HadEX is a global land-based climate extremes dataset produced through the coordination 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 2500 temperature stations and 6000 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 N. America and NW Europe there has tended to be an increase in the number of such events.
Further information and data for HadEX are available
We also produce a gridded daily max/min temperature product, HadGHCND.
References
Alexander, L. V., et al., 2006, Global observed changes in daily climate extremes of temperature and precipitation, J. Geophys. Res., 111, D05109, doi:10.1029/2005JD006290.
