Resumo

DE RUYVER, Roberto; DENEGRI, María J.  e  ORICCHIO, Patricio. Frost risk map for the south of Buenos Aires province using satellite and surface data. Meteorologica [online]. 2012, vol.37, n.1, pp.37-46. ISSN 1850-468X.

Cold temperature can cause severe damage in crops when a cold front irruption occurs. This is especially true in some specific periods on the growing crops mainly during spring. This work presents frost risk maps for wheat. The region selected was the south of Buenos Aires province in Argentina. Wheat covers almost 2,2 million ha in south Buenos Aires area which represents 40% of the total wheat cultivated in Argentina At the same time, south Buenos Aires area suffers the biggest damage on wheat because of frost during spring time. The study was carried out based on channels 3, 4 and 5 of NOAA satellite images (1,09 km² spatial resolution). Images from 2005 to 2008 were available. Minimum daily temperatures from "Servicio Meteorológico Nacional" (SMN) and "Instituto Nacional de Tecnología Agropecuaria" (INTA) were also used. Risk area is increased in areas which combine lower altitudes and higher distance to the Ocean. Areas near the Ocean are associated to areas with lower frost risk. This methodology can be applied for different crops and different areas and It would be a useful tool for management policies.

Palavras-chave : Frost; Frost mapping; Remote sensing; Wheat.

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