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No historical evidence for increased vulnerability of French crop production to climatic hazards

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Schauberger,  Bernhard
Potsdam Institute for Climate Impact Research;

Makowski,  David
External Organizations;

Tamara,  Ben-Ari
External Organizations;

Julien,  Boé
External Organizations;

Ciais,  Philippe
External Organizations;

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Volltexte (frei zugänglich)

25551oa_postprint.pdf
(Postprint), 3MB

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Zitation

Schauberger, B., Makowski, D., Tamara, B.-A., Julien, B., Ciais, P. (2021): No historical evidence for increased vulnerability of French crop production to climatic hazards. - Agricultural and Forest Meteorology, 306, 108453.
https://doi.org/10.1016/j.agrformet.2021.108453


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_25551
Zusammenfassung
Recent adverse weather events have questioned the stability of crop production systems. Here, we assessed the vulnerability of eleven major crops in France between 1959 and 2018 as a function of climate, crafting a novel hazard framework that combines exposure and sensitivity to weather-related hazards. Exposure was defined as the frequency of hazardous climate conditions. Sensitivity of crops was estimated by the yield response to single and compound hazards, using observed yields available at département (county) level. Vulnerability was computed as the exposure-weighted average of crop sensitivities. Our results do not reveal any evidence for historically increased vulnerability of French crop production. Sensitivity to adverse weather events, and thus the overall vulnerability, has significantly decreased for six of the eleven crops between 1959 and 2018, and shown no significant decline or remained stable for the other five. Yet compound hazards can induce yield losses of 30% or more for several crops. Moreover, as heat-related hazards are projected to become more frequent with climate change, crop vulnerability may rise again in the future.