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Loss of Amazon Rainforest Resilience: Investigation of Resilience Loss in AMSR2’s X-Bandby@escholar
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Loss of Amazon Rainforest Resilience: Investigation of Resilience Loss in AMSR2’s X-Band

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The Amazon rainforest (ARF) is threatened by deforestation and climate change, which could trigger a regime shift to a savanna-like state.
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This paper is available on arxiv under CC BY-SA 4.0 DEED license.

Authors:

(1) Lana L. Blaschke, Earth System Modelling, School of Engineering and Design, Technical University of Munich, Munich, Germany, Potsdam Institute for Climate Impact Research, Potsdam, Germany and [email protected];

(2) Da Nian, Potsdam Institute for Climate Impact Research, Potsdam, Germany;

(3) Sebastian Bathiany, Earth System Modelling, School of Engineering and Design, Technical University of Munich, Munich, Germany, and Potsdam Institute for Climate Impact Research, Potsdam, Germany;

(4) Maya Ben-Yami, Earth System Modelling, School of Engineering and Design, Technical University of Munich, Munich, Germany, and Potsdam Institute for Climate Impact Research, Potsdam, Germany;

(5) Taylor Smith, Institute of Geosciences, University of Potsdam, 14476 Potsdam, Germany;

(6) Chris A. Boulton, Global Systems Institute, University of Exeter, EX4 4QE Exeter, UK ;

(7) Niklas Boers, Earth System Modelling, School of Engineering and Design, Technical University of Munich, Munich, Germany, Potsdam Institute for Climate Impact Research, Potsdam, Germany, Global Systems Institute, University of Exeter, EX4 4QE Exeter, UK, and Department of Mathematics, University of Exeter, EX4 4QF Exeter, UK.

INVESTIGATION OF RESILIENCE LOSS IN AMSR2’S X-BAND

Text S7. The influence of forest loss for the years 2021 to 2022

The X-band of AMSR2 results from the observation of a shorter wavelength compared to the two C-bands. This leads to less sensitivity to aboveground biomass, which is why the results are less likely to indicate whether the ARF is loosing resilience or not. For completeness, Figures S7 and S8 show the results for the X-band. While the spatial correlation is more often increasing than not, which is comparable to the results in the C-bands, this is not the case for variance and AC1 (Figure S7). While the percentage of cells in Figure S8a) exhibiting a positive trend in all three indicators is still above what would be expected by random (12.5 %), it is far less than detected for AMSR2’s C-bands.


Figure S7: Change in single indicators of CSD based on AMSR2’s band X. Trends in variance, AC1, and Spatial Correlation for the X-band of AMSR2.


Figure S8: Summary of indicators of CSD based on AMSR2’s band X. This Figure shows a) the number of indicators with a positive trend per cell and b) the spatially averaged evolution of the single indicators over time.