by C. Rotter, Feb 13, 2021 in WUWT
Guest Post by Tony Brown
Section 1 Introduction
A visit to the Botanical gardens in Cambridge was made by the author of this paper on August 7th 2020 between 10.15AM to 12.25pm. The purpose was to look at the site of the Stevenson screen there, following the establishment at this location of the highest ever recorded UK instrumental temperature, confirmed by the Met Office as 38.7 C ( 101.6 Fahrenheit ) taken at the gardens on 25 July 2019, and to determine the possible effects on this record caused by urbanisation. From the botanic garden web site we note:
“Analysis of the Garden’s weather records show that over the last 100 years our average temperature has risen by 1.2 Celsius and the hottest day, highest monthly and yearly average have all occurred within the last 20 years. The highest ever temperature recorded at the Garden before this new record was 36.9 C, recorded on 10 August, 2003.” * See; “Section 5; Temperature trends.”
Some context is provided by firstly examining the past and present urbanisation of the gardens, the location of the Stevenson screen and there then follows an examination of various temperature recordings locally to determine what affect if any the urbanisation may have had.
The visit was made during one of the hottest spells of the 2020 summer and in similar conditions to the record, in as much it had been hot in the days running up to the record with prolonged sunshine and light winds and these were mirrored on the day of the visit. The preceding day, August 6th 2020 was partially cloudy and very warm at 27C, close by at Cambridge Airport.