ice", then you're wrong. If the answer is "Greenland", then you're right. But from your wording, it sounded like we're dealing with the "you're wrong" one.
Re:Won't someone please think of the snowmen! (Score:2)
I'm not an expert on biology but there a fair amount of other animals/fish/waterplants that probably evolved to thrive in an artic environment.
I also imagine that amount/area of white ice reflected a fair amount of light/heat from the sun back into space..... especially in the summer when sunlight is shining for months because that part of the planet is more tilted towards the sun.
Perhaps it won't be a mega-impact, as the ocean's surface will also b
Re:Won't someone please think of the snowmen! (Score:3, Interesting)
Re:Won't someone please think of the snowmen! (Score:3, Funny)
But not all of the Arctic ice cap is afloat (Score:5, Interesting)
The total area of Greenland is around 2,175,600 km2 (840,000 sq mi), of which about 84 per cent, or some 1,834,000 km2, is ice cap.
The average thickness of the Greenland ice sheet is over 2000 m.
The area of the oceans is what, 360,000,000 km2?
Melt all of Greenland's ice and is that 10 meters?
Ouch. Er, glug...
See what level you'll be at in 100yrs! (Score:3, Interesting)
Bet you want to know how deep you'll be after all that melting ... above or below sea level?
Americans can get a rough idea of this by looking at http://www.placenames.com/us/ [placenames.com] and selecting your state, county, and city. The approximate altitude is shown at the top of the city's page.
Now, if you happen to live by a hill just over the hundred foot level, maybe you'll get lucky with some beachside proper
you got the facts wrong (Score:5, Informative)
That's neither "by definition" nor in actual fact; significant parts of the ice in the arctic rest on solid ground. When that ice melts, it will raise the sea level. It won't be anywhere near as dramatic as when the southern polar ice cap melts, but it will have an effect.
Re:Won't someone please think of the snowmen! (Score:5, Informative)
However, when taking the different salinity into account, things change. As you know from Archimedes, the ice is displacing exactly enough water to offset its weight (that is, the displaced water weighs as much as the ice). The thing is, it takes less *saltwater* to do that than it would *freshwater*. So when the freshwater in the ice melts, the levels rise.
If you don't believe me, check this article [physorg.com], it includes a picture from an experiment.
Re:And actually, slightly less (Score:5, Informative)
Remember, the ability of an object to float is not (directly) related to its density. Its related to its ability to displace water and its mass. The reason submarines float (or sink) is because their shape displaces a greater mass of water than the equivalent mass of water that would fill their volume.
If you take a piece of steel and put it in a bucket, it sinks and raises the volume of the bucket by the volume of the steel. Take that same piece of steel and form it into a boat hull and it will float -- and the volume of the bucket will increase by exactly the same amount even though all of the steel is not submerged.
Yeah, but (Score:2, Interesting)
Re:Yeah, but (Score:3, Insightful)
Well, those stupid scientists (what have they ever given us?) think that
Re:Yeah, but (Score:5, Insightful)
Current models are all over the place as to what they predict and in almost every case what they predict isn't even close by an order of magnitude to what has happened in that past. Now how are we supposed to rely on models that can't even predict things by a factor of ten? Sheesh, give me a break! Heck, what is even stranger are the journal articles (light reading here) will start with the assumption that global warming is real, find contrary data, and conclude that global warming is real despite the contrary data. This isn't science, it's persuit of funding.
The plain fact of the matter is that to get funding today in various related disciplines to climatology you have to climb on the global warming bandwagon. Sad, but true. It is also interesting that many of the critics of global warming are retired and no longer need funding to persue their interests in the field. In statistics we'd call that strongly correlated.
Now this isn't to say global warming isn't real although I would challenge the notion that it is necessarily related to any man-related activity (that's for another post if anyone is interested). The only constant about the climate on this planet is change and that has been true since it accreted to a planet.
Re:Soooo true (NOT). (Score:3, Interesting)
Your suggestion that environmental catestrophe is our "desired concl
Re:Soooo true (NOT). (Score:3, Insightful)
I do too, which is why I asked the initial question. To me, getting to the truth in the global warming debate means two things: (1) demonstrating that it's real, and (2) determining the cause. Sadly, I feel that these two things have been linked together by most scientists, in part because they can use their theories to get grants. Personally, I'd like to see a lot more published on actual temperature
Re:Yeah, but (Score:5, Interesting)
Yes it does matter. While it is generally true that ice does not change the level of the water it's floating in as it melts, it isn't quite true if the ice contains a different concentration of salt (after it melts) than the water.
Here's a thought experiment:
Fill a water balloon with fresh water and freeze it. Drop it into in a bucket of water from the ocean. The ice inside the balloon floats, just like ice that is not in a balloon, because ocean water is 2.5% denser than fresh water, and fresh water is roughly 10% denser than fresh ice.
Now wait until it melts. Soon the water balloon is full of fresh water again. Has the level of the ocean water in the bucket changed? No. There has been a phase transition inside a floating body, changing its density, but as long as 1. it still floats and 2. its mass hasn't changed, the water level in the bucket doesn't care. The only thing that matters is the mass of the object (i.e. the mass of the displaced salt water), and the fact that the object continues to float.
But if you look at the balloon of meltwater floating in the bucket, you'll notice that it isn't totally underwater. The water line forms a little coin-sized circular "island" at the top of the balloon. This is because the bucket has ocean water in it. If the bucket had fresh water, you wouldn't see a part of the balloon sticking up above the water at all. The balloon might even sink.
Now rip the balloon. This will affect the water level. Why? Because when the balloon breaks, that little crescent of water, that was previously sticking up above the water line as an "island", isn't held together by the balloon anymore and it's free to spread across the surface of the salt water in the bucket, raising its level. Really, the salt water level isn't rising- the shape of the floating object (a blob of fresh water) changes, so that there's a layer of fresh water on top of the salt water. But we say that the water level rises anyway.
Again, if the bucket had fresh water, this wouldn't happen, because the balloon would be totally underwater even if it were floating and there would be no "island".
Remember it's only a tiny little bit of water in the island, and the amount is determined by the density ratio between the fresh water and the ocean water. The density of ocean water is about 2.5% higher than that of fresh, and that determines the extent of the balloon's rise above the water level.
This doesn't take into account secondary effects- we haven't taken into account the effects of mixing. The water might shrink a little bit as the brine and fresh fractions mix. (Similar to how mixing one part alcohol and one part water yields slightly less than two parts of 100 proof, because the water and alcohol molecules fit into each other somewhat.) But physical effects like that are not predictable by a thought experiment, and I'm guessing in the case of fresh vs. salt water that they'd account for much less than a percent of a volume change from what we'd expect. So to an elementary first-order approximation, we'd expect the water level of ocean water to rise when fresh ice melts in it.
How much will it rise? Probably by an amount equivalent to approximately 2.5% of the volume of the total fresh meltwater, divided across the entire surface area of the salty ocean water.
Ice on land is far more threatening to global sea levels. The effective meltwater contribution from landed ice is 100% by weight, not just a few percent as with floating ice.
Re:And actually, slightly less (Score:3, Informative)
Actually, the difference could be quite large. A cube of steel (1 meter x 1 meter x 1 meter) would displace one cubic meter of water as it sank.
Formed into a ship and floating, it would displace enough water to support it's weight. Since steel is about 8x as dense as water, it would displace approximiately 8 cubic meters of water.
(I'm ignoring the density of the air, which is small enough to pretty much
Re:bad science? (Score:3, Insightful)
Contrary to your belief, warm water does not expand. Frozen water, however, does. Ever wonder how giganti
Re:And actually, slightly less (Score:3, Informative)
Sea levels would stay the same.
The surface level in the Arctic would drop to sea level, rather than being slightly above it as it is now.
Re:And actually, slightly less (Score:5, Informative)
I see. And of course you have links to back up this assertion from respected peer-reviewed journals?
I could understand if you had asserted "mankind is not the direct cause of current global climate change." That's something that is quite disputed by various climatologists; so one could be forgiven for ill-advisedly "picking" a side. The problem though, is that your assertion that "all proven scientific evidence shows it's not" (i.e. global warming is not occuring) is absolute bunk.
That global climate change is occuring is a forgone conclusion, the data clearly shows trending towards average global warming and increased atmospheric co2. Current science is focused on change rates; specifically problems involving sampling history, techniques, statistics and force modeling. Without solid data and working representative models, it's very difficult to put forth a sound cause-hypothesis.
[Gaffen, D et al - Multidecadal Changes in the Vertical Temperature Structure of the Tropical Troposphere, Science vol 287, 18 Feb. 2000]
[Hegerl, G.C. and J.M. Wallace - Influence of Patterns of Climate Variability on the Difference between Satellite and Surface Temperature Trends, J. Climate vol 15, 2002]
Re:And actually, slightly less (Score:3, Interesting)
Re:And actually, slightly less (Score:5, Insightful)
"Ice is less dense than water, so we might even see sea levels *decline*"
Un-fucking believable. An entire thread of people who can hold forth about global climate change, when they can't even read a map!
For the geography-impaired in the audience: Greenland, Baffin and Ellesmere islands are really fucking big. And guess what? They're mostly covered with ice. Which might just melt, too.
Re:And actually, slightly less (Score:3, Interesting)
Re:And here we go again... (Score:3, Interesting)
OBTW my grapes grow just fine in Michigan, which has a thriving wine industry as well as New York, both of which have far harsher winters than the British Isles. Those same Viking named the more northern Nova Scotia, Newfoundland area Vinland, or land
Re:And here we go again... (Score:4, Insightful)
But then again there doesnt appear to be any really consensus on what is happening with the world... is it global warming, is it cooling, is it pollution-induced or hell, even pollution stabilised!
Depends on where you are looking for consensus. Oreskes (Science 2004 (vol 306, p1686), studied 928 peer-reviewed papers on climate change published between 1993 and 2003, and found "near universal" consensus. In the specialist community, there really is no dispute, global mean temperatures are rising, and anthropogenic sources of C02 are a likely major contributor to this.
Of course once you enter the world of politics and ideology such consensus is a little more difficult to find. On the other hand if you want to find folks with their heads in the sand, you'll be in luck.
Re:Won't someone please think of the snowmen! (Score:2)
Seems to me that this would be pretty easy to test. Throw some water and ice in a cup, mark the water line, then come back in a couple of hours after the ice is melted. Let me know what you discover.
Further, the ice sheets reflect radiant heat back into space.
Hmm, half the year it's dark. The other 1/2 of the year the sun is at most 23.5% up on the horizon. With such a low angle of incidence of th
Re:Won't someone please think of the snowmen! (Score:3, Informative)
Sadly, it appears they do not. The position of the ice either above or below the water level has absolutely nothing to do with its displacement. If the ice is floating in water, when it melts it will take exactly the same amount of volume as the volume of water it displaces.
A really cool guy named Archimedies figures this out a long time ago. You might want to read up on his work. This [wikipedia.org] is a good start.
Now
Re:Won't someone please think of the snowmen! (Score:5, Informative)
One important phenomenon, as described excellently by another poster in this thread, is the the fact that ice is much fresher than ocean water, so the overall density of the ocean will (most likely) go down, and voile, sea level rises.
The second, as others have also elegantly pointed out, is that much ice is not currently displacing any water, so 100% the effect of its melting is to increase sea level.
There are non-sea level issues of vast importance as well. Even simple climate models show vast sensitivity to overall earth albedo (reflectivity) and they all show a feedback loop with accelerating warming when a substantive amount of polar ice is loss. The fact that we're seeing this melting now is pretty strong clue that warming is going to speed up.
Also of great importance is the contribution of this new fresh water (and thanks to decreased albedo a great deal more heat absorbed by the earth) to the hydrologic cycle, as water vapor is also an important greenhouse gas. If the melted ice becomes water vapor, you can expect - again - increased rates of heating.
And yes, the poles get less heat from the sun than does the equator - the transport of that heat is the ultimate source of all weather patterns. So a substantial change in that heat balance can cause vast disruptions in weather patterns. In addition the potential shutoff of the Gulf Stream and general thermohaline circulation, there are potential movements of large high and low-pressure patterns that can bring intense droughts and flooding to numerous places, in the same way that El Nino does. And since climate systems are strongly nonlinear, it's very hard to predict where and when those events might occur. The effect could be anything from a little more sun in places to life-threating droughts. Put it this way: if something like the North Atlantic Oscillation can set conditions for a devastating hurricane season in the tropical Atlantic (as we're poised to get), imagine what a climate change several orders of magnitude larger could involve.
You can argue all you like about whether these changes are majority anthropogenic or not, but it is indisputable that our carbon-loading of the atmosphere is like pressing hard on the accelerator when you're going down a steep incline. Carbon dioxide content is a big, big, lever for global climate, and I'm hard pressed to see value of taking the Wile E. Coyote approach to dealing with this particular change in our world.
Re:Won't someone please think of the snowmen! (Score:3, Insightful)
Wow. An "self-correcting" climate. Now what, precisely, is a "correct" climate, and how does it know when it needs to self correct back to that spot?
Or are you saying that our current century or so of measurements is the only "correct" climate that's existed out of the last 4.5 billion years? Or in that time period we've never cycled to a point were the earth's temperate is 1.5 degrees C warmer than
Global Warming (Score:3, Insightful)
Seriously though, the hurricane bearing down on New Orleans right now should give folks something to think about with respect to global warming. Specifically, the higher the water levels, the more potential damage that could occur from smaller storms. The big ones, like Katrina will deliver even more damage further inland than ever before. So, the evidence is mounting to the point where even the Bush administration is having to acknowledge that global warming is a reality.
Re:Global Warming (Score:3, Funny)
yes, but they can blame it on asteriods, so we need to build more weapons in space to attack them nasty aliens....
Indeed... (Score:2, Informative)
Yes, indeed, it causes us to think about what it was like before Global Warming, when there were no hurricanes.
Global warming is as much a reality as global cooling, which happens quite frequently in the very short term past hundred years. The earth's climate fluctuates quite rapidly from year to year. CO2 levels fluctuate quite rapidly from year to year. I
Re:Indeed... (Score:3, Insightful)
However, man certainly has an effect on them. The only argument that really matters is determining what that effect is, and whether or not it is likely to be catastrophic in nature.
While it is ignorant to claim that all or even a majority of climate change is as a result of mankind's positive production of greenhouse gases, it is also ignorant to claim that there is no effect.
Certainly, the possibil
Re:Global Warming (Score:5, Informative)
Re:Global Warming (Score:2, Interesting)
As with just about everything, there are three distinct possibilities:
Re:Global Warming (Score:4, Interesting)
That's total bunk. For example, what would happen if by some magical means an enforceable decree came down that said we're eliminating all carbon-based fossil fuels by August 28, 2015?
What would happen is that you'd see one of the largest economic booms in human history. Anything that forces people to get off of their butts and work ends up having a positive effect on the world's economy, whether it's all-out global war in the 1940s or having to kludge the dates on most business software in the 1990s. This would be no different.
Re:Global Warming (Score:3, Insightful)
Simplistic, and fallacious.
more excuses and misinformation (Score:5, Insightful)
There is not an iota of evidence that reducing carbon emissions would lead to a depression. Quite to the contrary: it is quite clear that an aggressive move to energy efficient technologies would create new jobs and growth, and would lower operating costs. Scrapping the energy inefficient technologies of today and building new power plants and factories is probably the best thing that could happen to the US economy.
The only people who stand to lose are the people who have large investments in current, inefficient technologies.
First off, we just don't understand what is happening or why.
I'm sorry you haven't been paying attention, but we do understand what is happening and why it's happening.
Unfortunately, if we are in a position where human-added CO2 is the root cause of all of this, we cannot afford the luxury of these kinds of measures. Sure, they might have some effect and that might help. But if we're the cause of climate change, far, far more drastic measures need to be taken right now.
As comparison with other Western nations alone shows, the US could easily cut its CO2 emissions in half without any decrease in its standard of living; quite to the contrary: a serious program to do that would increase the standard of living and create jobs.
Furthermore, if you think you can't "afford" that level of change, what do you think loss of what is probably going to be 50% of the currently inhabited area of the US is going to do to quality of life? Because that's what's going to happen if the trend continues.
Secondly, the third-world countries would bitterly oppose anything that cuts them off from the developed world or limits their exploitation of fossil fuel energy.
They sure do, because the message we are sending right now is that we want to limit them while continuing our wasteful energy use, since our negotiating position is to use our current, wasteful usage as the basis for future budgets. I suspect developing nations would easily agree to a uniform global per-capita energy and fossil fuel budget.
Re:more excuses and misinformation (Score:5, Insightful)
That'd be most transportation, utility, and manufacturing companies. And the effect of "losing" is that the cost of production of their goods goes up during the changeover to cleaner production methods. That means that everyone is paying more - a lot more - for the same goods they bought last year, without a corresponding increase in wages. Sales decrease, so profits decrease, so people lose jobs.
All that "extra money" goes into producing equipment that doesn't add anything to the growth of the economy, unless the new methods of production also happen to be more efficient cost-wise (which they aren't, and I think that's the failing in your logic - "cleaner" and "more efficient" don't overlap given technology today, while you were assuming they do).
If, as you say, "an aggressive move to energy efficient technologies would create new jobs and growth, and would lower operating costs," then why aren't developing nations jumping at the opportunity to create this new growth? The reason the US didn't sign Kyoto is because developing nations were made exempt from the conditions of the treaty. They were made exempt because they were viewed as being less able to afford such changes. That flies in the face of your statement that changing technologies is a boon to a nation's economy.
They sure do, because the message we are sending right now is that we want to limit them while continuing our wasteful energy use, since our negotiating position is to use our current, wasteful usage as the basis for future budgets. I suspect developing nations would easily agree to a uniform global per-capita energy and fossil fuel budget.
Of course they would, because it uses a faulty metric that's in their benefit. A better measure of what's being done with one's energy consumption isn't per-capita, it's per-dollar-GDP. With that measure, the US is far more efficient than (for example) China and India, whose ability to claim decent per-capita energy consumption is entirely due to the tremendous difference between their urban middle and upper classes and their gigantic rural farming lower class.
Furthermore, if you think you can't "afford" that level of change, what do you think loss of what is probably going to be 50% of the currently inhabited area of the US is going to do to quality of life? Because that's what's going to happen if the trend continues.
The US eastern seaboard isn't just going to roll off into the ocean all in one day, any more than the US is going to switch to nuclear power all in one day. What's more, it's unlikely that, if coastal flooding is going to occur, the US can do anything to stop it. A possible solution is to slowly begin encouraging people to move their homes and businesses inland (we have a lot of space), while building a newer energy infrastructure (nuclear power) as we make that move. The key here is slowly. As long as things are done gradually, the new jobs created by such a program won't be completely swamped by the jobs lost from suddenly shutting off the old infrastructure.
Let Me Educate You (Why Kyoto Sucks and The US OK) (Score:4, Insightful)
See late 1970s stag-flation in the United States.
Wikipedia will help you understand:
http://en.wikipedia.org/wiki/Stagflation [wikipedia.org]
Oil, like food and land, is a critical component of today's economy.
It's less critical than it was (as measured by carbon intensity), but it's still important.
http://www.eia.doe.gov/oiaf/1605/ggrpt/trends.htm
That's not to say that we can't do more to reduce carbon emissions, but with temperatures falling in some places, there is still some wiggle room vis-a-vis global warming and human causation:
http://michiganimc.org/usermedia/image/2/large/Cl
But, given that many in the international community want more action from the United States on this issue, and in general there is distaste everywhere for dumping tons of waste into the atmosphere, there is some room for hope, including the North Eastern United States pact on emissions:
http://www.nytimes.com/2005/08/25/nyregion/25air.
As well as a similar plan for the Pacific costal states of California, Oregon, and Washington also in the works.
http://www.ppionline.org/ppi_ci.cfm?knlgAreaID=11
In general, there is a self righteous feeling amongst non-Americans (especially from pro Kyoto treaty Europeans), but keep in mind please that very few European nations are even meeting their Kyoto targets:
http://www.guardian.co.uk/climatechange/story/0,1
Those nations that are meeting the targets are in deep recessions (including Russia):
http://news.bbc.co.uk/2/hi/europe/3702640.stm [bbc.co.uk]
Kyoto is a 'first step', but many nations supporting that first step aren't actually taking it, making it "a tale, Told by an idiot, full of sound and fury, Signifying nothing." [Macbeth Act 5, Scene 5]
The real key is reducing our economic carbon intensity (generating more money with fewer carbon emissions). We in the United States are already doing that quite well.
Can we move faster? Yes. And we will, if by hook and crook, including regional emissions limitations, higher international oil prices, and a general shift in our economy away from manufacturing and oil consumption.
But arrogant attitudes about 'excuses and misinformation' miss the real point.
Re:more excuses and misinformation (Score:3, Insightful)
A conversion to an economy with a minimal impact on CO2 would not be easy, but it actually would be feasible, and cheaper than the wars in the Middle East. Economic solar power isn't as profitable as oil or coal, but it is profitable. And the Mojave desert, e.g., has enough potential solar power for most of the co
Re:more excuses and misinformation (Score:3, Insightful)
And where do you get the electricity to run all these trolley cars? Unless you've got some magical source of clean power, you're just blowing smoke. Literally, you're blowing smoke from coal power plants into the atmosphere. Oh, you do know that most of the country's power places are run on coal, don't you?
This doesn't even consider the
Re:more excuses and misinformation (Score:3, Interesting)
Really? While you might define returning to horses as the dominant form of transportation to be no change in standard of living, I think most would disagree with you. That is what would be required for a 50% cut. The only countries who find it easy to
No Problem, really. (Score:3, Interesting)
Re:Global Warming (Score:5, Funny)
No, that's "evil-you-shun". It's obvious really. Evil-you-shun is the work of the devil and was actually devised by al-Quaeda to steer God-fearing Southern Baptist Americans away from their faith. Have you looked at pictures of Charles Darwin and Osama bin-Laden? The beard is a dead giveaway. Plus, have you ever seen them in the same place twice? Think about it.
And of course when faced with evil-you-shun, then as a God-fearing American (and let's face it, if you're not God-fearing you have no business being an American), you'd darned well better shun it.
Re:Global Warming (Score:3, Informative)
... I wonder if the sarcasm will sink in, or will i recieve an inappropriate mod like parent? I'm thinking 'informative', how about you guys?
Re:Global Warming -- consequences in the U.S... (Score:3, Funny)
I live in upstate New York, at 210 feet above sea level (God, I love the Catskills!). B
Re:Global Warming (Score:5, Insightful)
Re:Global Warming (Score:4, Interesting)
This is called a feedback effect; specifically, a negative feedback. However, the fact remains that there are many of these feedback effects, and nobody is quite sure whether or not the negative feedbacks will outweight the positives.
An example of a positive feedback? Well, ice is highly reflective. Seawater is not. As the ice melts, the Earth will reflect less sunlight, causing more warming to occur. Another one is that as temperatures rise and sea algae (the largest consumers of CO2 and producers of O2) die off, less CO2 is consumed, producing a greater greenhouse effect
The sad truth is that nobody knows how these feedbacks will even out, and whether or not the positive feedbacks will outstrip the negative ones.
Re:Global Warming (Score:5, Informative)
You link this hurricane to global warming and I'll do a backflip
Start doing backflips sonny. This particular hurricane cannot of course be specifically blamed on global warning. However, one of the most consistent predicitions of modelling over the last decade and a half has been the expectation of an increase in the frequency and strength of extreme weather events. So we can say that this hurrican is not inconsistent with predicted climate change.
Start paying attention over the next decade or two. When you start getting one in a decade hurricanes several times a decade, or you get 4 or 5 hurricanes per season, you should consider yourself put on notice.
Re:Global Warming (Score:3, Informative)
1950 [nationalgeographic.com] appears to still be the worst on record. That article also mentions that hurricanes seasons have a 25-year cycle.
It also seems we have had a bit of calm weather (hurricane-wise) for quite some time:
Re:Global Warming (Score:3, Informative)
But don't let the real facts confuse you.
Re:Global Warming (Score:3, Interesting)
Walk Like A Penguin... (Score:4, Funny)
A century? (Score:2)
Re: (Score:2, Funny)
What the hell? (Score:2)
They have DSL up there?
*scratches head in confusion*
...cool!
*reads parent again*
...no, not cool...
Re:Oh, crap... (Score:2)
Wait for it.... (Score:2, Insightful)
Re:Wait for it.... (Score:3, Insightful)
Re:Wait for it.... (Score:5, Funny)
1. It was colder than average at my house for 2 days last week.
2. The planet is supposed to get warmer and colder, it is natural. Just look at the tropical fossils and dinosaur bones in Canada. The temperature changes are natural.
3. Man has only been on this planet for 10,000 years, it says so in the bible. This means the scientific data uncovered about earths climate is wrong. It was probably planted by the devil.
4. It has been cloudy for 2 weeks, how can it be warming with no sun?
5. Doesn't ice expand when it freezes, so melting would lower the sea level right?
6. I have a paintball gun, powered by C02. That stuff is cold! How could it warm the planet?
7. We can't be sure the planet is getting warmer simply because the measurements say it is. Don't cloud the issue with facts.
8. If there is soo much C02 around, then why are my garden plants dead? The extra C02 should make them grow fast. I only got 4 cuekes this year.
9. How can the planet be getting so much warmer when more and more of the world now has air conditioning?
10. If the planet was getting that much warmer, we would see a consistant rise in the stock price of anti-perspirant companies. Us overweight americans are using less deodorant than ever!
HA! (Score:2, Interesting)
Warm surface currents will be disrupted by increased higher lattitude heating and this will cause lower warm water circulation to the Arctic and during winter when no solar radiation is possible to provide other warming. The pole will be colder than ever.
In other news... MIT launched a course in advanced FUD studies for their bui
Maybe yes, maybe no (Score:2, Informative)
The above link is one of the many sites that have for a long time been casting doubt on global warming. It appears that sunspots may have the strongest effect on the planet's climate.
Didn't we just have a bet between two groups of scientists about the climate being cooler in twenty years. I remember that in the seventies we were worried about global cooling.
HEY THIS PARENT IS INSIGHTFUL! (Score:2)
MOD Parent DOWN, Please (Score:4, Informative)
What is sick is not that you were modded up, but that somebody on fox is reporting exactly what you are saying.
Sunspots. Suppose solar output changes (Score:4, Insightful)
Will you see higher daytime temperature, higher nighttime temperatures, or both but with daytime predominating?
Common sense tells you the same thing that math would tell you. The sun warms us up in the daytime.
Now try a different thought experiment. Imagine that someone's changed your atmosphere so that it insulates better against heat radiating into space. Will you see daytime temperatures go up more, or nighttime temperatures go up more?
That's right -- you'd see more change in nighttime temperatures.
Guess what we're seeing in contemporary measurements?
Greenland is the problem (Score:2, Insightful)
the real problem ... (Score:3, Funny)
How about? (Score:5, Insightful)
I heard, (hearsay evidence, so check it out for yourself.) that their are paintings made in Holland from a few hundred years ago that show people ice skating on a river that doesn't freeze over now. That river was also never depicted as having frozen over before those paintings were made.
There are many variables that effect our environment. While we make an impact, and we should strive to lessen our impact... One scientists study... or a group of scientists work... should be taken with a grain of salt.
Re:How about? (Score:5, Informative)
Bush (Score:3, Funny)
Which do you want to hear first? (Score:2)
The good news: This one isn't on Google. [slashdot.org]
In all seriousness, I hope that this doesn't happen. I'm kind of fond of the climates we've got now.
Rising sea-levels? (Score:3)
rising temps increases water capacity of the air.. (Score:3, Insightful)
So there is a chance that the oceans could stay level or even go down as the global temperature rises.
Old News Up North (Score:4, Interesting)
The most conspicuous signs are the recent claim by the U.S. that the North West Passage constitutes international waters, followed by Canada and Russia both claiming sovereignty over their respective northern lands to the North Pole. The U.S. commercial interests would be well served by having open shipping across the north during the summer months. This summer the Canadian Navy sailed into Hudson Bay to fly the flag.
Personally I think the Canadian north in summer is adequately protected from intrusion by mosquitos and black flies in numbers not even a google plex could account for, and they're really big too.
lol, where's the FUD-fallacy touters? (Score:3, Funny)
Investiment Opportunities (Score:4, Insightful)
So the question is how to strategically pick investments that will pay off with the trend. Sounds greedy and selfish but the tragedy of the commons [dieoff.org] will not be denied. So ideas
Firefox users get Hot Sauce [sammcgees.com] at a discount.
Que the global warming rants (Score:5, Insightful)
And even though there's the possiblity (I won't go into how likely it is) that it's natural, shouldn't we do our best to counteract it's effects as much as possible? Even if it is natural? Because if it isn't, we might have a really big problem on our hands.
Or we can play the blame game, and argue whether it's man's fault or nature's fault, and possibly not pass on a liveable planet to our future children.
exactly (Score:3, Interesting)
we can seed the oceans with iron and suck out carbon dioxide
and we can belch out enough burning whatever and push in carbon dioxide
the point: stop talking about blame, start talking about controlling the thermostat
if hurricane katrina in new orleans right now isn't argument that people should control the environment for the sake of:
1. the economy
2. the population
3. the environment
4. the ecosystem
i don't know what the heck is
the
Re:Que the global warming rants (Score:4, Insightful)
When people say "shouldn't we do something to stop it?", they really mean "shouldn't we give the government vast new expanded powers to regulate society, because only the government authority is efficient and trustworthy enough to solve the problem of pollution". The concept of massive government regulation and central-planning are implicit in what you are saying, because absolutly no-one of any political persuation wants to stop people from voluntarily acting to stop global warming.
If someone doesn't support the Patriot Act, or G. W. Bush's "War on Terror", that doesn't mean they are a terrorist or support terrorism. It means that: A) They don't think the Patriot Act or the G. W. Bush's "War on Terror" is an effective policy in combating terrorism and/or B) They feel the solution to the problem is worse than the problem itself (i.e. bombing cities, government servialence without a warrent, etc., are actually worse than the terrorist acts they are meant to stop).
When G. W. Bush and right-wing totalitarians stir up sensationalism and fear of an "impending terrorist nuclear attack", they are provoking an emotional response in order to get people to agree to expanded government powers they would normaly be skeptical about. And to squeltch any sort of debate about what we should do about a very real terrorist threat... When people say "shouldn't we do out best to stop terrorism as best as possible" , there is a hidden assumption that there is only one succesful way to combat terrorism, and that anyone who doesn't support it supports terrorism.
And the same thing is true about the left-wing totalitarians. It is clear that global warming is going to be a problem, and by sensationalistic fear-mongering about "impending ecological disaster", they can try to get people out of fear and desperation to agree to expanded government regulation and control of the economy. Instead of having a serious debate about what we should do to reverse global warming... central-planning and top-down government control is presented as the "only solution", and anyone who disagrees with those policies is an "eco-terrorist".
If the so-called enviornmentalists really want to do something about global-warming, they are going to have to stop using global-warming and the enviornment as a pretense for promoting their political, economic, and social agenda. No sane person on the planet wants to wait around for the enviornment to be destroyed. But when the only solution presented to us is totalitarianism (or at least what we percieve to be totalitarianism), you are naturally going to have the resistance and skepticism you see from many people on slashdot. We can read the assumptions in your statements, and those make us very worried.
Re:Que the global warming rants (Score:4, Insightful)
Government does, and should, have a role in regulating markets. For instance, the government is responsible for labeling laws, and establishing standards measurements, and (more recently) in mandating industry use best common practices for accounting.
Even the most pro-HMV, anti-abortion, pro-gun, anti-public education Republican would not argue against this. The question is rather what the best role of the government is in the market.
One obvious way to influence the market is to apply the CAFE standards to all cars bought and sold, rather than exclude pickup trucks and SUV's. And in fact, the Bush administration has just last week proposed something like this, although of course in a very slight way designed not to upset major campaign donors at major car-building corporations.
The government can also shift spending away from projects that will encourage greenhouse emission, such as building new highways, to things like providing real alternatives to the car. This does not necessarily mean spending more money, but rather to spend it differently.
A third (and probably most important) way that the government can help is to fund basic (and applied) research to help minimise the demand for CO2-emitting fuel sources. Most likely this will mean research into nuclear power - cleaner, cheaper fission plants in the medium-term, and fusion plants in the long term. Government-funded research is necessary for technologies that have no hope to be profitable in a decade or two. Companies need to make money!
Re:Que the global warming rants (Score:3, Interesting)
Why must we reduce greenhouse gasses? (Score:3, Insightful)
Why must it be solved
Re:Que the global warming rants (Score:4, Insightful)
The planet will always be liveable, but it may not be liveable for us.
In fact, all macroscopic life is something of an evolutionary quirk. This planet (and probably any life supporting planet) truly belongs, and will always belong, to the microscopic. Nothing's meeker than bacteria.
Did you know that the fact that Earth has ice at _both_ polar ice caps is an anomoly in its history?
Did you know that Antarctica apparently supported green forests as recently as three million years ago (after the continent was over the south pole)?
Did you know that we live in a remarkably stable period in Earth's climactic history. From ice core samplings we have readings that show _incredibly_ fast fluctation in temperature and we have no idea _what_ could possibly affect the planetary temperature so quickly?
There's a lot we know, but tons more that we don't and it's arrogant to believe that we affect the planet on anything more than a small scale.
Sure the small scale is huge to us and has great implications for our (and that of other macroscopic life) continued health and survival. But the planet is fine.
I think that we are missing something... (Score:2, Interesting)
Re:I think that we are missing something... (Score:3, Informative)
Or if by that you meant that fluctuations in solar output somehow magically gets smoothed over by the ecosystem, sorry. I'm no expert on thermodynamics, but if you increase the energy you're pumping into a system, there must be some effect. Energy doesn't just go away. The system's processes must somehow take it in, but they're not going to be unaf
Ice-free Arctic (summers at least) (Score:2)
When I saw the title "Ice-free summers coming to the Arctic", the first thing that came to my mind was...
The next century is taking this trend a bit too far, don't you think :-)
Sell your arctic shares now! (Score:3, Insightful)
What they can't say is *why* it is happening, and what if anything we can or should do about it. Who is to say in trying to reduce the effect we won't speed it up or make it worse?
Which isn't to say that we shouldn't study or try to understand it, but headings like this one don't help. What we need is properly funded research and a good sit down and think about it without trying to raise money and further careers through fud .
Orwell's question (Score:4, Interesting)
We might be returning to the way things were, instead of having an Unprecedented Catastrophe.
Don't you mean Intelligent Thermal Control? (Score:3, Funny)
Furthermore, this process is too complex to be naturally occuring, so some intelligent hand must be guiding the temperature changes.
I really think they should be teaching Intelligent Thermal Control as an alternate theory is school science classes.
Prehistoric change in sea level (Score:3, Insightful)
Melting icebergs may not be the major factor, but continental ice sure as hell must be.
is jumping natural? (Score:3, Funny)
Buy that Nunavet beachfront now (Score:3, Funny)
Re:Business Plan (Score:3, Interesting)
Re:What if.... (Score:3, Insightful)
Please stop talking about the subject until you know the answer to that question. (I assume that you don't from your "Has anyone looked at the larger trends" comment, and yes, they have.)
Re:Global Warming (Score:3, Insightful)
I deny the existence of global warming. Not because it's impossible for the entire world to become uniformly warmer, but because there's no reasonable evidence that it's actually happening. It would, of course, be ludicrous to deny the existence of arctic maritime warming, which is what your post was really about. At least, as far as I could tell - you m
Re:Coastal Flooding Will Not Happen. PROVE ME WRON (Score:3, Informative)
Good logic here, but the model is much more complex. It's not so much about water levels as it is about energy.
With that much water being warmed up, there's a lot more activity in the biosphere, which changes many, many things. During the 1400's, altered weather patterns in combination with high tides created storms which ravaged population centers all along England's and Europe's coasts. And this was during a period of mini-ice age cooling, not heati