Influence of meteorological phenomena on worldwide aircraft accidents in the period 1967-2010

Based on the information available in databases from relevant national and international organizations from1967 to 2010, an Aviation Weather Accidents Database (AWAD) was built. According to the AWAD, the weather is theprimary cause in a growing percentage of annual aircraft accidents: from about 40% in 1967 to almost 50% in 2010. Whilethe absolute number of fatalities and injured people due to aircraft accidents has decreased significantly, the percentage offatalities and injured people in accidents attributed to the weather shows a slight increase in the studied period. The influenceof turbulence, clear air turbulence, wind shear, low visibility, rain, icing, snow and storms on aircraft accidents was analysed,considering the different phases of flight, the meteorological seasons of the year and the spatial distribution over four zones ofthe Earth. These zones were defined following meteorological and climatological criteria, instead of using the typical politicalcriteria. A major part of the accidents and accidents attributed to the weather occur in latitudes between 12? and 38? in bothhemispheres. It is concluded that actions aimed at reducing the risk associated with low visibility, rain and turbulence, in thisorder, should have priority to achieve the most significant improvements in air transport safety.