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Evaluating a technological fix for climate

Author(s): Brewer PG

Published: June, 2007

Publisher: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.0703892104

Tags: Politics

URL: http://www.pnas.org/content/104/24/9915.short

Abstract: In this issue of PNAS, Matthews and Caldeira report convincing model simulations of a controversial topic of widespread public interest: the possible geoengineering of earth's climate system to hold global warming in check. In the classic psychological sequence with which humans often face extraordinary and perhaps inevitable danger (denial, anger, bargaining, and acceptance), we appear now to be at the bargaining stage, where all kinds of solutions are sought and proposed with new vigor and intensity. This is fully understandable; the drumbeat of steadily rising climate warnings from the sequence of Intergovernmental Panel on Climate Change reports, the recognition of this by leading popular and political figures, and the public's own perception of the massive and increasing use of energy worldwide all augur for plans of action. But are such plans realistic? And what does this model tell us?


Direct Experiments on the Ocean Disposal of Fossil Fuel CO2

Author(s): Brewer PG, Friederich G, Peltzer ET, Orr Jr FM

Published: May, 1999

Publisher: Science

DOI: 10.1126/science.284.5416.943

Tags: Marine Carbon Storage

URL: http://www.sciencemag.org/content/284/5416/943.abstract

Abstract: Field experiments were conducted to test ideas for fossil fuel carbon dioxide ocean disposal as a solid hydrate at depths ranging from 349 to 3627 meters and from 8° to 1.6°C. Hydrate formed instantly from the gas phase at 349 meters but then decomposed rapidly in ambient seawater. At 3627 meters, the seawater–carbon dioxide interface rose rapidly because of massive hydrate formation, forcing spillover of the liquid carbon dioxide from the container. A strong barrier between the liquid carbon dioxide and interaction with the sediments was observed. A pool of liquid carbon dioxide on the sea floor would expand in volume more than four times, forming hydrate, which will dissolve.


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