In a 1965 paper [ 14], Lorenz suggested that, instead of running one forecast from a best guess of the initial state, one should run an ensemble of many forecasts, each from a statistically equivalent estimate of the initial state, to give a Monte Carlo estimate of the forecast uncertainty for a given weather model.
Ensemble forecasting entails the production of many forecasts in order to reflect the uncertainty in the initial state of the atmosphere (due to errors in the observations and insufficient sampling).
Over the years, many forecasting techniques of varying capabilities have been introduced.
Analysts do not expect Wall Street to reprise that remarkable performance over the next year, but many forecasts call for steady growth of 10 to 20 percent.
In comparison, a gallon of diesel made from crude oil now costs more than $2, even before refining, and many forecasts are for the price of oil to go higher.
The government forecasts growth of 2.8% this year; many forecasts by private economists are lower.The lag is already eroding the popularity that Lula depends upon to push through reforms.
But corporate results have surpassed many forecasts.
Despite many forecasting (hoping?) that herds of unicorns would enter the public market in 2016, the IPO market was lackluster at best.
Several investment banks upgraded near-term forecasts for China's growth after a run of strong data for August, including factory output and exports, and many now have forecasts of full-year growth above the government's official target rate of 7.5 percent.
Although many Californians hope forecasts of a "Godzilla" El Niño will deliver drought-busting rains this winter, mention of the mysterious climate phenomenon inspires dread in much of the world.
