"Ice-free summers in Arctic Ocean could thwart Paris Agreement objectives".
A new study shows the current trend of melting sea ice in the Arctic Ocean could put at risk the objectives of the Paris Agreement to address climate change.
The study’s authors conclude that, due to the future increase in the sea ice-albedo feedback, global carbon dioxide emission levels would need to reach zero 5 to 15 years earlier than expected to meet targets set by the agreement, substantially increasing mitigation costs. They also show the target of limiting the increase in global temperatures to 1.5 degrees Celsius set by the Paris Agreement would be unachievable without negative carbon emissions.
The rapid loss of sea ice in the Arctic is one of the most striking manifestations of climate change. As sea ice melts, more open water is exposed to solar radiation, absorbing heat and generating a sea-ice–albedo feedback that reinforces Arctic warming. Recent studies stress the significance of this feedback mechanism and suggest that ice-free summer conditions in the Arctic Ocean may occur faster than previously expected, even under low-emissions pathways.
On-farm anaerobic digestion (AD) has been promoted due to its improved environmental performance, which is based on a number of life cycle assessments (LCA). However, the influence of site-specific conditions and practices on AD performance is rarely captured in LCA studies and the effects on C and N cycles are often overlooked. In this paper, a new model for AD (SIMSWASTE-AD) is described in full and tested against a selection of available measured data.
The National Autonomous University of Mexico (UNAM) in collaboration with the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) offers one Postdoctoral position for a candidate who would like to pursue a career in international environmental policy and the multiple values of ecosystems and biodiversity.
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