31 May 2021 – by Ben St. Laurent
The latest research indicates that climate change could put a third of global food production at risk under high emission scenarios. According to this report, “[t]he most vulnerable areas are the ones at risk of leaving [Safe Climate Spaces] with low resilience to cope with the change, particularly South and Southeast Asia and Africa’s Sudano-Sahelian Zone. The Sudano-Sahelian Zone is a bioclimatic belt extending from the southern edge of the Sahara Desert into the Sub-Saharan savannahs of many African countries. In Ghana, worsening climatic conditions have already displaced many agricultural workers from the Sudano-Sahelian Zone in Ghana’s Upper West Region. The Water & Development Research Group at Aalto University indicated that these trends in agricultural migration, if planned for sustainably, could provide a solution to potential decreases in crop yields.
A study published in Nature Communications expands on the concept of ‘crop migration’ — whereby agricultural workers migrate to more suitable areas for cultivation, which mitigates damaging impacts of climate change on crop yield. But when unplanned, climate displacement creates refugees prone to higher rates of unemployment, homelessness, and poverty. The researchers conclude that crop migration is substantially responsible for maintaining crop yields in the face of changes to the climate sustained over the past few decades. But they warn that “continued migration may incur substantial environmental costs and will depend on socio-economic and political factors in addition to land suitability and climate.”
Current projections indicate that climate change is likely to raise global temperatures above the 2°C goal of the 2015 Paris Agreement. However, climate change will have differing effects on agriculture in various regions. Shifts in the winemaking industry illustrate this phenomenon clearly. While grape cultivation is expanding to include regions that have historically been too cold, vineyards in California and Australia have been devastated by wildfires which have displaced agricultural workers. While crop migration can help maintain current levels of agricultural production, the lack of supportive policy leads to unsustainable outcomes for migrants. Without such policies, current trends in crop migration could collapse, resulting in more climate refugees and reduced global agricultural production.
