Amazonia as a carbon source linked to deforestation and climate change.

@article{Gatti2021AmazoniaAA,
  title={Amazonia as a carbon source linked to deforestation and climate change.},
  author={Luciana Vanni Gatti and Luana S. Basso and J B Miller and Manuel Gloor and Lucas Gatti Domingues and Henrique Luis Godinho Cassol and Graciela Tejada and Luiz Eduardo Oliveira E. Cruz de Arag{\~a}o and Carlos A. Nobre and Wouter Peters and Luciano Marani and Egidio Arai and Alber H Sanches and S{\'e}rgio Machado Corr{\^e}a and Liana Oighenstein Anderson and Celso von Randow and Caio S. C. Correia and Stephane P. Crispim and Raiane A. L. Neves},
  journal={Nature},
  year={2021},
  volume={595 7867},
  pages={
          388-393
        }
}
Amazonia hosts the Earth's largest tropical forests and has been shown to be an important carbon sink over recent decades1-3. This carbon sink seems to be in decline, however, as a result of factors such as deforestation and climate change1-3. Here we investigate Amazonia's carbon budget and the main drivers responsible for its change into a carbon source. We performed 590 aircraft vertical profiling measurements of lower-tropospheric concentrations of carbon dioxide and carbon monoxide at four… 
Relationship between Biomass Burning Emissions and Deforestation in Amazonia over the Last Two Decades
With deforestation and associated fires ongoing at high rates, and amidst urgent need to preserve Amazonia, improving the understanding of biomass burning emissions drivers is essential. The use of
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TLDR
This Special Feature draws on multidisciplinary contributions from archaeology, history, paleoecology, climate science, and Indigenous traditional knowledge to explore the authors' species’ interaction with tropical forests across space and through time.
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TLDR
This model–data fusion reassessed the carbon uptake of the Amazon rainforest based on the latest canopy structure measurements provided by the GEDI mission in combination with a forest model and found a neutral carbon balance.
Estimated regional CO2 flux and uncertainty based on an ensemble of atmospheric CO2 inversions
Abstract. Global and regional sources and sinks of carbon across the earth’s surface have been studied extensively using atmospheric carbon dioxide (CO2) observations and chemistry-transport model
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A computable general equilibrium model is used to analyze how trade, land use, and agricultural production will change as a result of the trade agreement between the European Union and the Mercosur countries and Brazil, in particular, if ratified by member countries.
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References

SHOWING 1-10 OF 57 REFERENCES
Long-term decline of the Amazon carbon sink
Atmospheric carbon dioxide records indicate that the land surface has acted as a strong global carbon sink over recent decades, with a substantial fraction of this sink probably located in the
Drought sensitivity of Amazonian carbon balance revealed by atmospheric measurements
TLDR
The results suggest that moisture has an important role in determining the Amazonian carbon balance, and the Amazon may become an increasing carbon source as a result of both emissions from fires and the suppression of net biome exchange by drought.
Asynchronous carbon sink saturation in African and Amazonian tropical forests
TLDR
Overall, the uptake of carbon into Earth’s intact tropical forests peaked in the 1990s and independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass reinforce the conclusion that the intact tropical forest carbon sink has already peaked.
Contrasting carbon cycle responses of the tropical continents to the 2015–2016 El Niño
TLDR
The heterogeneous climate forcing and carbon response over the three tropical continents to the 2015–2016 El Niño challenges previous studies that suggested that a single dominant process determines carbon cycle interannual variability.
Drought impact on forest carbon dynamics and fluxes in Amazonia
TLDR
Overall, it is found that during this drought, trees prioritized growth by reducing autotrophic respiration that was unrelated to growth, which suggests that trees decrease investment in tissue maintenance and defence, in line with eco-evolutionary theories that trees are competitively disadvantaged in the absence of growth.
Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model
TLDR
Results from a fully coupled, three-dimensional carbon–climate model are presented, indicating that carbon-cycle feedbacks could significantly accelerate climate change over the twenty-first century.
Estimating the multi-decadal carbon deficit of burned Amazonian forests
Wildfires in humid tropical forests have become more common in recent years, increasing the rates of tree mortality in forests that have not co-evolved with fire. Estimating carbon emissions from
Compositional response of Amazon forests to climate change
TLDR
A slow shift to a more dry‐affiliated Amazonia is underway, with changes in compositional dynamics consistent with climate‐change drivers, but yet to significantly impact whole‐community composition.
The regional variation of aboveground live biomass in old‐growth Amazonian forests
The biomass of tropical forests plays an important role in the global carbon cycle, both as a dynamic reservoir of carbon, and as a source of carbon dioxide to the atmosphere in areas undergoing
Changes in Climate and Land Use Over the Amazon Region: Current and Future Variability and Trends
This paper shows recent progress in our understanding of climate variability and trends in the Amazon region, and how these interact with land use change. The review includes an overview of
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