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Figure 2 | Heritage Science

Figure 2

From: Temporal humidity variations in the heritage climate of South East England

Figure 2

Statistical properties and of the Heathrow data and modeled output. (a) The probability distribution for Heathrow hourly and daily relative humidity 1961–1990. The hourly data is plotted as the number of occurrences each year at integer RH values, while the daily data is as the number of occurrences each year across the thirty year period. (b) The probability distribution for Heathrow hourly absolute humidity (diamonds) and mixing ratio (squares) 1961–1990 plotted as the number of occurrences each year at integer values. (c) Daily relative humidity calculated on the basis of summing hourly absolute humidity (RH') as a function of daily average relative humidity for the period 1949–2010. (d) The probability distribution for Heathrow daily relative humidity from the UKCP09 output for the 30 years centered at 1975 as the number of occurrences each year at integer RH values. Inset: the annual average RH for 3000 predictions as the number each year at integer RH values (e) The relative humidity at 0900 hrs for Gatwick RHG as a function of that at Heathrow RHH for 1972. Inset RH: RHG measured at 0900 hrs the daily average RH for Gatwick 1972 - the tick marks have the same values as the larger figure. (f) The absolute humidity for 0900 hrs at Gatwick AHG as a function of that at the same time at Heathrow AHH for 1972. Inset AH: AHG determined at 0900 hrs plotted against the daily average AH for Gatwick 1972 - the tick marks have the same values as the larger figure. Inset MR: The mixing ratio for Gatwick at 0900 hrs plotted against the mixing ratio at Heathrow for the same time in 1972 - the tick marks have the same values as the larger figure except that the units are g kg-1.

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