„We must aim for „negative emissions“. This means removing carbon dioxide from the atmosphere, and ideally returning to pre-industrial atmospheric CO₂ levels. This is a daunting task: the present atmospheric concentration is 410 parts per million (ppm), compared with around 280ppm before the Industrial Revolution. Intriguingly, recent breakthroughs (see below) in biofuel research have brought this prospect a step closer. To understand why, we must first know a little about biofuel production.“
Monat: August 2017
Overview on modelling in the SPP 1689
Keller, David P.; et al. (2017): The Carbon Dioxide Removal Model Intercomparison Project (CDR-MIP). Rationale and experimental design
Keller, David P.; Lenton, Andrew; Scott, Vivian; Vaughan, Naomi E.; Bauer, Nico; Ji, Duoying et al. (2017): The Carbon Dioxide Removal Model Intercomparison Project (CDR-MIP). Rationale and experimental design. In Geosci. Model Dev. Discuss., pp.[nbsp]1–72. DOI: 10.5194/gmd-2017-168.
„At present, there is little consensus on the impacts and efficacy of the different types of proposed CDR. To address this need the Carbon Dioxide Removal Model Intercomparison Project (or CDR-MIP) was initiated. This project brings together models of the Earth system in a common framework to explore the potential, impacts, and challenges of CDR. Here, we describe the first set of CDR-MIP experiments that are designed to address questions concerning CDR-induced climate „reversibility“, the response of the Earth system to direct atmospheric CO2 removal (direct air capture and storage), and the CDR potential and impacts of afforestation/reforestation, as well as ocean alkalinization.„
„Imagine a capsule is launched 70,000 feet into the sky above Arizona and begins to release 100 grams of sulfur, calcium carbonate, or some other substance into the atmosphere. The device then floats back and forth through the ensuing cloud for the next several hours before it disperses, measuring chemical reactions and seeing how much sunlight is being blocked.“
„When I got seriously interested in climate engineering, about 2011, there was little consideration of the diversity of effects it might have on different groups and their interests. Today it has become almost commonplace to acknowledge the importance of hearing voices from a range of countries, thanks in no small measure to the pioneering efforts of the SRMGI. The importance of hearing from publics rather than merely experts is also increasingly embedded in the discourse, although rich deliberation – revealing not only how thoughtful publics can be, but how the different circumstances of deliberation can shape outcomes – has been largely limited to one or two countries in the WEIRD world (White, Educated, Industrial, Rich, Democratic).“
Deadline: 06. September 2017
„This session welcomes abstracts exploring the response of the ocean under scenarios aiming towards a 1.5oC world and how it may feed back to the other components of the Earth system. Relevant issues may include hysteresis effects in ocean circulation or sea-ice, the response of the ocean carbon and other biogeochemical cycles, ecological impacts, and potential unanticipated impacts of geoengineering measures.“
Radio broadcast (min 20:00). „Geo engineering is the deliberate large-scale manipulation of an environmental process that affects the earth’s climate, in an attempt to counteract the effects of global warming. Is this a good idea? Dr. Patricia DeMarco invites Wil Burns to discuss the potential benefits and risks, as well as the moral, ethical and political considerations of this budding technology.“
Swiss-german newspaper article on CE.
„In the absence of a sudden and rapid reduction in global greenhouse gas emissions, recovery options are few and tenuous.[nbsp] In fact, that’s a generous assessment.[nbsp] We have basically reached the point where anything that provides a glimmer of hope is “worth a crack”. One such proposal is to cool the ocean around the reef by “brightening” clouds overhead. [nbsp]Modelling and measurements indicate that increasing cloud cover and density would reduce water temperatures around the reef, although whether the effect is sufficient to arrest coral bleaching is uncertain.“
„It will be another job to limit global warming to 2 degrees Celsius.New scientific research states that large-scale filtering of CO2 from the sky is inevitable.“ (Dutch, auto-translation)