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Artykuły w czasopismach na temat "Risque agro-Climatique"
Andrieu, Nadine, Eduardo Chia i Eric Vall. "Recherche et innovations dans les exploitations de polyculture-élevage d’Afrique de l’Ouest Quelles méthodes pour évaluer les produits de la recherche ? Conclusion générale". Revue d’élevage et de médecine vétérinaire des pays tropicaux 64, nr 1-4 (1.01.2011): 93. http://dx.doi.org/10.19182/remvt.10121.
Pełny tekst źródłaCOULON, JB, P. LECOMTE, M. BOVAL i J. M. PEREZ. "Introduction générale". INRAE Productions Animales 24, nr 1 (3.03.2011): 5–8. http://dx.doi.org/10.20870/productions-animales.2011.24.1.3232.
Pełny tekst źródłaNassourou, Lawali Mamane, Benoît Sarr, Agali Alhassane, Seydou Traoré i Balla Abdourahamane. "Perception et observation : les principaux risques agro-climatique de l’agriculture pluviale dans l’ouest du Niger". VertigO, Volume 18 numéro 1 (25.05.2018). http://dx.doi.org/10.4000/vertigo.20003.
Pełny tekst źródłaRozprawy doktorskie na temat "Risque agro-Climatique"
Laurent, Léa. "Evolution des risques agro-climatiques en lien avec les modifications de l'aléa climatique en contexte de réchauffement". Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCK007.
Pełny tekst źródłaClimate change modifies climatic hazards and requires a reconsideration of agro-climatic risks. In France, since the 1960s, climate change has resulted in an abrupt rise in surface air temperature around 1987/1988. These rapid changes in climatic hazards are likely to modify agro-climatic risks and lead to historic crop losses. Understanding the regional effects of climate change on agro-climatic risks is therefore a major challenge for the agricultural sector. Drought is one of the agro-climatic risks that have a major impact on crop production and climatic crop insurance. This work, which results from a collaboration between an insurance company and a research laboratory, investigates how and to what extent changes in climatic hazards affect drought risk, and ultimately the performance of climatic crop insurance. Since wheat, maize and vineyards are the main crops in the company's portfolio, agro-climatic risk modifications will be studied specifically for these crops of interest.The Safran-Isba-Modcou dataset, produced by Météo-France, allows to quantify structural changes in climatic hazard linked to water cycle on a regional scale over the period 1959-2021. Taking crop vulnerability into account by using a simplified water balance model provides an opportunity to assess changes in water constraint for each production basin of the crops of interest. The definition of a water stress threshold for the crops studied enables to develop a drought index. The statistical distributions of the latter are probabilized using a Tweedie model, resulting in a regionalized characterization of drought risk structural modifications after the rapid warming observed in France.After the rapid warming of 1987/1988, evaporative demand increases sharply, particularly in spring and summer. This leads to a progressive drying-up of soil water reservoirs, increasing water stress on vegetation cover. Taking into account the vulnerability of the crops of interest shows that for winter bread wheat, for example, the water balance changes consequently. Periods when the water stress threshold is exceeded are lengthened or intensified with warming, depending on the production basin considered. These trends can be explained by a sharp increase in evapotranspiration. At the end of the growing season, changes in dry spells also play a role. This affects the structure of the drought-related agro-climatic risk, translating into an increase in the intensity and/or the occurrence of drought episodes. These changes depend on the production basin studied, and are associated with an increase in extreme droughts.The changes in drought risk, resulting from the rapid evolution of climatic hazards, affect sensitive crop stages, and can lead to significant yield losses. The performance of climatic crop insurance is therefore closely linked to changes in this type of risk. Given certain conditions, the drought index developed in this work shows a good correlation with the loss ratio used by insurance companies. This opens up new avenues for studying the volatility of climatic crop insurance performance. However, we need to refine and consolidate these results, which do not show any convincing improvement for certain crops such as wheat. The projection of these drought indices could help insurers to develop and experiment territorialized prevention and adaptation strategies that are relevant to all stakeholders
Raporty organizacyjne na temat "Risque agro-Climatique"
Gbedomon, Rodrigue Castro, Sidol Houngbo i Fréjus Thoto. Profil de l’agriculture numérique et de l’adaptation aux changements climatiques Cas du Bénin. Centre Africain pour le Développement Equitable, czerwiec 2024. http://dx.doi.org/10.61647/aa84576.
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