HadEX: Indices of climate extremes
HadEX is a global land-based climate extremes data set produced through the co-ordination of the joint CCl/CLIVAR/JCOMM Expert Team on Climate Change Detection, Monitoring and Indices (ETCCDMI). It comprises of 27 indices of temperature and precipitation on a 2.5 ° x 3.75 ° grid from 1951 to 2003. The indices represent seasonal and/or annual values derived from daily data from about 2,500 temperature stations and 6,000 precipitation stations.
Trends in warm nights are almost entirely positive, and in many regions are statistically significant (denoted by solid black boxes) over this period. There has also been a commensurate decrease in extreme cold nights throughout much of the globe.
Patterns in rainfall extremes exhibit much greater regional structure than do temperatures. Only in a few regions are the changes in frequency of heavy rainfall events statistically significant. Across North America and north-west Europe there has tended to be an increase in the number of such events.
We also produce a gridded daily maximum/minimum temperature product, HadGHCND.
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