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Station 10: Sizewell PS

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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.

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 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).

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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.

Monthly Mean Sea Temperature for SIZEWELL POWER STATION at 52° 13' N, 1° 38' E

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec mean
1967 4.0 4.7 5.2 7.0 10.0 13.5 16.0 17.0 16.0 13.5 8.3 5.6 10.1
1968 3.2 3.1 4.3 7.9 10.7 14.7 16.5 16.5 16.4 14.4 9.5 6.7 10.3
1969 4.3 3.0 3.0 6.5 11.0 14.2 17.0 17.0 16.3 15.2 10.1 5.5 10.3
1970 4.5 4.3 4.1 6.0 10.5 15.5 16.5 17.6 15.8 14.0 10.4 7.2 10.5
1971 5.5 5.6 5.7 8.5 12.0 15.6 18.3 18.7 17.6 14.2 10.0 7.1 11.6
1972 5.6 4.9 6.2 9.0 11.2 13.9 17.0 17.7 15.6 12.8 9.8 6.8 10.9
1973 6.3 6.0 6.0 7.4 10.3 15.4 18.0 18.0 17.9 13.6 9.5 4.9 11.1
1974 5.1 6.9 6.3 8.4 10.7 14.1 15.9 17.0 15.7 12.2 8.4 6.9 10.6
1975 5.9 6.2 6.1 7.0 9.9 13.2 17.4 19.5 18.4 14.1 10.9 7.3 11.3
1976 7.0 4.7 5.6 8.1 11.1 14.7 19.9 19.6 18.0 15.5 12.1 7.3 12.0
1977 4.7 5.5 7.2 7.9 11.3 14.0 16.7 17.6 16.4 14.2 10.6 7.0 11.1
1978 5.1 3.7 5.6 7.2 10.0 13.9 16.1 17.8 16.6 14.0 12.4 7.4 10.8
1979 4.0 3.0 4.3 7.0 9.8 14.9 17.2 18.0 17.2 14.4 10.7 8.2 10.7
1980 5.1 5.8 6.1 7.6 10.8 14.3 15.8 18.1 17.1 13.9 9.5 6.4 10.9
1981 5.1 5.0 5.5 8.1 9.9 14.1 16.0 17.7 17.6 13.5 10.5 6.4 10.8
1982 3.1 4.3 5.8 8.0 11.0 15.7 17.8 18.5 16.9 14.2 11.4 7.5 11.2
1983 6.4 3.9 5.4 7.2 11.2 14.6 18.8 19.3 16.9 14.0 10.3 7.3 11.3
1984 5.6 4.5 4.6 7.1 10.0 11.1 16.7 18.6 16.8 13.5 11.6 8.7 10.7
1985 3.8 2.8 4.0 7.6 9.3 13.1 16.6 16.8 16.4 15.5 9.9 7.2 10.3
1986 5.0 2.8 2.9 5.6 10.4 14.0 17.6 17.9 15.4 14.0 10.2 7.7 10.3
1987 4.4 4.0 4.0 7.5 10.1 13.0 17.1 16.8 17.1 14.1 11.7 7.5 10.6
1988 6.7 5.6 5.5 7.9 12.1 14.8 16.9 17.9 16.4 13.6 10.2 7.4 11.3
1989 7.0 6.5 6.9 8.1 12.3 15.5 18.8 19.2 17.9 14.9 11.6 8.0 12.2
1990 7.6 7.4 8.2 9.3 13.3 15.2 17.8 19.4 19.7 14.3 11.3 7.3 12.6
1991 5.6 3.4 6.2 8.7 10.1 13.8 17.4 19.6 18.7 14.3 10.3 7.4 11.3
1992 6.3 5.5 6.8 8.6 11.9 16.6 18.5 19.6 16.5 13.2 9.5 7.4 11.7
1993 6.1 6.0 6.2 9.4 13.3 16.4 17.9 18.1 16.5 12.2 8.7 6.3 11.4
1994 5.8 4.8 6.1 8.1 11.7 15.0 19.4 19.6 16.5 13.4 12.1 9.7 11.9
1995 5.8 6.4 6.7 8.9 12.0 14.9 19.4 21.9 18.6 16.5 13.1 8.0 12.7
1996 5.7 3.7 4.7 7.4 9.9 14.7 17.1 18.4 16.7 14.8 11.4 7.0 11.0
1997                           
1998 7.4 6.4 8.0 10.0 12.8 15.4 17.7 19.0 17.6 14.7 11.2 7.9 12.3
1999 7.3 6.6 8.3 9.8 13.2 17.0 20.1 20.7 20.1 17.1 13.2 9.1 13.5
2000 6.7 6.9 8.5 10.5 14.1 17.6 18.6 20.3 19.6 15.7 12.1 10.5 13.4
2001 7.5 7.8 7.3 8.9 10.2 15.4 19.6 21.1 18.9 17.0 13.4 9.8 13.1
2002 5.4 6.8 7.5 11.3 13.0 17.6 19.1 21.6 20.4 16.3 13.0    
2003 7.9 6.7 8.3 10.9 13.3 17.3 18.4 22.5 20.0 15.3 11.9 10.3 13.6
2004 7.9 7.6 7.6 10.5 13.3 16.8 18.6 21.4 20.0 16.1 13.5 10.1 13.6
Whole data set
mean 5.7 5.2 6.0 8.2 11.3 14.9 17.7 18.8 17.5 14.4 10.9 7.6  
count 37 37 37 37 37 37 37 37 37 37 37 36  
sd 1.28 1.46 1.47 1.32 1.30 1.39 1.20 1.55 1.41 1.19 1.38 1.30  
1971 - 2000
mean 5.7 5.1 6.0 8.1 11.2 14.7 17.7 18.7 17.3 14.2 10.8 7.5  
count 29 29 29 29 29 29 29 29 29 29 29 29  
sd 1.10 1.33 1.33 1.05 1.28 1.32 1.17 1.18 1.20 1.10 1.21 1.06