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Ground data confirm warming and drying are at a critical level for forest survival in western equatorial Africa

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RT @gildauby: Weather ground data for 30 years in Lopé Gabon confirms drying and warming https://t.co/qPyWXf0SFD via @PeerJPreprints
Weather ground data for 30 years in Lopé Gabon confirms drying and warming https://t.co/qPyWXf0SFD via @PeerJPreprints
RT @er_bush: We have a new preprint out - "Warming and drying at critical level for forest survival in western equatorial Africa" https:/…
RT @er_bush: We have a new preprint out - "Warming and drying at critical level for forest survival in western equatorial Africa" https:/…
37 days ago
We have a new preprint out - "Warming and drying at critical level for forest survival in western equatorial Africa" https://t.co/NEndG3ESvx via @PeerJPreprints. Feedback and peer review very welcome as we work on this draft - E
38 days ago
Ground data confirm warming and drying are at a critical level for forest survival in western equatorial Africa https://t.co/5G2IMAh4NH https://t.co/zPYkVp580z
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Supplemental Information

Fourier spectra for weather data from Lopé NP, Gabon

Fourier spectra represent the power of the cycle at each possible frequency. Peaks in the spectra indicate dominant cycles in the data. The dotted vertical lines indicate the position of annual (1/12 = 0.083 cycles per month) and biannual (1/6 = 0.167) cycles. Time series were standardised but observation lengths differ.

DOI: 10.7287/peerj.preprints.27848v1/supp-1

Seasonality of aerosol optical depth at Lopé NP, Gabon (2014-2017)

Lines indicate the monthly means calculated from daily data. The three wavelengths (440nm, 500nm and 675nm) are all relevant for photosynthetically active radiation.

DOI: 10.7287/peerj.preprints.27848v1/supp-2

Matrix of Pearson correlation coefficients for four oceanic indices and rainfall at Lopé NP, Gabon

Red indicates negative correlation and blue indicates negative correlation. The tint indicates the strength of the correlation.

DOI: 10.7287/peerj.preprints.27848v1/supp-3

Matrix of Pearson correlation coefficients for four oceanic indices and minimum temperature at Lopé NP, Gabon

Red indicates negative correlation and blue indicates negative correlation. The tint indicates the strength of the correlation.

DOI: 10.7287/peerj.preprints.27848v1/supp-4

R code for data preparation and statistical analyses

DOI: 10.7287/peerj.preprints.27848v1/supp-5

Lopé weather data selection and preparation

DOI: 10.7287/peerj.preprints.27848v1/supp-6

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Emma R Bush analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Kathryn Jeffery conceived and designed the experiments, performed the experiments, analyzed the data, authored or reviewed drafts of the paper, approved the final draft.

Nils Bunnefeld analyzed the data, authored or reviewed drafts of the paper, approved the final draft.

Caroline Tutin conceived and designed the experiments, performed the experiments, approved the final draft.

Ruth Musgrave conceived and designed the experiments, performed the experiments, approved the final draft.

Ghislain Moussavou performed the experiments, approved the final draft.

Vianet Mihindou conceived and designed the experiments, performed the experiments, approved the final draft.

Yadvinder Malhi conceived and designed the experiments, authored or reviewed drafts of the paper, approved the final draft.

David Lehmann performed the experiments, approved the final draft.

Josué Edzang Ndong performed the experiments, approved the final draft.

Loïc Makaga performed the experiments, approved the final draft.

Katharine A Abernethy conceived and designed the experiments, performed the experiments, analyzed the data, authored or reviewed drafts of the paper, approved the final draft.

Data Deposition

The following information was supplied regarding data availability:

The "Lopé Weather Dataset" is available at The University of Stirling's DataSTORRE (http://hdl.handle.net/11667/133).

Funding

Weather research at SEGC, Lopé National Park, was funded by the International Centre for Medical Research in Franceville (CIRMF; 1986–2010) and by Gabon’s National Parks Agency (ANPN; 2010–present). EB was supported by an Impact Studentship funded by the University of Stirling and ANPN. NB received funding from the European Research Council under the European Union’s H2020/ERC grant agreement no 679651 (ConFooBio). YM received funding from the UK Natural Environment Research Council (NE/ 1014705/1). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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