Dataset Open Access

Heatwave indexes 1980-2018

Chambers, Jonathan

Heatwaves were defined as minimum temperature exceeding the 99th percentile of minimum temperature for the reference period (1986-2005) for four or more days.

From this definition, four heatwave indicators are derived:

Number of heatwave instances

Total number of days of heatwave

Heatwave degree-days over threshold, being the sum of the differences between the daily temperatures and the 99th percentile threshold

Mean length of heatwaves

Heatwave  mean degrees over threshold, being the heatwave degree-days divided by the total number of days.

 

These definitions were applied to ECMWF ERA5 temperature data at 0.5˚ grid resolution for the years 1980-2018. Each indicator is provided in a separate file.

 

Files (324.5 MB)
Name Size
heatwave_mean_length.nc
md5:5963fec2f5998c8e76f8905a8c43d653
81.1 MB Download
heatwaves_counts.nc
md5:32d5eff5a8f705f1396e84265007b795
81.1 MB Download
heatwaves_days.nc
md5:478410a19edf883cc0fb25add02d85bf
81.1 MB Download
heatwaves_deg_days.nc
md5:0b958e8424ba69f872743fb861e01fd3
81.1 MB Download
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