Cited by 52Conservation, Biodiversity, and Resource ManagementForest ecology and managementForest Management and Policy

Boosted carbon emissions from Amazon deforestation

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Loarie, Scott R., Asner, Gregory P., Field, Christopher B.·2009·Geophysical Research Letters

Abstract

Standing biomass is a major, often poorly quantified determinate of carbon losses from land clearing. We analyzed maps from the 2001–2007 PRODES deforestation time series with recent regional pre‐deforestation aboveground biomass estimates to calculate carbon emission trends for the Brazilian Amazon basin. Although the annual rate of deforestation has not changed significantly since the 1990s (ANOVA, p = 0.3), the aboveground biomass lost per unit of forest cleared increased from 2001 to 2007 (183 to 201 Mg C ha−1; slope of regression significant: p < 0.01). Remaining unprotected forests harbor significantly higher aboveground biomass still, averaging 231 Mg C ha−1. This difference is large enough that, even if the annual area deforested remains unchanged, future clearing will increase regional emissions by ∼0.04 Pg C yr−1 – a ∼25% increase over 2001–2007 annual carbon emissions. These results suggest increased climate risk from future deforestation, but highlight opportunities through reductions in deforestation and forest degradation (REDD).

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  • The potential to avoid future emissions may be larger and more cost-effective than the 161 GtC of emissions avoided thus far, given that current cropland expansion often occurs in tropical forests and that the remaining forests are carbon-rich relative to many cleared forests.

    “Even if yield gains over the next four decades are smaller than those of the previous four decades, the potential to avoid future emissions may be larger and more cost-effective than the 161 GtC of emissions avoided thus far, given that current cropland expansion often occurs in tropical forests and that the remaining forests are carbon-rich relative to many cleared forests”

    From Greenhouse gas mitigation by agricultural intensification (2010) · cites this paper as [43]

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Authors
Loarie, S. R., Asner, G. P., & Field, C. B.
Affiliations
Carnegie Institution for Science (US)
Venue
Geophysical Research Letters
Published
2009-07
Volume
36
Issue
14
ISSN
  • 0094-8276 (ISSN-L)
  • 1944-8007
OpenAlex
W2166685919
Cited by
52
References
44
Citations by year
2025: 2 · 2024: 1 · 2023: 2 · 2020: 1 · 2019: 1 · 2017: 6 · 2016: 6 · 2015: 3 · 2014: 2 · 2013: 4 · 2012: 7
FWCI
6.85
Type
journal article
Language
en
Open access
Locations
Geophysical Research Letters (publishedVersion)
Funders
National Aeronautics and Space Administration
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Conservation, Biodiversity, and Resource Management
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Forest ecology and management
  • Physical Sciences › Environmental Science › Global and Planetary Change › Forest Management and Policy
Keywords
Amazon deforestation, CO2 emissions, aboveground biomass, forest carbon loss, PRODES, forest degradation, REDD+, climate risk, Brazilian Amazon

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