# Global Analysis - Annual 2013

Global Temperature Trends, Updated through 2013

« Global Analysis - Annual 2013

#### Global Temperature Trends, Updated through 2013

The following maps show the temperature trend for each qualifying grid point since the beginning of the 20^{th} century (top) and the last 30 years. The temperature trend is the average rate of increase or decrease at the grid point over the time period of interest. It is determined by simple linear regression through the data available for each grid point. They are expressed in degrees Celsius per decade. For the rate in degrees Celsius per century, multiply by 100.

Temperature trends since 1901

(all grids with at least 2/3 years present)

Temperature trends since 1984

(all grids with at least 80% years present)