Country-level land carbon sink and its causing components by the middle of the twenty-first century.
Carbon sink
Carbon storage
Earth system models
Net primary productivity
Residence time
Terrestrial ecosystems
Journal
Ecological processes
ISSN: 2192-1709
Titre abrégé: Ecol Process
Pays: Germany
ID NLM: 101626996
Informations de publication
Date de publication:
2021
2021
Historique:
received:
24
02
2021
accepted:
26
07
2021
entrez:
20
9
2021
pubmed:
21
9
2021
medline:
21
9
2021
Statut:
ppublish
Résumé
Countries have long been making efforts by reducing greenhouse-gas emissions to mitigate climate change. In the agreements of the United Nations Framework Convention on Climate Change, involved countries have committed to reduction targets. However, carbon (C) sink and its involving processes by natural ecosystems remain difficult to quantify. Using a transient traceability framework, we estimated country-level land C sink and its causing components by 2050 simulated by 12 Earth System Models involved in the Coupled Model Intercomparison Project Phase 5 (CMIP5) under RCP8.5. The top 20 countries with highest C sink have the potential to sequester 62 Pg C in total, among which, Russia, Canada, USA, China, and Brazil sequester the most. This C sink consists of four components: production-driven change, turnover-driven change, change in instantaneous C storage potential, and interaction between production-driven change and turnover-driven change. The four components account for 49.5%, 28.1%, 14.5%, and 7.9% of the land C sink, respectively. The model-based estimates highlight that land C sink potentially offsets a substantial proportion of greenhouse-gas emissions, especially for countries where net primary production (NPP) likely increases substantially and inherent residence time elongates.
Sections du résumé
BACKGROUND
BACKGROUND
Countries have long been making efforts by reducing greenhouse-gas emissions to mitigate climate change. In the agreements of the United Nations Framework Convention on Climate Change, involved countries have committed to reduction targets. However, carbon (C) sink and its involving processes by natural ecosystems remain difficult to quantify.
METHODS
METHODS
Using a transient traceability framework, we estimated country-level land C sink and its causing components by 2050 simulated by 12 Earth System Models involved in the Coupled Model Intercomparison Project Phase 5 (CMIP5) under RCP8.5.
RESULTS
RESULTS
The top 20 countries with highest C sink have the potential to sequester 62 Pg C in total, among which, Russia, Canada, USA, China, and Brazil sequester the most. This C sink consists of four components: production-driven change, turnover-driven change, change in instantaneous C storage potential, and interaction between production-driven change and turnover-driven change. The four components account for 49.5%, 28.1%, 14.5%, and 7.9% of the land C sink, respectively.
CONCLUSION
CONCLUSIONS
The model-based estimates highlight that land C sink potentially offsets a substantial proportion of greenhouse-gas emissions, especially for countries where net primary production (NPP) likely increases substantially and inherent residence time elongates.
Identifiants
pubmed: 34540522
doi: 10.1186/s13717-021-00328-y
pii: 328
pmc: PMC8438548
doi:
Types de publication
Journal Article
Langues
eng
Pagination
61Informations de copyright
© The Author(s) 2021.
Déclaration de conflit d'intérêts
Competing interestsThe authors declare that they have no competing interests.
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