Altered growth conditions more than reforestation counteracted forest biomass carbon emissions 1990-2020.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
19 10 2021
19 10 2021
Historique:
received:
15
02
2021
accepted:
27
09
2021
entrez:
20
10
2021
pubmed:
21
10
2021
medline:
1
12
2021
Statut:
epublish
Résumé
Understanding the carbon (C) balance in global forest is key for climate-change mitigation. However, land use and environmental drivers affecting global forest C fluxes remain poorly quantified. Here we show, following a counterfactual modelling approach based on global Forest Resource Assessments, that in 1990-2020 deforestation is the main driver of forest C emissions, partly counteracted by increased forest growth rates under altered conditions: In the hypothetical absence of changes in forest (i) area, (ii) harvest or (iii) burnt area, global forest biomass would reverse from an actual cumulative net C source of c. 0.74 GtC to a net C sink of 26.9, 4.9 and 0.63 GtC, respectively. In contrast, (iv) without growth rate changes, cumulative emissions would be 7.4 GtC, i.e., 10 times higher. Because this sink function may be discontinued in the future due to climate-change, ending deforestation and lowering wood harvest emerge here as key climate-change mitigation strategies.
Identifiants
pubmed: 34667185
doi: 10.1038/s41467-021-26398-2
pii: 10.1038/s41467-021-26398-2
pmc: PMC8526671
doi:
Substances chimiques
Carbon
7440-44-0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
6075Informations de copyright
© 2021. The Author(s).
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