Presentation of results
For each inshore temperature station, there is a Figure ‘a’: Monthly mean surface temperature for the entire duration of the record at the station which are derived from simple averaging of all the monthly data.
For those stations with records from 1971 – 2000, there is a Figure ‘b’ and Figure ‘c’:
Figure ‘b’: Monthly climatic average with the first standard deviation. The standard deviation has been derived from the difference in the monthly average from the long-term mean (1971 – 2000).
Figure ‘c’: Yearly anomaly from the base period. Where the average base period temperature (1971 – 2000) has been subtracted from the average annual temperature. The standard deviation of the annually averaged temperature of the entire record is also shown. A trend line derived from a linear least squares analysis has been added to indicate the extent to which annual changes are linear.
For the three stations with long records; Eastbourne, Dover and Port Erin, two trend lines are presented, one covering the period from 1965 – 2004, to match the figures above (a, b and c) and the other over the entire record.
For the ferry route temperature and salinity data there is a figure ‘a’, ‘b’ and ‘c’.
Data are presented from three of the ferry route stations namely Position 2, Position 4 and Position 7. These stations have been selected from a group analysis as being indicative of the trends in three separate regions across the channel. Thus P2 represents stations P1, P2 and P3; P4 represents P4, P5 and P6 and station 7 is indicative of P7, P8 and P9.
The monthly mean sea surface temperatures and standard deviation for 38 stations around the English and Welsh coast are presented in tabular format for all of the stations. For stations whose record covers the base period of 1971 – 2000, the mean, count and stdev from 1971 to 2000 is also presented.
For the ferry route data, the monthly mean sea surface temperatures and salinity for 9 positions across the Southern Bight of the North Sea are also available in tabular format.
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