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Noctilucent Clouds Spread and Mystify
Wired has a feature on noctilucent clouds, once seen only at high latitudes but increasingly visible now lower down the globe. The clouds result from ice crystals at altitudes of 50 miles, higher than five 9s of the atmosphere. What water ice is doing up there, in a region 100 million times drier than the Sahara desert, is only one of the mysteries associated with the clouds. They are a recent phenomenon: the first scientific description of noctilucent clouds was penned in 1885. For a time it was believed that the clouds were an effect resulting from the eruption of the Krakatoa volcano two years before. Since 2002, the clouds have been sighted — and photographed — as far south as Oregon, Colorado, and Utah. Some scientists believe that human-caused climate change is playing a role, but others doubt this. Two satellites are in orbit to study the clouds; NASA's AIM generated this day-by-day movie of clouds in the vicinity of the North Pole during 2008.
Before the chemtrail conspiracists show up. Somebody break out the Orgone generators!
Kinda disappointing that the first thing nowadays when people see something new it's that "Wow, humans really stuffed up the planet" instead of "Wow, that's an interesting natural phenomenon"
Your hair look like poop, Bob! - Wanker.
Otherwise, it's a closed system and there's no net change in temperature.
You know, except for that whole sun thing.
Sewage Treatment Facilities - "Our duty is clear."
This displeases me mightily:
I've read lots of spiffy evidence to support climate change but it really itches my gizzard when 'scientists' attribute every tiny aberration in the weather to it.
However, it might just turn out that these clouds are caused by cow farts and thrown away McDonalds wrappers so I should probably just wait for these opposing scientists to finish pansy-slapping each other before I start verbally abusing them from my arm-chair.
Of course! There's only little fluffy clouds out there.
Aren't they caused by the space shuttle? I could swear there was an article a couple weeks ago on slashdot about it. Basically they found that they tend to form hours after the shuttle launch, particularly around Antarctica. The shuttle's boosters release X tons of water into the high atmosphere, at altitudes water can't regularly attain, which gets caught by high moving winds that drive it south, where they crystallize.
Interestingly enough we just had a shuttle launch just a couple days ago.
The striped nature of the cloud features is probably because the data was gathered by the DMSP Weather Satellites using their low light detection sensors. These do not take a full-earth view of the world as the sun-synchronous GOES satellites do. DMSP vehicles operate in a lower orbit but a high angle and circular orbit. This brings them near the poles, and they cross the equator at roughly 9AM or 3PM locally to take advantage of the sun angle and shadows on clouds. They scan a wide path beneath them in visible and infrared channels, and have been used for years to do night light intensity mapping, such as for light pollution surveys.
The stripes are the paths from the several vehicles in orbit assembled over time when they passed near the poles.
Your tax dollars at work!
Pacifist paratroopers yell, "Ghandi!" when they jump.
If the hot water vapor left the planet, then the planet would be cooler and we'd have a water shortage to deal with. Otherwise, it's a closed system and there's no net change in temperature.
Water vapor sheds itself of heat through infrared radiation like everything else. It's radiated in all directions and the rays/photons/however you want to model them have a chance to strike something else and be absorbed on their way out of the atmosphere. Hot air rises and takes with it water vapor, which when it radiates its IR at high altitudes is less likely to heat other air.
Convection... it's not just for cooking on the cheap
"You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
Well, not all mankind anyway. We know because of an incontrovertible nice looking graph that pirates keep global temperatures down. As pirates have declined, temperatures have gone up.
Meanwhile, most people don't have ships, so they do the best they can pirating music. Without the ships, parrots, and peg legs, they can't be as effective as sea pirates, so they have to pirate a lot of music (latest RIAA figure: 240% of all music is pirated). The number one hindrance to their diligent efforts to cool the planet before it's too late is the RIAA. So, the RIAA is responsible for global warming, QED.
One of the theories behind the correlation between the sunspot cycle and climate change is that the solar wind tends to deflect cosmic rays from the inner system, and that when sunspots are rare, the solar wind isn't as strong, which allows more cosmic rays to strike the upper atmosphere, generating clouds which deflect sunlight from the Earth. Since up until very recently there's been a sunspot drought, this might indicate a cause.
Or maybe, since temps have flatlined since '99
Temperatures have not flatlined since '99. That's simply a selective interpretation of the trend. The average temperature anomaly for '95-'99 was 0.468 degrees. For '00-'04 it was 0.572 degrees. For '05-'08 it was 0.665 degrees. How is that flatlined?
It's pretty clear on this graph.
You just don't understand how dangerous anthropogenic global warming (AGW) or anthropogenic climate change (ACC) are, do you?
AGW will re-write your hard drive. Not only that, it will scramble any disks that are even close to your computer. If you are at work, it will download porn to your hard drive and the hard drives of all your co-workers.
It will recalibrate your refrigerator's coolness setting so all your ice cream goes melty. It will demagnetize the strips on all your credit cards, screw up the tracking on your television and use subspace field harmonics to scratch any CDs you try to play.
It will give your ex-girlfriend your new phone number. It will mix Kool-aid into your fishtank. It will drink all your beer and leave dirty socks on the coffee table when company comes over. It will put a dead kitten in the back pocket of your good suit pants and hide your car keys when you are late for work.
AGW will make you fall in love with a penguin. It will give you nightmares about circus midgets. It will pour sugar in your gas tank and shave off both your eyebrows while dating your girlfriend behind your back and billing the dinner and hotel room to your Discover card.
It will seduce your grandmother. It does not matter if she is dead, such is the power of AGW, it reaches out beyond the grave to sully those things we hold most dear.
It moves your car randomly around parking lots so you can't find it. It will kick your dog. It will leave libidinous messages on your boss's voice mail in your voice. It is insidious and subtle. It is dangerous and terrifying to behold. It is also a rather interesting shade of mauve.
AGW will give you Dutch Elm disease. It will leave the toilet seat up. It will make a batch of Methamphetamines in your bathtub and then leave bacon cooking on the stove while it goes out to chase gradeschoolers with your new snowblower.
God invented whiskey so the Irish would not rule the world.
..., such as glaciers melting (and yes, they truly are, worldwide, where I live here in Switzerland, but also in Alaska for example). I understand that there should be healthy scepticism at any scientific claim, but the climate is almost certainly changing, enough so that I can personally see it.
The climate is definitly changing.
As it always has been. Sometimes slower, sometimes faster. But in no way that should be an excuse to keep on polluting the planet.
bickerdyke