Friedlingstein, Pierre; O'Sullivan, Michael; Jones, Matthew W.; Andrew, Robbie M.; Hauck, Judith; Olsen, Are et al. (2020): Global Carbon Budget 2020. In Earth Syst. Sci. Data 12 (4), pp. 3269–3340. DOI: 10.5194/essd-12-3269-2020.

"Accurate assessment of anthropogenic carbon dioxide (CO₂) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere in a changing climate – the “global carbon budget” – is important to better understand the global carbon cycle, support the development of climate policies, and project future climate change. Here we describe and synthesize data sets and methodology to quantify the five major components of the global carbon budget and their uncertainties."

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Watson, Andrew J.; Schuster, Ute; Shutler, Jamie D.; Holding, Thomas; Ashton, Ian G. C.; Landschützer, Peter et al. (2020): Revised estimates of ocean-atmosphere CO2 flux are consistent with ocean carbon inventory. In Nat Comms 11 (1), p. 4422. DOI: 10.1038/s41467-020-18203-3.

"We estimate uncertainties using multiple interpolation methods, finding convergent results for fluxes globally after 2000, or over the Northern Hemisphere throughout the period. Our corrections reconcile surface uptake with independent estimates of the increase in ocean CO₂ inventory, and suggest most ocean models underestimate uptake."

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Lee, Hanna; Muri, Helene; Ekici, Altug; Tjiputra, Jerry; Schwinger, Jörg (2020): The response of terrestrial ecosystem carbon cycling under different aerosol-based radiation management geoengineering. In Earth Syst. Dynam. DOI: 10.5194/esd-2020-57.

"We find that changes in vegetation carbon storage under geoengineering application was much smaller than what is exhibited under RCP4.5 scenario that uses climate mitigation efforts by afforestation in the tropics. Hence, it would be important to consider the multiple combined effects and responses of land biomes when applying different strategies to reach the global temperature targets of the Paris Agreement."

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"Scientists making climate-change projections have to deal with a number of uncertainties."

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