The doi above is for this specific version of this dataset, which is currently the latest. Newer versions may be published in the future. For a link that will always point to the latest version, please use
doi: 10.4121/16884913

Jaïbi, Olfa (2021): Data of two sites in Somalia underlying the paper: Multistability of model and real dryland ecosystems through spatial self-organization. Version 1. 4TU.ResearchData. dataset. https://doi.org/10.4121/16884913.v1

Dataset

• Ecology
• Applied Mathematics
• Physical Geography and Environmental Geoscience
• Other Mathematical Sciences
• Numerical and Computational Mathematics

arid ecosystems, data, ecological data, matlab data, self-organisation, vegetation patterns

CC0

RefWorks, BibTeX, Reference Manager, Endnote, DataCite, NLM, DC, CFF

by Olfa Jaïbi

For both sites, topographical data was retrieved from the ALOS World 3D 30m (AW3D30, v. 2.1) digital raster elevation model. This model describes the height above sea level (in m, rounded to the nearest integer), at a ground resolution of approximately 30m at the equator. The elevation data was preprocessed for the removal of artifacts by applying a global soft-thresholding on its dual tree complex wavelet transform. Specifically, we set a threshold of 0.9 on the first five dual-tree complex wavelet transform levels. From the preprocessed data, we calculated the slope gradient (in %) and slope aspect (in degrees). We first extracted square DEM windows of 33 by 33 cells (i.e. approximately 990m × 990m), centered on the image windows. We then applied a least squares fitting procedure of an unconstrained quadratic surface on the unweighted elevation values. This gave the following datasets.

• 2021-10-28 first online, published, posted

4TU.ResearchData

matlab file. and read me file.

Multistability of model and real dryland ecosystems through spatial self-organization

Mathematical Institute, Leiden University