ocean conditions are changing due to Rapid Global Climate Shift

hoytedow · Sep 5, 2012

troy2000 said: ↑

I knew if we kept going long enough we'd agree on something....
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Well, keep going. Don't sail off the end of the earth.

Frosty · Sep 6, 2012

Congratulations hoyt on reaching 2020 points. My point button just dont work very well.

Nearly all my positive pints have come from you yet I dont seem to be able to reciprocate hence I dont use it much.

I think I have a tight button.

hoytedow · Sep 6, 2012

Thanks, Frosty.

ImaginaryNumber · Sep 6, 2012

ImaginaryNumber said: ↑

Information on Australia's new carbon tax.

A Journey Through Climate History (Check out Future Scenarios)

Carbon pricing explained

Explained: Carbon taxes, emissions trading and direct action...
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Australian Govt defends decision to scrap carbon floor price

The Federal Government is defending its decision to remove the floor price from its carbon pricing scheme.

The Coalition says it's an admission by the Government that the scheme was poorly designed, and is further evidence that it should be scrapped.

But the Climate Change Minister says linking Australia's emissions trading scheme to the European Union's is a "breakthrough" that will strengthen efforts to reduce greenhouse gas emissions...
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whitepointer23 · Sep 7, 2012

the carbon tax will only last till the next election. that redhead freak and her friends will be tossed out on the street where they belong.

whitepointer23 · Sep 7, 2012

next thing we need to do is torpedo that super trawler that is here to wipe out our fish stocks like they did in the northern hemisphere.

ImaginaryNumber · Sep 7, 2012

Scientific American: Fishing Vessels Level Seafloor

Trawlers are smoothing the floor of the Mediterranean Sea, much as farmers flattened fields across Europe centuries ago. And it's likely that similar smoothing is occurring wherever bottom trawlers operate across the Seven Seas.

New research published online by Nature on September 5 reveals that bottom trawling—dragging massive nets across the seafloor to catch food such as deep-sea shrimp—is pushing sediment to fill in gaps on a daily basis, resulting in smooth undersea plains...
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photo caption:

FURROWED FLOOR: Bottom trawling--a fishing technique that drags large nets across the seafloor--has leveled the ocean bottom in the Mediterranean, and likely elsewhere, as shown in this picture of La Fonera Canyon from a remotely-operated submarine.
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powerabout · Sep 7, 2012

whitepointer23 said: ↑

the carbon tax will only last till the next election. that redhead freak and her friends will be tossed out on the street where they belong.
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and where they came from

ImaginaryNumber · Sep 7, 2012

BBC video: How melting Arctic ice helped cause poor UK summer

7 September 2012

The summer of 2012 was the second wettest in the UK since records began - and the wettest summer in 100 years - according to the Met Office.

The bad weather could be blamed in part on the path of the jet stream being further south than usual.

Alan Thorpe of the European Weather Centre explained the early stages of research into the link between melting ice in the Arctic and the UK's poor summer.
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The reasons why the UK was so wet may also have something to do with why the USA was so dry.

whitepointer23 · Sep 7, 2012

ImaginaryNumber said: ↑

Scientific American: Fishing Vessels Level Seafloor

photo caption:
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the super trawler that is here has reflagged as an australian vessel so it can fish our waters legally. it processes 250 ton of fish a day and doesn't come in until there is 18,000 ton in the hold.

powerabout · Sep 7, 2012

whose idea was that
or
whose making the money from that?

whitepointer23 · Sep 8, 2012

powerabout said: ↑

whose idea was that
or
whose making the money from that?
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you have to wonder what the government is getting out of it. but i guess everything else in australia is for sale might as well sell all the fish as well. both sides of goverment are pushing to let the chinese buy the biggest station in australia with the largest water allocation in the country. but we can't purchase property in china.

ImaginaryNumber · Sep 8, 2012

UPI.com: Arctic melt could affect weather long-term

"...It is a greater change than we could even imagine 20 years ago, even 10 years ago," the [Norwegian Polar] Institute's international director, Kim Holmen, told the BBC. "And it has taken us by surprise and we must adjust our understanding of the system and we must adjust our science and we must adjust our feelings for the nature around us..."

"For northern Europe it could mean much more precipitation, while southern Europe will become drier so there are large scale shifts across the entire continent."
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Arctic Sea Ice Extent, Sept 8, 2012

ImaginaryNumber · Sep 8, 2012

Meteor Smoke, Global Warming, and Noctilucent Clouds

NASA|August 7, 2012

Anyone who's ever seen a noctilucent cloud or “NLC” would agree: They look alien. The electric-blue ripples and pale tendrils of NLCs reaching across the night sky resemble something from another world.

Researchers say that's not far off. A key ingredient for the mysterious clouds comes from outer space.

"We've detected bits of 'meteor smoke' embedded in noctilucent clouds," reports James Russell of Hampton University, principal investigator of NASA's AIM mission to study the phenomenon. "This discovery supports the theory that meteor dust is the nucleating agent around which NLCs form."

Noctilucent clouds are a mystery dating back to the late 19th century. Northern sky watchers first noticed them in 1885 about two years after the eruption of Krakatoa. Ash from the Indonesian volcano caused such splendid sunsets that evening sky watching became a worldwide pastime. One observer in particular, a German named T.W. Backhouse who is often credited with the discovery of NLCs, noticed something odd. He stayed outside longer than most people, long enough for the twilight to fully darken, and on some nights he saw wispy filaments glowing electric blue against the black sky. Scientists of the day figured they were some manifestation of volcanic dust.

Eventually Krakatoa’s ash settled and the sunsets faded, but strangely the noctilucent clouds didn’t go away. They’re still present today, stronger than ever. Researchers aren’t sure what role Krakatoa’s ash played in those early sightings. One thing is clear, however: The dust behind the clouds we see now is space dust.

Mark Hervig of the company GATS, Inc, led the team that found the extraterrestrial connection.

"Using AIM's Solar Occultation for Ice Experiment (SOFIE), we found that about 3% of each ice crystal in a noctilucent cloud is meteoritic," says Hervig.

The inner solar system is littered with meteoroids of all shapes and sizes--from asteroid-sized chunks of rock to microscopic specks of dust. Every day Earth scoops up tons of the material, mostly the small stuff. When meteoroids hit our atmosphere and burn up, they leave behind a haze of tiny particles suspended 70 km to 100 km above Earth's surface.

It's no coincidence that NLCs form 83 km high, squarely inside the meteor smoke zone.

Specks of meteor smoke act as gathering points where water molecules can assemble themselves into ice crystals. The process is called "nucleation."

Nucleation happens all the time in the lower atmosphere. In ordinary clouds, airborne specks of dust and even living microbes can serve as nucleation sites. Tiny ice crystals, drops of water, and snowflakes grow around these particles, falling to Earth if and when they become heavy enough.

Nucleating agents are especially important in the ethereal realm of NLCs. The clouds form at the edge of space where the air pressure is little more than vacuum. The odds of two water molecules meeting is slim, and of sticking together slimmer still.

Meteor smoke helps beat the odds. According AIM data, ice crystals can grow around meteoritic dust to sizes ranging from 20 to 70 nanometers. For comparison, cirrus clouds in the lower atmosphere where water is abundant contain crystals 10 to 100 times larger.

The small size of the ice crystals explains the clouds' blue color. Small particles tend to scatter short wavelengths of light (blue) more strongly than long wavelengths (red). So when a beam of sunlight hits an NLC, blue is the color that gets scattered down to Earth.

Meteor smoke explains much about NLCs, but a key mystery remains: Why are the clouds brightening and spreading?

In the 19th century, NLCs were confined to high latitudes—places like Canada and Scandinavia. In recent times, however, they have been spotted as far south as Colorado, Utah and Nebraska. The reason, Russell believes, is climate change. One of the greenhouse gases that has become more abundant in Earth's atmosphere since the 19th century is methane. It comes from landfills, natural gas and petroleum systems, agricultural activities, and coal mining.

It turns out that methane boosts NLCs.

Russell explains: "When methane makes its way into the upper atmosphere, it is oxidized by a complex series of reactions to form water vapor. This extra water vapor is then available to grow ice crystals for NLCs."

If this idea is correct, noctilucent clouds are a sort of "canary in a coal mine" for one of the most important greenhouse gases.

And that, says Russell, is a great reason to study them. "Noctilucent clouds might look alien, but they're telling us something very important about our own planet."
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Video explains how "meteor smoke" seeds noctilucent clouds

Photo Caption: Astronauts on board the ISS took this picture of noctilucent clouds near the top of Earth's atmosphere on July 13, 2012.
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Graphic Caption: A graphic prepared by Prof. James Russell of Hampton University shows how methane, a greenhouse gas, boosts the abundance of water at the top of Earth's atmosphere. This water freezes around "meteor smoke" to form icy noctilucent clouds.
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ImaginaryNumber · Sep 9, 2012

BBC: Arctic ice melt 'like adding 20 years of CO2 emissions'

...In 1980, the Arctic ice in summer made up some 2% of the Earth's surface. But since then the ice has roughly halved in area...

"Over that 1% of the Earth's surface you are replacing a bright surface which reflects nearly all of the radiation falling on it with a dark surface which absorbs nearly all. "The difference, the extra radiation that's absorbed is, from our calculations, the equivalent of about 20 years of additional CO2 being added by man,"...

But then another greenhouse gas - methane, currently trapped in the Arctic permafrost - could be released with warming and make matters worse...
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ocean conditions are changing due to Rapid Global Climate Shift

hoytedow Fly on the Wall - Miss ddt yet?

Frosty Previous Member

hoytedow Fly on the Wall - Miss ddt yet?

ImaginaryNumber Imaginary Member

whitepointer23 Previous Member

whitepointer23 Previous Member

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ImaginaryNumber Imaginary Member

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powerabout Senior Member

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whitepointer23 Previous Member

powerabout Senior Member

whitepointer23 Previous Member

ImaginaryNumber Imaginary Member

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ImaginaryNumber Imaginary Member

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methane_strip.jpg

ImaginaryNumber Imaginary Member

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