17.11.2016

# Media

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Slate: Farm the Oceans to Help Stop Global Warming

Including iron fertilization. "It’s a controversial idea—but it’s already happening anyway."

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24.08.2016

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ABC News: Plan B for climate change: Tassie scientists looking at what to do if the worst happens

"Fertilising the oceans, painting the deserts white or sending umbrellas into orbit are some of the real things being explored by scientists as a "plan B" for dealing with climate change."

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28.05.2016

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All About Shipping: Understanding potential impacts of marine geoengineering

"A new GESAMP working group on marine geoengineering held its first meeting at IMO Headquarters, London, this week (23-25 May). The overall objective of the Working Group (WG 41) is to better understand the potential impacts of proposed marine geoengineering techniques on the marine environment – including social and economic consequences."

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23.05.2016

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Tech Times: Iron Fertilization In The Pacific Will Not Solve Climate Change

"Iron fertilization in the Pacific is not an effective solution to climate change, a new research has revealed."

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17.05.2016

# New Publications

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Winckler, Gisela; et al. (2016): Ocean dynamics, not dust, have controlled equatorial Pacific productivity over the past 500,000 years

Winckler, Gisela; Anderson, Robert F.; Jaccard, Samuel L.; Marcantonio, Franco (2016): Ocean dynamics, not dust, have controlled equatorial Pacific productivity over the past 500,000 years. In Proc Natl Acad Sci USA, p. 201600616–201600616. DOI 10.1073/pnas.1600616113.

On effectivity of ocean iron fertilization. "Throughout most of the equatorial Pacific, upwelling of water from the Equatorial Undercurrent supplies far more dissolved iron than is delivered by dust, by as much as two orders of magnitude. Nevertheless, recent studies have inferred that the greater supply of dust during ice ages stimulated greater utilization of nutrients within the region of upwelling on the equator, thereby contributing to the sequestration of carbon in the ocean interior. Here we present proxy records for dust and for biological productivity over the past 500 ky at three sites spanning the breadth of the equatorial Pacific Ocean to test the dust fertilization hypothesis."

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24.04.2016

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iPolitics: Canada still investigating Haida Gwaii ocean fertilizing; new experiment proposed in Chile

"The federal government is still investigating an experiment off the West Coast almost four years ago aimed at boosting salmon stocks that sparked an international outcry. Now a former director and operations officer of Haida Salmon Restoration Corp. says he wants to carry out another ocean-fertilizing exercise, this time off South America."

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20.02.2016

# New Publications

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Hauck, Judith; et al. (2016): Iron fertilisation and century-scale effects of open ocean dissolution of olivine in a simulated CO2 removal experiment

Hauck, Judith; Köhler, Peter; Wolf-Gladrow, Dieter; Völker, Christoph (2016): Iron fertilisation and century-scale effects of open ocean dissolution of olivine in a simulated CO2 removal experiment. In Environ. Res. Lett. 11 (2), p. 24007–24007. DOI 10.1088/1748-9326/11/2/024007.

"Here we use a marine carbon cycle model to investigate the effects of one CDR technique: the open ocean dissolution of the iron-containing mineral olivine. We analyse the maximum CDR potential of an annual dissolution of 3 Pg olivine during the 21st century and focus on the role of the micro-nutrient iron for the biological carbon pump."

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08.02.2016

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Poly Conondrum: Use Of Iron To Boost Algae Not An Answer For Geo-Engineering

"New research suggests that fertilising oceans with iron to increase the growth of algae that absorb carbon dioxide is not the hoped-for answer to reducing global warming. One keenly-argued possible way of moderating the build-up of carbon dioxide in the atmosphere may not work, scientists have concluded."

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05.02.2016

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Flassbeck Economics: Geoengineering offers no solutions to climate change. A study on ocean acidification

"Here is an even bigger result. Last year, Sabine Mathesius and her team from the Potsdam Institute for Climate Impact Research published a landmark study on ocean acidification (see here). The study does not deal with geoengineering. Assuming geoengineering efficiency, Mathesius investigated the effects of CDR on ocean acidification."

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28.01.2016

# Media

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Columbia University: With Climate, Fertilizing Oceans Could Be Zero-Sum Game

Press release on Costa, K. M.; et al. (2016). "Scientists plumbing the depths of the central equatorial Pacific Ocean have found ancient sediments suggesting that one proposed way to mitigate climate warming—fertilizing the oceans with iron to produce more carbon-eating algae—may not necessarily work as envisioned."

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