Climate Hacking Scheme Could Load the Ocean With Neurotoxins
2010 03 20
By Andrew Moseman | DiscoverMagazine.com
Of all the planet hacking possibilities floated as last-minute ways to stave off a climate catastrophe (building a solar shade for the Earth, injecting the atmosphere with sunlight-reflecting aerosols, etc.), iron seeding seems one of the more practical and feasible ideas. The scheme calls for the fertilization of patches of ocean with iron to spur blooms of plankton, which eventually die, sink, and sequester carbon at the seafloor.
Twelve small experiments over the last decade in several ocean locations (red dots) consistently showed that intentionally adding iron results in phytoplankton blooms. (Data courtesy of NASA SeaWiFS Project.)
However, worries over the consequences of tinkering with the ocean ecosystem have held up plans to attempt this. And now, in a study in the Proceedings of the National Academy of Sciences, researchers claim that such a plan could risk putting a neurotoxin into the food chain.
Iron seeders have targeted the large swaths of ocean surface with high levels of nitrate and low chlorophyll, where an injection of iron could potentially turn a dearth of plankton into a bloom. But too many phytoplankton can be a bad thing, especially when it comes to members of the genus Pseudonitzschia. This alga produces domoic acid, which it spews into the surrounding seawater to help it ingest iron [ScienceNOW].
Sea lions off California have gotten sick from the toxin. In Canada, three people died in the 1980s from eating shellfish that themselves had eaten Pseudonitzschia.
Seeding experiments—about a dozen have taken place so far—had not shown the production of domoic acid. But oceanographer Charles Trick was not convinced, because those previous tests had harvested the plankton in the ocean but not tested them until the researchers returned to shore. So, for their study, the researchers examined water samples taken from open-ocean tracts in the sub-Arctic North Pacific Ocean where iron-fertilization experiments were conducted [AFP]. The results were not encouraging.
Pseudonitzschia collected in midocean and subjected to shipboard experiments produced plenty of domoic acid. “We found there is a lot of toxin out there,” he said. “If we were to seed with iron, the amount of toxin would go up” [The New York Times]. In fact, Trick says, the concentration of Pseudonitzschia doubled, which increased how much domoic acid was in the water. In turn, the preponderance of the acid allows more Pseudonitzschia to grow, in a sort of feedback circle.
Trick says he doesn’t think the acid would make it all the way up the food chain to people, though birds might ingest it. But, he says, this is another sign that tinkering on the planetary scale can be fraught with unintended consequences.
The brilliant swirls of green and blue in the midst of the deep, blue Atlantic Ocean off Argentina were created by multitudes of tiny marine plants (phytoplankton) that draw carbon dioxide from the atmosphere to grow. Intentionally adding iron to the ocean would fertilize more phytoplankton blooms. Could this help reduce the buildup of greenhouse gases? (Image courtesy of NASA)
Phytoplankton blooms draw down carbon dioxide from the atmosphere. They are eaten by zookplankton, which produce pellets and aggregates of carbon-containing fecal matter (above), which sink into the depths, where the carbon can be sequestered from the atmosphere. How much carbon would actually be sequestered via ocean iron fertilization is an open question.
Article from: DiscoverMagazine.com
Fertilizing the Ocean with Iron
EPA has Announced that Greenhouse Gases are a Danger to Human Health
75 Reasons to be Skeptical of "Global Warming"
Climategate U-turn as scientist at centre of row admits: There has been no global warming since 1995
The war over ’Snowmageddon’ Global warming, huh?
NASA Global Warming Alarmist Endorses Book That Calls For Mass Genocide
John Coleman’s hourlong news special “Global Warming – The Other Side”
Big freeze could signal global warming ’pause’ (Nice recovery!)
U.K. Citizens Wish Global Warming was True (Video)
The Church of Global Warming
Leading Global Warming Crusader: Cap and Trade May INCREASE CO2 Emissions
Former UN Environmental Advisor, Peter Taylor, gives a brief discussion about solar cycles and climate science. (Video)
Latest News from our Front Page
Sweden Recognizes Palestinian State; Israel Upset
2014 10 31
Sweden on Thursday became the biggest Western European country to recognize a Palestinian state, prompting a strong protest from Israel, which swiftly withdrew its ambassador from Stockholm.
The move by Sweden’s new left-leaning government reflects growing international impatience with Israel’s nearly half-century control of the West Bank, east Jerusalem and its blockade of the Gaza Strip. It also comes during increased ...
Fed-Backed Study: How to Brainwash Public into Fearing “Climate Change” Like Ebola
2014 10 31
$84K study seeks ways to make public fear "climate change and overpopulation"
The National Science Foundation is funding a study to determine how to brainwash the public into fearing “climate change and overpopulation” as if they were Ebola.
The NSF awarded an $84,000 grant to researchers at the State University of New York at Buffalo yesterday to figure out how to make ...
Brain decoder can eavesdrop on your inner voice
2014 10 31
As you read this, your neurons are firing – that brain activity can now be decoded to reveal the silent words in your head
TALKING to yourself used to be a strictly private pastime. That’s no longer the case – researchers have eavesdropped on our internal monologue for the first time. The achievement is a step towards helping people who cannot ...
6 Million Lies
2014 10 30
“If you do not specify and confront real issues, what you say will surely obscure them. If you do not alarm anyone morally, you yourself remain morally asleep. If you do not embody controversy, what you say will be an acceptance of the drift of the coming hell.” C Wright Mills.
I need to share information I have discovered ...
Google’s New Computer With Human-Like Learning Abilities Will Program Itself
2014 10 30
In college, it wasn’t rare to hear a verbal battle regarding artificial intelligence erupt between my friends studying neuroscience and my friends studying computer science.
One rather outrageous fellow would mention the possibility of a computer takeover, and off they went. The neuroscience-savvy would awe at the potential of such hybrid technology as the CS majors argued we have nothing to ...
|More News » |