Deadline: 01. August 2018

"Carbon is an integral building block of life on Earth and has fueled unprecedented economic and societal progress. But with progress has come significant increases in atmospheric carbon dioxide and methane, causing warming and other health and environmental impacts. While efforts to reduce reliance on carbon-based fuels proceed, there is also growing attention to ways to remove carbon from the atmosphere, reliably sequester it, and develop commercial uses for it. Recent National Academies’ reports address scientific and technical issues related to methane emissions monitoring, measurement, and verification; a range of carbon dioxide removal and storage approaches; and utilization of carbon waste streams. This session will expand on these topics, inviting presentations that discuss the challenges and opportunities associated with evolving approaches to manage carbon."

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Keller, David P.; Lenton, Andrew; Scott, Vivian; Vaughan, Naomi E.; Bauer, Nico; Ji, Duoying et al. (2018): The Carbon Dioxide Removal Model Intercomparison Project (CDRMIP). Rationale and experimental protocol for CMIP6. In: Geosci. Model Dev. 11 (3), S. 1133–1160. DOI: 10.5194/gmd-11-1133-2018.

"At present, there is little consensus on the climate impacts and atmospheric CO2 reduction efficacy of the different types of proposed CDR. To address this need, the Carbon Dioxide Removal Model Intercomparison Project (or CDRMIP) 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 CDRMIP experiments, which are formally part of the 6th Coupled Model Intercomparison Project (CMIP6). These experiments 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 and reforestation, as well as ocean alkalinization."

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Hemes, Kyle S.; Chamberlain, Samuel D.; Eichelmann, Elke; Knox, Sara H.; Baldocchi, Dennis D. (2018): A Biogeochemical Compromise. The High Methane Cost of Sequestering Carbon in Restored Wetlands. In: Geophys. Res. Lett. 121 (8), S. 777. DOI: 10.1029/2018GL077747.

"Here we present 14 site years of continuous CH₄ and CO₂ ecosystem‐scale gas exchange over a network of restored freshwater wetlands in California, where long growing seasons, warm weather, and managed water tables result in some of the largest wetland ecosystem CH₄ emissions recorded. These large CH₄ emissions cause the wetlands to be strong greenhouse gas sources while sequestering carbon and building peat soil. The terms of this biogeochemical compromise, dictated by the ratio between carbon sequestration and CH₄ emission, vary considerably across small spatial scales, despite nearly identical wetland climate, hydrology, and plant community compositions."

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Deadline: 31. July 2018

"C2G2 is seeking to hire an Outreach Officer to support C2G2 staff’s engagement with and outreach to representatives of governments and intergovernmental organisations. The position can be located anywhere in the world. The position starts as soon as possible."

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