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Climate Change is Causing Our Oceans to Become Increasingly Acidic, Threatening to Alter Life As We Know It.

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Old Sunday, December 11th, 2011   #1
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Climate Change is Causing Our Oceans to Become Increasingly Acidic, Threatening to Alter Life As We Know It.

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"From a climate change/fisheries/pollution/habitat destruction point of view, our nightmare is here, it's the world we live in."

This bleak statement about the current status of the world's oceans comes from Dr Wallace J Nichols, a Research Associate at the California Academy of Sciences. Al Jazeera asked Dr Nichols, along with several other ocean experts, how they see the effects climate change, pollution and seafood harvesting are having on the oceans.

Their prognosis is not good.

Dr Nancy Knowlton is a marine biologist at the Smithsonian Museum of Natural History in Washington DC. Her research has focused on the impact of climate change on coral reefs around the world, specifically how increasing warming and acidification from carbon dioxide (CO2) emissions have affected oceans.

While she is unable to say if oceans have crossed a tipping point, Dr Knowlton offered this discouraging assessment, "We know it's bad and we know it's getting worse, and if we care about having coral reefs, there's no question we have to do something about CO2 emissions or we won't have coral reefs, as we do now, sometime between 2050-2100."

Since at least one quarter of all species of life in the oceans are associated with coral reefs, losing them could prove catastrophic.

"Coral reefs are like giant apartment complexes for all these species, and there is intimacy," Dr Knowlton explained. "If that starts breaking down, these organisms, which include millions of species around the world, lose their homes. Even if they aren't eating coral, they depend on it."

CO2 is the main greenhouse gas resulting from human activities in terms of its warming potential and longevity in the atmosphere, and scientists continually monitor its concentration.

In March 1958, when high-precision monitoring began, atmospheric CO2 was 315.71 parts per million (ppm). Today, atmospheric CO2 is approaching 390 ppm.

350 ppm is the level many scientists, climate experts, and progressive national governments say is the safe upper limit for CO2 in the atmosphere.

"You see evidence of the impact of climate change on the oceans everywhere now," Dr Nichols said. "The collapsing fisheries, the changes in the Arctic and the hardship communities that live there are having to face, the frequency and intensity of storms, everything we imagined 30 to 40 years ago when the environmental movement was born, we're dealing with those now … the toxins in our bodies, food web, and in the marine mammals, it's all there."

Bleak scenario

The Zoological Society of London reported in July 2009 that "360 is now known to be the level at which coral reefs cease to be viable in the long run."

In September 2009 Nature magazine stated that atmospheric CO2 levels above 350 ppm "threaten the ecological life-support systems" of the planet and "challenge the viability of contemporary human societies."

In their October 2009 issue, the journal Science offered new evidence of what the earth was like 20 million years ago, which was the last time we had carbon levels this high. At that time, sea levels rose over 30 metres and temperatures were as much as 18 degrees C higher than they are today.

According to the Intergovernmental Panel on Climate Change, carbon emissions have already risen "far above even the bleak scenarios."

Oceans absorb 26 per cent (2.3bn metric tonnes) of the carbon human activities released into the atmosphere annually, according to a 2010 study published by Nature Geocience and The Global Carbon Project.

Unfortunately, global carbon emissions, rather than slowing down in order to stem climate change, are continuing to increase.

At a 2008 academic conference Exeter University scientist Kevin Anderson showed slides and graphs "representing the fumes that belch from chimneys, exhausts and jet engines, that should have bent in a rapid curve towards the ground, were heading for the ceiling instead".

He concluded it was "improbable" that we would be able to stop short of 650 ppm, even if rich countries adopted "draconian emissions reductions within a decade".

That number, should it come to pass, would mean that global average temperatures would increase five times as much as previous models predicted.

According to the National Climate Data Centre in the US, 2010 was the warmest year on record. September 2011 was the 8th warmest September on record since 1880. At 15.53°C, August's global temperature is 0.53 C higher than the 20th Century average for that month.

Even if CO2 emissions were completely stopped immediately, ongoing impacts from climate change would take centuries to stop.

The US National Oceanic and Atmospheric Administration released a study in 2009 showing that a new understanding of ocean physics proved that "changes in surface temperature, rainfall, and sea level are largely irreversible for more than a thousand years after carbon dioxide emissions are completely stopped".

Increasing acidification

Many factors concern Knowlton and Nichols, but one in particular, the increasing acidification of the oceans, has been gaining more attention as of late.

Historically, oceans have been chemically constant, but less than 10 years ago oceanographers were shocked when researchers noticed the seas were acidifying - 30 per cent more acidic - as they absorbed more of the carbon dioxide humans have emitted into the atmosphere, a process that Britain's Royal Society has described as "essentially irreversible."

The oceans are already more acidic than they have been at any time in the last 800,000 years. At current rates, by 2050 it will be more corrosive than they have been in the past 20 million years.


Atmospheric CO2 levels above 350 ppm "threaten the ecological life-support systems" of the planet and "challenge the viability of contemporary human societies" [AP]

Acidification occurs when CO2 combines with seawater to form carbonic acid.

Sarah Cooley, a marine geochemist with the Woods Hole Oceanographic Institution, wrote this about acidification:

"As CO2 levels driven by fossil fuel use have increased in the atmosphere since the Industrial Revolution, so has the amount of CO2 absorbed by the world's oceans, leading to changes in the chemical make-up of seawater. Known as ocean acidification, this decrease in pH creates a corrosive environment for some marine organisms such as corals, marine plankton, and shellfish that build carbonate shells or skeletons."

Already ocean pH has slipped from 8.2 to 8.1, and the consensus estimate is that the pH will drop to 7.8 by the end of this century.

Acidification has been the research focus of biological oceanographer Dr Debora Iglesias-Rodriguez with the National Oceanography Centre at Britain's University of Southampton. She has researched how phytoplankton, which are the major contributors to sinking carbon in the oceans, are able to absorb carbon now and into the future when human impact on the atmosphere is changing the chemistry of the oceans and how this will affect the oceans ability to sink carbon in the future.

"The oceans are becoming more acidic now and this will affect marine life and marine animals and plants," Iglesias-Rodriguez told Al Jazeera. "The chalk producing calcifying organisms are introducing chalk into these increasingly acidic conditions, and it is dissolving."

These chalk produced by these organisms traps and stores carbon, so when increasing acidification decreases the amount of calcium carbonate, it decreases the ocean's ability to store carbon.

"Calcification affects fisheries because many fish's diet is based on these organisms, so this has food security impacts as well," added Iglesias-Rodriguez. "The changes we are seeing now are happening faster than they have for 55 million years. The worry is that these organisms may not be able to keep up with these changes."

In this kind of environment, shellfish cannot produce thick enough shells. By 2009, the Pacific oyster industry was reporting 80 per cent mortality for oyster larvae due to the corrosive nature of the water.

"Acidification has the potential to change food security around the world, so I think it's incumbent upon the entire world to recognise this and deal with it," Cooley told Al Jazeera.

Cooley said that less developed countries that are more dependent on seafood will have less to eat as acidification progresses, and they will be forced to migrate somewhere where there is a better food supply.

Further complicating the situation, rising sea levels, also caused by climate change, will affect migration patterns from island nations as well.

In addition to food security issues, increasing acidification will also cause coral reefs to be degraded, which will affect tourism, coastal protection, and heritage values of coastal regions.

Prof Matthias Wolff is a fisheries biologist and marine ecosystem ecologist working for Leibniz Centre for Tropical Marine Ecology, as well as a research professor and professor at university of Bremen, Germany.

"Plankton, organisms that produce much of the carbon in the sea and coral, are dying off," he told Al Jazeera. "So people believe that CO2 level may double from the pre-human times to more than 400-500 ppm by the end of the century, which would be a unique situation in history. This would have a tremendous effect on these organisms that would affect the whole ecosystem."

Cooley points out that while some species will benefit from increasing acidification, others like corals and molluscs will suffer, along with others that are pH sensitive that cannot control their intercellular biology as well.

"We think there will be shifts in ecosystems, and the current array of species present in an ecosystem is going to shift and there will likely be a new dominant species," she said. "Past studies have shown us that any real decrease in species in an ecosystem can be a bad thing. On land, we see that monoculture fields are really susceptible to a virus or bug. So if acidification decreases diversity, it creates a less stable system in the future. We're anticipating, if things go as they are going now, we really could be seeing some profound shifts in what we know and what we currently benefit from."

Myriad problems

In addition to climate change and acidification, there are many other problems that concern scientists as well.


"Probably every sea turtle on the planet interacts with plastic at some point in its life" [GALLO/GETTY]


"Marine pollution, this is a big issue," Dr Iglesias-Rodriguez said, "There is this idea that oceans have unlimited inertia, but the effect of nano-particles of plastic getting into marine animals and the food chain and these are affecting fish fertility rates, and this effects food security, and on coastal populations. Pollution is having a huge impact on the oceans, and is urgent and needs to be dealt with."

Dr Nichols describes the crisis of the oceans as a three-fold problem.

"We're putting too much in, in all forms of pollution, we're taking too much out by fishing, overfishing, and bi-catch, and we're destroying the edge of the ocean - these places where there is the most biodiversity like reefs, mangroves, sea grass, etc."

Nichols said he finds plastic on literally every beach he visits across the globe, and added, "Probably every sea turtle on the planet interacts with plastic at some point in its life."

Nichols believes that, rather than the polar bear, sea turtles should be the "poster species" for climate change.

"The sex of sea turtles is temperature dependent, so as temperature warms more females are produced, cooling produces more males, and obviously you need the right mix to maintain population ratios," he explained. "We're seeing some eggs literally cooking on beaches now because the temperature has moved out of the tolerable range."

Prof Wolff explained another issue complicating the situation.

"The oceans warm up, and this affects spatial distribution of fish," he explained, "Those needing colder waters need to migrate and change the distribution, other fish can extend their distribution greatly when the water warms, so now they can reach polar regions where they weren't before. So there is a great change in distributional patterns of the resources of the fisheries to be expected in the future."

Wolff points to Greenland fisheries as an example of how an area warms up, there are longer periods for fish production, while in other areas like Brazil and Indonesia, productive areas are shrinking and there will be a great decrease in fishing potential.

"This is already happening," said Wolff.

Dr Knowlton is concerned about how increasing ocean temperatures are causing the bleaching of coral reefs.


Increasing ocean temperatures are causing the bleaching of coral reefs [AP

"Bleaching causes a lot of problems for corals, because if it's severe and prolonged the algae starves to death because the amount of nutrition coral needs is not there," she said. "The 1998 El Nino bleached 80 per cent of the corals in the Indian Ocean and 20 per cent of them died."

She is concerned by the fact that high temperature events like the 1998 El Nino are becoming increasingly common, and added, "We've been having bleaching for close to 30 years now."

Like others, Knowlton sees poor water quality from pollution, overfishing and other problems that are causing ocean conditions to become increasingly unfavourable for corals.

She believes if there is not a major shift to correct the pollution problem, the next 10 years are going to be bleak.

"Increasing numbers of dead zones and collapsing fisheries," Knowlton says is what we can expect, "Then ultimately the collapse of these deep ecosystems that are dependent on things like coral reefs."

What to do?

Despite these grave concerns, Knowlton feels there is something that can be done.

"Even though the long term prognosis with business as usual is pretty grim, we know there are smaller areas where reefs are protected and those are very healthy, and we can reduce local stresses and that builds resilience in ecosystems."

Prof Wolff pointed out that, while more than 75 per cent of fish stocks are overfished or already depleted, there are a number around the globe that are regenerating.

"In 2009 we saw that more than 50 per cent of overfished areas are being rebuilt because they responded to the situation of heavy over-exploitation, so I'm a little more optimistic than many other scientists. By reducing fishing, we can allow the stocks to rebuild."

But he believes that in order for this to happen, we need to create more protected areas in the oceans.

According to Wolff, roughly 10 per cent of our lands are protected, but far less than 1 per cent of oceans are protected.

"We need to aim for 10 to 20 per cent of oceans being protected, because that is what is needed to maintain ecosystem functioning and to rebuild the stocks," he said.

Wolff has been working in the Galapagos Islands on conservation, and cites them as an example of what can happen with protected areas, since there has been no fishery there since 1998.

"If you go diving there you see an abundance of large fish and sharks, which I've never seen anywhere else, you see 200 to 300 sharks in one dive," he said. "To me, this is a promising example of the way we need to go. We need more money for this than for subsidies for fisheries, which is ridiculous. Right now, they are getting as much money as we'd need to manage protected areas of 15 per cent of the oceans."

Nichols believes it is no longer about trying to avert disaster, but more along the lines of mitigating the problems that are already upon us.

"I think we're in it right now," he said, "So it's not about, here's how much time we have. The clock in many ways has already run out. We're still growing our use of fossil fuels, we're not even in a mode of trimming them down, same with our use of plastic and the plastic pollution generated from it. There's more conversation about this than ever, but it's not translating into societal change or evolution."

Nichols makes his point by way of example of ocean types.

"If ocean 1.0 is the pristine natural ocean, 2.0 is the ocean we have now under the petroleum product regime of 100 years of use, and 3.0 is the future ocean," he said. "It can either be a dead ocean, or we can come up with some very innovative solutions that right now people aren't even talking about."

He said we can come up with new ways of getting food from the oceans that don't involve long line fishing and bottom trawling, as well as eliminating packaging and taking a zero-waste approach to consumer goods, both of which he says are possible, "if we can muster the political and personal motivation."

"We could have a healthy ocean in 50 years if we make some bold moves, it wouldn't be 1.0 or 2.0, but it would be a cleaner from a more responsible set of actions for how we get energy from the oceans and how we use them as a source of food."

If that is not done, then we most likely will face a future predicted in a 2008 report co-authored by NASA's James Hansen, a leading climate scientist, titled, Target Atmospheric CO2: Where Should Humanity Aim?

"Humanity today, collectively, must face the uncomfortable fact that industrial civilisation itself has become the principal driver of global climate," reads the report, "If we stay our present course, using fossil fuels to feed a growing appetite for energy-intensive lifestyles, we will soon leave the climate of the Holocene, the world of prior human history. The eventual response to doubling pre-industrial atmospheric CO2 likely would be a nearly ice-free planet, preceded by a period of chaotic change with continually changing shorelines."
Source http://www.aljazeera.com/indepth/fea...856937268.html
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Old Monday, December 12th, 2011   #2
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theiamania shows some promise.

It's an utter mess. Dark times upon the earth. I wonder when the earth will give out a gigantic burp and be done with us all.
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Old Saturday, February 4th, 2012   #3
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Laurier shows some promise.

It is interesting on a cosmological point of view as the same thing is happening in our bodies. Modern junk food tend to be very acidic, PH balance inside body tissues is determinant to our health.

The body maintain the PH stable by some mecanisms such as the "calcium buffer" who use the calcium (which is alcaline) in our body to buffer the excess acidity. The result of this is the epidemic of osteoporosis wich is touching the people submitted to a "western" diet.

This is not bone desease, this is acidity. Taking calcium won't remineralize and reverse it as long as the overall lifestyle is acid. Stress also do produce acidity in the body.

Such diseases was virtually unknown in many places where aborigenous people follow a healthy diet style, far from our modern food wich is openly spreading dead.

Please apologize for grammar.
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Old Saturday, February 4th, 2012   #4
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So its not the big internationals like BP with all its oil spewing into the gulf that's harming sea life, its not the contaminated water from Fukushima that's killing all sea life, no, its us little peoples fault with our evil use of electric lights and gas cookers, or driving around in our evil cars creating that most evil of un-natural gases, CARBON DIOXIDE, killer of all green life on the planet.
Yes its us that's destroying the planet, we must all fall on our swords and leave the earth to the little bunny rabbits and the internationalists and big bankers,
we should all live like third world peasants in humble little mud huts and only the ruling elite should be allowed the luxuries of modern living.
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Old Sunday, February 5th, 2012   #5
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Yes, continue to drive around with your fossile fuel car and make the oil giants and international banksters rich.

You see, it is this with which they get rich, and it is this with which they make everyone dependent on their supply.

Would it really hurt you to drive with solar power (modern batteries meanwhile have a range of 300km)? No, it wouldnt. You'd buy a solar panel to feed your car and then the big power plants also dont earn a cent anymore with you.

It's funny that people fail to see that being consequently green (not that "political" green which comes with "features" one doesnt want) would break up the international bankster elite because it undermines their dependence schemes. That unpolluted air is better than polluted should really be obvious, and when you think some steps further, would it really hurt you if supermarkets would not keep tons of fish stored 24/7 (of which about 50% is thrown away because it wasnt sold in time) and with that, would prevent overfishing, would it really hurt you if supermarkets wouldnt store tons of meat (of which about 30% is thrown away because it wasnt sold in time) and with that reduce mass farms? Essentially, you can extent this to more or less all food products, in the EU round about 40% of all produced food is thrown away.

So even if we reduce production (and with that, transport) by 30% overnight, no one would suffer any real reduction of his "life style". But it would break the monopolies that emerge everywhere in food production and through their power hold up the system, in which they abuse humans, animals and the environment alike to direct all profit to them, and further to the banksters and share holders. Those "global players" we all hate so much.

As long as we all use fuel for our cars, the global oil companies will continue their wars, they will continue to exploit the dependent, they will continue to be able to enslave people in their dependence on oil, and the banks will be able to continue their scheme, because it employs the very same mechanisms of dependence. Going really green on many levels, how engines are driven, how electricity is produced, how we consume, etc is the biggest horror scenario for the global players, because it would always end with local, decentralised production, which cannot be monopolised. They'd be effectively blocked out. When they cant keep their monopoly anymore, lots of alternatives, and for the most part better ways to do all this would have a chance, lots of good inventions take dust in the drawers of the global players right now. And much of them would be even cheaper than the monopoly supply, and safer, and more environmental friendly, and less toxic for humans.
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Old Sunday, February 5th, 2012   #6
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I completely agree with you Velvet, of course Iam against unnecessary pollution, the modern industrialization of foods, products we can make in our own back yards being shipped half way around the world in huge ships that cause far more pollution than our little cars.

Iam against the cutting down of the lungs of the earth, the rain forests so they can grow McDonalds hamburgers or palm oil for a couple of years until the ground turns to dust.
Iam against big supermarkets that close down the local shopkeepers so we all have to use our cars anyway to get to them.
Iam against the cheap rubbish that is manufactured today that lasts half as long as it could.

However, I will not be told that whilst all the above is allowed to continue with nothing said against them, it is I, the little man on the street, that is solely responsible for the resultant harm that THEY are causing, by the proven nonsense of carbon dioxide and man made global warming.

All it is is they ruin the earth making endless money, but they convince us its our fault with this global warming propaganda so that they can escape blame and make us feel guilty and controllable.

Are you aware of what happened in the gulf due to BP and how they make the situation even worst by not cleaning up the oil but hiding it with dispersants?

Have you been keeping up with the fuchishima nuclear power disaster where plutonium, 2 million times more deadly than the uranium of Chernobyl, is being endlessly pumped into the sea with the possible result of Biblical fulfillment in the resultant death of sea life.

Yet the original posting makes no mention of these, no, they will blame the catastrophe that they caused, on us, and like idiots, we will believe them.

Carbon Dioxide indeed, its what the bottom of the seas food chain requires in order to flourish and provide food for the rest of sea life.
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Old Sunday, February 5th, 2012   #7
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You see, like with many things it's not that more helps more. More Co2 will not result in more sea life, but in less. It needs a balance.

It's true that the organisms store Co2, but it's a mere by-product of them taking in calcium for their shells.

And with other organisms in the deep sea, like algae who need Co2, it may prove catastrophic if they are not kept in check through a limitation of Co2. Remember the plaques from algae some years ago? The affected areas needed years to recreate, and so persistence of too high levels of Co2 and with that too many algae will depopulate the deep sea just as well, because the blooming algae will consume all oxygene and halt photosynthesis, leaving a Dead Water zone in which no life can exist.

These zones are also caused by pollution through industrial waste water, who pour lots of other toxics into the sea as well. In that the article is indeed faulty, to reduce the causes to Co2 alone.


I sort of agree with you that we small humans are not the main culprits of carbon dioxide emission and industrial pollution, but c'mon, we small humans (billions of them) consume all the stuff that is produced. It's we who scream for our "living standard", it's we who scream for all-time availability of everything, and if "they" would reduce it on their own, we would scream that they want all the luxury for themselves. But in fact, it's indeed our responsibility to opt out of the system, as much as this is possible and undermine their ways. You cannot say that consumers (and you're one too, like me and everyone else) are not responsible. They wont simply wake up and start caring for the environment, they wont wake up and stop their greed, they wont wake up and stop exploiting humans, animals and the environment. If we want them to stop, we must take our responsibility for what we do, how we behave, how we consume and hunt them to the devil.
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