Monat: Juni 2018

González, Miriam Ferrer; et al. (2018): Enhanced Rates of Regional Warming and Ocean Acidification after Termination of Large-scale Ocean Alkalinization

González, Miriam Ferrer; Ilyina, Tatiana; Sonntag, Sebastian; Schmidt, Hauke (2018): Enhanced Rates of Regional Warming and Ocean Acidification after Termination of Large-scale Ocean Alkalinization. In: Geophys. Res. Lett. DOI: 10.1029/2018GL077847.

„Termination effects of large‐scale Artificial Ocean Alkalinization (AOA) have received little attention because AOA was assumed to pose low environmental risk. With the Max‐Planck‐Institute Earth System Model, we use emission‐driven AOA simulations following the Representative Concentration Pathway 8.5 (RCP8.5). We find that after termination of AOA warming trends in regions of the Northern hemisphere become ∼50% higher than those in RCP8.5 with rates similar to those caused by termination of solar geoengineering over the following three decades after cessation (up to 0.15 K/year).“


Project News: Carbon Capture Coalition Expands Again with Announcement of the National Carbon Capture Leadership Council

„Jackson Hole, WY – June 18, 2018 – At a first-ever national leadership conference on carbon capture, the Carbon Capture Coalition announced the formation of a new group of private sector CEOs; labor, NGO and philanthropic leaders; and former state and federal officials committed to carbon capture technology development. The National Carbon Capture Leadership Council becomes the newest national effort to catalyze support for carbon capture and elevate it as a priority on our nation’s political and policy agenda.“


New Security Beat: Engineering the Climate—or Deploying Disaster? Applying Just War Theory to Geoengineering

„As the national security ramifications of climate change grow more pronounced, climate manipulation technologies, known as geoengineering, will become more attractive as a method of staving off climate-related security emergencies.[nbsp] However, geoengineering technologies could disrupt the global ecological status quo, and could pose a potentially coercive (and very serious) threat to peace.“


Call for Papers: Marine-Based Methods of Global CO2 Management (AGU 2018)

Deadline: 01. August 2018

„Forecasts by the IPCC and others indicate that keeping global warming below 2ºC will require increased efforts to reduce GHG emissions as well as pro-active removal of CO2 from the atmosphere and increased CO2 retention by natural sinks. Considering the important role the ocean already plays in moderating atmospheric CO2, this session explores biotic, chemical, electrochemical, geochemical, physical and hybrid methods of expanding marine-based CO2 capture, removal and/or storage as well as avoidance of CO2 emissions. […] „


Popular Mechanics: NASA Is Stepping Into the Twilight Zone

Tiny ocean plankton pull carbon dioxide out of the air during photosynthesis and stash it in the deeper ocean when they die. NASA scientists want to study this „twilight zone“ when the CO2 ends up to better understand how tiny organisms affect climate change. They’re taking two boats rigged with scientific equipment to the Pacific Ocean to study the twilight zone.



Carbon Brief: Guest post: Seven key things to know about ‘negative emissions’

„Despite the ambitious long-term climate goals of the Paris Agreement, there remains a distinct lack of success at ushering in immediate and sustained reductions in global CO2 emissions. This cognitive dissonance has seen the topic of “negative emissions” – also known as “carbon dioxide removal” (CDR) – move into the limelight in climate science and policy discussions.“


Mayes, William Matthew; et al. (2018): Atmospheric CO2 sequestration in iron and steel slag: Consett, Co. Durham, UK.

Mayes, William Matthew; Riley, Alex L.; Gomes, Helena I.; Brabham, Peter; Hamlyn, Joanna; Pullin, Huw; Renforth, Phil (2018): Atmospheric CO2 sequestration in iron and steel slag. Consett, Co. Durham, UK. In: Environmental science [&] technology. DOI: 10.1021/acs.est.8b01883.

„Carbonate formation in waste from the steel industry could constitute a non-trivial proportion of global requirements to remove carbon dioxide from the atmosphere at potentially low cost. To constrain this potential, we examined atmospheric carbon dioxide sequestration in a [gt]20 million tonne legacy slag deposit in northern England, UK. Carbonates formed from the drainage water of the heap had stable carbon and oxygen isotopes between -12 and -25 ‰ and -5 and -18 ‰ for δ13C and δ18O respectively, suggesting atmospheric carbon dioxide sequestration in high pH solutions. From analysis of solution saturation state, we estimate that between 280 and 2,900 tCO2 have precipitated from the drainage waters. However, by combining a thirty-seven-year dataset of the drainage water chemistry with geospatial analysis, we estimate that [lt]1 % of the maximum carbon capture potential of the deposit may have been realised. This implies that uncontrolled deposition of slag is insufficient to maximise carbon sequestration, and there may be considerable quantities of unreacted legacy deposits available for atmospheric carbon sequestration.“


Earth911: Healthy Climate Alliance: Restore the Climate by 2050

„The Healthy Climate Alliance has a bold and achievable plan to return the global climate to the conditions our great-grandparents enjoyed at the dawn of the 20th century. They want to do it by 2050, using a combination of carbon-removal technologies and natural systems to pull carbon dioxide out of the air and store it in construction materials, the bottom of the oceans, and through other economically viable programs.“


Keller, David; et al. (2018): The Effects of Carbon Dioxide Removal on the Carbon Cycle

Keller, David P.; Lenton, Andrew; Littleton, Emma W.; Oschlies, Andreas; Scott, Vivian; Vaughan, Naomi E. (2018): The Effects of Carbon Dioxide Removal on the Carbon Cycle. In: Curr Clim Change Rep 118 (1), S. 105. DOI: 10.1007/s40641-018-0104-3.

„Here, we review the carbon cycle responses to different CDR approaches and highlight the often-overlooked interaction and feedbacks between carbon reservoirs that ultimately determines CDR efficacy. We also identify future research that will be needed if CDR is to play a role in climate change mitigation, these include coordinated studies to better understand (i) the underlying mechanisms of each method, (ii) how they could be explicitly simulated, (iii) how reversible changes in the climate and carbon cycle are, and (iv) how to evaluate and monitor CDR.“