Published on 14 novembre 2022
Research from the REgional Carbon Cycle Assessment and Processes project (RECCAP-2), led by Philippe Ciais of the Laboratoire des Sciences du Climat et de l'Environnement (LSCE), is informing global climate policy by constraining the carbon budget – the remaining future emissions available before the warming limits laid out in the Paris Agreement are breached.
The RECCAP-2 research team processed data models of greenhouse gases in the atmosphere, together with measurements taken on the ground and from spatial remote sensing, in order to establish a model for carbon dioxide suitable for evaluating national greenhouse gas inventories submitted by countries to the United Nations Framework Convention on Climate Change (UNFCCC).
The team modelled the data to show how the gases can move, or ‘flux’, between land and atmosphere, for example when carbon dioxide is absorbed by vegetation, released by wildfires, or transported by rivers.
This newly developed methodology is paving the way for countries to also improve checks and consistency of national greenhouse gas inventories used by the UN to assess collective action towards net zero.
Importantly, the team have used these methods to estimate emissions at a country scale enabling them to compare with national greenhouse gas inventories. In doing so, they provide the ability for countries to check, using independent observations, that they are responsibly delivering on their carbon reduction commitments under the Paris Climate Agreement.
Currently, country estimates of sector-based activity are used to compile their national greenhouse gas reports, combining activity statistics with emission factors. These estimates are periodically submitted to the UN and are used to assess collective progress as part of the UN Global Stocktake.
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