Met Office Hadley Centre observations datasets
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HadISDH Decadal Trends from version 4.0.0.2017f


Trends are calculated using the median of pairwise slopes. Gridboxes with borders are where trends are considered to be significant because both the 5th and 95th confidence intervals are of the same sign (positive or negative). The dark grey coverage across the right-hand-side of panel b) shows the proportion of land at that latitude band. The light grey coverage shows the proportion of that land that has observations available.

1973 to 2017 1973 to 1999 2000 to 2017
Specific Humidity (q)
1973 to 2017 1973 to 1999 2000 to 2017
Relative Humidity (RH)
1973 to 2017 1973 to 1999 2000 to 2017
Vapour Pressure (e)
1973 to 2017 1973 to 1999 2000 to 2017
Dew Point Temperature (Td)
1973 to 2017 1973 to 1999 2000 to 2017
Wet Bulb Temperature (Tw)
1973 to 2017 1973 to 1999 2000 to 2017
Dew Point Depression (DPD)
1973 to 2017 1973 to 1999 2000 to 2017
Air Temperature (T)
1973 to 2017 1973 to 1999 2000 to 2017