Geological Net Zero and the need for disaggregated accounting for carbon sinks.

Autor: Allen MR; Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Parks Road, Oxford, UK. myles.allen@physics.ox.ac.uk.; Oxford Net Zero, Environmental Change Institute, School of Geog. & the Environment, University of Oxford, S Parks Rd, Oxford, UK. myles.allen@physics.ox.ac.uk., Frame DJ; School of Physical and Chemical Sciences, University of Canterbury, PB 4800, Christchurch, New Zealand., Friedlingstein P; Faculty of Environment, Science and Economy, University of Exeter, Exeter, UK., Gillett NP; Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, BC, Canada., Grassi G; European Commission, Joint Research Centre (JRC), Ispra, Italy., Gregory JM; National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, UK.; The Met Office, Fitzroy Road, Exeter, UK., Hare W; Climate Analytics, Ritterstraße 3, Berlin, Germany., House J; School of Geographical Sciences, University of Bristol, University Road, Clifton, Bristol, UK., Huntingford C; UK Centre for Ecology and Hydrology, Wallingford, UK., Jenkins S; Oxford Net Zero, Environmental Change Institute, School of Geog. & the Environment, University of Oxford, S Parks Rd, Oxford, UK., Jones CD; The Met Office, Fitzroy Road, Exeter, UK., Knutti R; Institute for Atmospheric and Climate Science, ETH Zurich, Zürich, Switzerland., Lowe JA; Priestley Centre for Climate Futures, University of Leeds, Priestley Building, Woodhouse, Leeds, UK., Matthews HD; Department of Geography, Planning & Environment, Concordia University, Montréal, QC, Canada., Meinshausen M; School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Melbourne, Victoria, Australia., Meinshausen N; Seminar for Statistics, Department of Mathematics, ETH Zurich, Zurich, Switzerland., Peters GP; CICERO Center for International Climate Research, Oslo, Norway., Plattner GK; Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland., Raper S; Manchester Metropolitan University, Ormond Building, Lower Ormond Street, Manchester, UK., Rogelj J; Centre for Environmental Policy and Grantham Institute, Imperial College London, Exhibition Road, London, UK., Stott PA; The Met Office, Fitzroy Road, Exeter, UK.; Department of Mathematics, University of Exeter, Exeter, UK., Solomon S; Department of Earth, Atmospheric, and Planetary Sciences, MIT, 77 Massachusetts Ave., Cambridge, MA, USA., Stocker TF; Oeschger Centre for Climate Change Research, University of Bern, Hochschulstrasse 4, Bern, Switzerland., Weaver AJ; School of Earth and Ocean Sciences, University of Victoria, PO Box 1700, Victoria, B.C., Canada., Zickfeld K; Department of Geography, Simon Fraser University, 8888 University Drive, Burnaby, B.C., Canada.
Jazyk: angličtina
Zdroj: Nature [Nature] 2024 Nov 18. Date of Electronic Publication: 2024 Nov 18.
DOI: 10.1038/s41586-024-08326-8
Abstrakt: Achieving net zero global emissions of carbon dioxide (CO 2 ), with declining emissions of other greenhouse gases, is widely expected to halt global warming. CO 2 emissions will continue to drive warming until fully balanced by active anthropogenic CO 2 removals. For practical reasons, however, many greenhouse gas accounting systems allow some "passive" CO 2 uptake, such as enhanced vegetation growth due to CO 2 fertilisation, to be included as removals in the definition of net anthropogenic emissions. By including passive CO 2 uptake, nominal net zero emissions would not halt global warming, undermining the Paris Agreement. Here we discuss measures addressing this problem, to ensure residual fossil fuel use does not cause further global warming: land management categories should be disaggregated in emissions reporting and targets to better separate the role of passive CO 2 uptake; where possible, claimed removals should be additional to passive uptake; and targets should acknowledge the need for Geological Net Zero, meaning one tonne of CO 2 permanently restored to the solid Earth for every tonne still generated from fossil sources. We also argue that scientific understanding of net zero provides a basis for allocating responsibility for the protection of passive carbon sinks during and after the transition to Geological Net Zero.
(© 2024. The Author(s), under exclusive licence to Springer Nature Limited.)
Databáze: MEDLINE
Externí odkaz: