Global maps of cropland extent and change show accelerated cropland expansion in the twenty-first century
By Peter V. Potapov, Svetlana Turubanova, Matthew C. Hansen, Alexandra Tyukavina, V. Zalles, Ahmad Khan, Xiao‐peng Song, A. Pickens, Quan Shen, Jocelyn Cortez. Nature Food, 2021
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Spatiotemporally consistent data on global cropland extent is essential for tracking progress towards sustainable food production. In the present study, we present an analysis of global cropland area change for the first two decades of the twenty-first century derived from satellite data time-series. We estimate that, in 2019, the cropland area was 1,244 Mha with a corresponding total annual net primary production (NPP) of 5.5 Pg C year−1. From 2003 to 2019, cropland area increased by 9% and cropland NPP by 25%, primarily due to agricultural expansion in Africa and South America. Global cropland expansion accelerated over the past two decades, with a near doubling of the annual expansion rate, most notably in Africa. Half of the new cropland area (49%) replaced natural vegetation and tree cover, indicating a conflict with the sustainability goal of protecting terrestrial ecosystems. From 2003 to 2019, global per-capita cropland area decreased by 10% due to population growth. However, the per-capita annual cropland NPP increased by 3.5% as a result of intensified agricultural land use. The presented global, high-resolution, cropland map time-series supports monitoring of natural land appropriation at the local, national and international levels. High-resolution satellite observations provide an accurate and cost-effective solution to monitoring national and global progress towards Sustainable Development Goals. With a new global cropland dataset, this study reports that during the first two decades of the twenty-first century, the global cropland area increased by 9%, whereas the per-capita cropland area decreased by 10% and the per-capita annual cropland net primary production increased by 3.5%.
Subfields: Ecology, Ecology, Evolution, Behavior and Systematics, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/31acb8ce7c2c1c7ada5d98e58e8a8915d927b187
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Citations in the corpus
- Adapting agriculture to climate change via sustainable irrigation: biophysical potentials and feedbacks (2022, background): “The first, referred to as extensification, consists of converting natural lands into croplands [12], a practice often considered unacceptable because of its collateral damages to the planet’s biodiversity and carbon emissions [13–16].”