30.05.2016

# New Publications

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González, Miriam Ferrer; Ilyina, Tatiana (2016): Impacts of artificial ocean alkalinization on the carbon cycle and climate in Earth system simulations

González, Miriam Ferrer; Ilyina, Tatiana (2016): Impacts of artificial ocean alkalinization on the carbon cycle and climate in Earth system simulations. In Geophys. Res. Lett. DOI 10.1002/2016GL068576.

"Using the state-of-the-art emissions-driven Max-Planck-Institute Earth system model, we explore the impacts of artificial ocean alkalinization (AOA) with a scenario based on the Representative Concentration Pathway (RCP) framework. Addition of 114 Pmol of alkalinity to the surface ocean stabilizes atmospheric CO2 concentration to RCP4.5 levels under RCP8.5 emissions."

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28.05.2016

# Media

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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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05.02.2016

# Media

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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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28.01.2016

# Media

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Costa, K. M.; et al. (2016): No iron fertilization in the equatorial Pacific Ocean during the last ice age

Costa, K. M.; McManus, J. F.; Anderson, R. F.; Ren, H.; Sigman, D. M.; Winckler, G. et al. (2016): No iron fertilization in the equatorial Pacific Ocean during the last ice age. In Nature 529 (7587), pp. 519–522. DOI 10.1038/nature16453.

"Here we present meridional transects of dust (derived from the 232Th proxy), phytoplankton productivity (using opal, 231Pa/230Th and excess Ba), and the degree of nitrate consumption (using foraminifera-bound δ15N) from six cores in the central equatorial Pacific for the Holocene (0–10,000 years ago) and the LGP (17,000–27,000 years ago). We find that, although dust deposition in the central equatorial Pacific was two to three times greater in the LGP than in the Holocene, productivity was the same or lower, and the degree of nitrate consumption was the same. These biogeochemical findings suggest that the relatively greater ice-age dust fluxes were not large enough to provide substantial iron fertilization to the central equatorial Pacific."

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08.12.2015

# New Publications

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Kumar, Kanhaiya; et al. (2015): CO2 Sequestration Through Algal Biomass Production

Kumar, Kanhaiya; Mishra, Sanjiv Kumar; Choi, Gang-Guk; Yang, Ji-Won (2015): CO2 Sequestration Through Algal Biomass Production. In Debabrata Das (Ed.): Algal Biorefinery: An Integrated Approach. Cham: Springer International Publishing, pp. 35–57.

"As an aggressive move, CO2 sequestration through algal biomass produktion is an promissing option. CO2 sequestered algal biomass can be further utilized for the biofuel productions [...]"

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08.06.2015

# Projects

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Climate CoLab: ocean cooling machine powered by Thermal mass oven as explained in Energy supply

"Using large tubes sunk into the ocean 2000', with props set in them to draw the cold water up, and intermix it into the surface layer."

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01.04.2015

# Political Papers

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Sustainable Shipping Initiative (2015): Signals of Change

Sustainable Shipping Initiative (2015): Signals of Change. Looking at the potential impact of emerging signals of change on the future of sustainable shipping.

Report with one page (p. 23) on CE. "If geoengineering starts to gain mainstream acceptance, there may be the opportunity, or even expectation, for shipping industry players to invest in studies and innovative implementation of these solutions."

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27.11.2014

# Projects

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Project finding: Integrated Assessment of Geoengineering Proposals (IAGP)

Findings from IAGP project online available. "Integrating physical, engineering and social sciences to construct a framework for assessing effectiveness and side effects of geoengineering proposals."

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07.11.2014

# Media

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the guardian: Geoengineering could prevent climate effects caused by giant volcanic eruptions

Media response to Fuglestvedt, Jan S.; et al. (2014). "Shooting huge amounts of non-ozone-harming greenhouse gases into the atmosphere could counteract vast volcanic sulphur clouds that cause perpetual winters, new research suggests"

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