How much has the average global temperature changed over the past 20 years?
For starters, according to the Rough Guide to Climate Change, the actual temperature of the Earth is about 58 degrees Fahrenheit. This USA TODAY graphic shows how the average global temperature has changed, not only for the past 20 years, but for the past 2,000 years: The best original sources for data about the Earth’s global temperature are the Climatic Research Unit at the University of East Anglia in England and NASA’s Goddard Institute for Space Studies in New York City. — Doyle Rice ****************************************************************************************** Q: Every time I watch the weather, they always show what path the jet stream takes. My question is: How do you determine what path the jet stream takes?— Steve Dickinson A: Good question. To find the jet stream, meteorologists analyze current conditions in the upper atmosphere to find the areas of strongest winds. Those current conditions can plotted on maps. For example, here is a map of the Northern Hemisphere
