The localised modification of weather, intended or inadvertent, is difficult to detect due high level of natural variation in weather conditions and the reliance on observational as opposed to controlled experimental data. As a consequence statistical analysis often generates inconclusive results when using standard scientific precedents with respect to hypothesis testing. In fact, most cloud s...

BACKGROUND Synoptic circulation patterns (large-scale weather systems) affect ambient levels of air pollution, as well as the relationship between air pollution and human health. OBJECTIVE To investigate the air pollution-mortality relationship within weather types and seasons, and to determine which combination of atmospheric conditions may pose increased health threats in the elderly age ca...

Abstrac t . The Fosberg fire weather index is a simple tool for evaluating the potential influence of weather on a wildland fire based on temperature, relative humidity and wind speed. A modification to this index that includes the impact of precipitation is proposed. The Keetch-Byram drought index is used to formulate a ‘fuel availability’ factor that modifies the response of the fire weather ...

Pollution levels and the effect of air pollution on human health can be modified by synoptic weather type and aeroallergens. We investigated the effect modification of aeroallergens on the association between CO, O3, NO2, SO2, PM10 and PM2.5 and asthma hospitalisation rates in seven synoptic weather types using single air pollutant models, adjusted for the effect of aeroallergens and stratified...

I prepared a position paper on “Weather and Climate Engineering” for a workshop on “Perturbed Clouds in the Climate System” organized by the Frankfurt Institute for Advanced Studies (FIAS) held in Frankfurt, Germany in March 2008. The position paper will eventually be a chapter in a book. I think it is appropriate to share with the weather modification community the main points of this position...