Abstract
AbstractThe climate of West Africa is expected to become more arid due to increased temperature and uncertain rainfall regimes, while its population is expected to grow faster than the rest of the world. As such, increased demand for food will likely coincide with declines in agricultural production in a region where severe undernutrition already occurs. Here, we attempt to discriminate between the impacts of climate and other factors (e.g. land management/degradation) on crop production across West Africa using satellite remote sensing. We identify trends in the land surface phenology and climate of West African croplands between 2000 and 2018. Using the combination of a an attribution framework and residual trend anlaysis, we discriminate between climate and other impacts on crop productivity. The combined effect of rainfall, land surface temperature and solar radiation explains approximately 40% of the variation in cropland productivity over West Africa at the 95% significance level. The largest proportions of croplands with greening trends were observed in Mali, Niger and Burkina Faso, and the largest proportions with browning trends were in Nigeria, The Gambia and Benin. Climate was responsible for 52% of the greening trends and 25% of the browning trends. Within the other driving factors, changes in phenology explained 18% of the greening and 37% of the browning trends across the region, the use of inputs and irrigation explained 30% of the greening trends and land degradation 38% of the browning trends. These findings have implications for adaptation policies as we map out areas in need of improved land management practices and those where it has proven to be successful.
Funder
Svenska Forskningsrådet Formas
Vetenskapsrådet
Publisher
Springer Science and Business Media LLC
Reference85 articles.
1. IPCC. Climate Change 2014: Impacts, Adaptation, and Vulnerability. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. (Cambridge, UK, 2014).
2. Sultan, B. & Gaetani, M. Agriculture in West Africa in the Twenty-First Century: Climate Change and Impacts Scenarios, and Potential for Adaptation. Frontiers in Plant Science 7, 1262, https://doi.org/10.3389/fpls.2016.01262 (2016).
3. Mora, C. et al. The projected timing of climate departure from recent variability. Nature 502, 183–187, https://doi.org/10.1038/nature12540 (2013).
4. Sylla, M. B., Elguindi, N., Giorgi, F. & Wisser, D. Projected robust shift of climate zones over West Africa in response to anthropogenic climate change for the late 21st century. Climatic Change 134, 241–253, https://doi.org/10.1007/s10584-015-1522-z (2016).
5. Giannini, A., Biasutti, M., Held, I. M. & Sobel, A. H. A global perspective on African climate. Climatic Change 90, 359–383 (2008).
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