The frequency of alert occurrences is a function of the stochastic model used to generate rain.
The performance is assessed by comparing measured and modelled water levels at a weir downstream of a highly impermeable, well defined, 64 ha urban catchment, for nine overflow generating rain events.
Thus if we compare days with and without rain, in an area generating rain we predict that on rainy days we will observe greater local atmospheric pressure just prior to rain falling, i.e. more water vapour raises both atmospheric pressure and the likelihood of subsequent rain.
Replanting degraded forests not only soaks up carbon dioxide from the atmosphere, it also generates rain and -- when managed sustainably -- provides building materials, edible plants and other forest products.
During April 1947 two of the squadron's Mustangs took part in a Commonwealth Scientific and Industrial Research Organisation cloud seeding experiment; in this role the aircraft sprayed silver iodide onto clouds from tanks beneath their wings with the goal of generating rain.
Separate studies by Roni Avissar at Duke University in North Carolina and Yabzinda Mali at Oxford University in England show that tropical rain forests generate rainfall as far away as the United States and Europe.
Rain Room generates artificial rain to create the exhilarating sensation of walking through a stormy night, while at the same time using sensors to block the cascading water droplets, keeping its attendees completely dry.
This year, however, is the strongest La Niña since 1974, and the warm water around Australia and Indonesia, with nowhere to escape, has generated heavy rain clouds that have burst over Queensland.
In 2003, a report by the National Academies of Sciences said that despite ongoing efforts to seed clouds in several countries and American states, there was no reliable evidence that the techniques generated more rain than the clouds would have disgorged anyway.
