Station 11: Bradwell 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 BRADWELL POWER STATION at 51° 45' N, 0° 54' E
| Year |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
mean |
| 1964 |
4.0 |
4.5 |
5.0 |
8.5 |
15.0 |
17.5 |
19.5 |
19.5 |
16.5 |
12.5 |
9.5 |
6.5 |
11.5 |
| 1965 |
4.0 |
4.5 |
5.5 |
10.5 |
14.0 |
16.0 |
17.0 |
17.5 |
16.0 |
14.0 |
8.5 |
5.5 |
11.1 |
| 1966 |
4.3 |
5.7 |
7.8 |
8.5 |
13.4 |
18.5 |
18.0 |
18.0 |
18.0 |
14.0 |
8.5 |
6.0 |
11.7 |
| 1967 |
4.0 |
5.5 |
7.5 |
9.0 |
13.0 |
17.5 |
20.5 |
19.5 |
17.5 |
13.5 |
8.5 |
5.5 |
11.8 |
| 1968 |
4.5 |
4.5 |
6.5 |
10.6 |
13.8 |
16.7 |
17.8 |
17.6 |
16.4 |
14.8 |
9.7 |
6.8 |
11.6 |
| 1969 |
5.5 |
3.7 |
4.7 |
8.6 |
13.5 |
16.8 |
20.3 |
20.2 |
17.2 |
15.2 |
9.9 |
3.7 |
11.6 |
| 1970 |
3.2 |
4.5 |
4.4 |
6.5 |
13.6 |
18.2 |
18.5 |
19.1 |
16.9 |
13.5 |
9.4 |
7.0 |
11.2 |
| 1971 |
4.8 |
6.3 |
6.5 |
9.2 |
12.3 |
15.8 |
19.5 |
18.9 |
17.2 |
13.5 |
9.1 |
6.8 |
11.7 |
| 1972 |
5.5 |
4.7 |
6.5 |
9.6 |
12.5 |
15.0 |
18.6 |
17.8 |
15.0 |
12.5 |
9.3 |
7.0 |
11.2 |
| 1973 |
5.8 |
5.4 |
7.2 |
8.4 |
12.3 |
18.0 |
19.0 |
19.5 |
17.5 |
12.1 |
9.4 |
4.8 |
11.6 |
| 1974 |
6.0 |
7.0 |
6.9 |
10.2 |
12.8 |
16.3 |
18.5 |
18.7 |
15.6 |
10.4 |
7.5 |
6.5 |
11.4 |
| 1975 |
6.7 |
5.5 |
5.9 |
7.8 |
11.9 |
15.7 |
18.5 |
21.1 |
17.8 |
13.2 |
9.9 |
6.2 |
11.7 |
| 1976 |
6.8 |
3.5 |
5.9 |
9.7 |
12.6 |
17.6 |
21.8 |
19.6 |
17.4 |
15.3 |
10.9 |
5.5 |
12.2 |
| 1977 |
5.0 |
6.5 |
9.0 |
9.1 |
13.0 |
15.7 |
19.0 |
18.5 |
17.0 |
14.0 |
10.0 |
7.0 |
12.0 |
| 1978 |
4.5 |
3.7 |
7.5 |
8.4 |
12.1 |
17.4 |
17.1 |
18.5 |
16.7 |
13.2 |
12.1 |
6.5 |
11.5 |
| 1979 |
2.3 |
2.6 |
6.0 |
9.2 |
11.5 |
16.4 |
18.4 |
18.4 |
16.6 |
14.4 |
9.1 |
7.3 |
11.0 |
| 1980 |
3.3 |
4.4 |
|
|
|
|
|
|
|
|
|
|
|
| 1981 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1982 |
|
6.3 |
8.2 |
11.7 |
14.7 |
19.1 |
19.5 |
19.5 |
17.2 |
13.7 |
11.1 |
6.4 |
|
| 1983 |
6.4 |
3.5 |
6.9 |
8.5 |
13.3 |
17.4 |
21.5 |
20.5 |
15.7 |
12.6 |
9.3 |
6.9 |
11.9 |
| 1984 |
5.5 |
5.0 |
5.8 |
9.3 |
12.2 |
16.5 |
18.8 |
21.2 |
16.9 |
13.4 |
10.9 |
7.7 |
11.9 |
| 1985 |
3.3 |
2.5 |
3.8 |
9.4 |
11.4 |
15.5 |
19.2 |
17.6 |
16.7 |
15.5 |
8.6 |
7.0 |
10.9 |
| 1986 |
4.5 |
2.6 |
3.9 |
7.4 |
12.8 |
16.0 |
20.2 |
18.8 |
14.9 |
14.1 |
10.2 |
8.2 |
11.1 |
| 1987 |
2.6 |
3.2 |
4.9 |
10.2 |
13.6 |
15.7 |
20.3 |
18.3 |
18.6 |
14.0 |
11.1 |
7.5 |
11.7 |
| 1988 |
7.6 |
6.2 |
7.5 |
9.7 |
14.4 |
16.9 |
18.2 |
18.9 |
16.6 |
14.1 |
9.6 |
7.4 |
12.3 |
| 1989 |
7.8 |
7.6 |
8.2 |
9.4 |
15.3 |
17.4 |
19.9 |
|
|
|
|
8.0 |
|
| 1990 |
6.8 |
7.1 |
8.4 |
10.1 |
15.7 |
16.8 |
18.5 |
20.6 |
16.8 |
13.9 |
10.4 |
6.2 |
12.6 |
| 1991 |
5.0 |
2.4 |
7.7 |
9.8 |
11.8 |
14.5 |
19.2 |
20.7 |
17.9 |
13.1 |
9.5 |
6.9 |
11.5 |
| 1992 |
6.9 |
5.7 |
8.5 |
10.4 |
10.0 |
|
21.0 |
18.9 |
16.5 |
13.5 |
9.2 |
7.5 |
|
| 1993 |
7.0 |
5.5 |
7.2 |
11.1 |
14.5 |
18.0 |
18.6 |
18.4 |
16.7 |
11.9 |
7.2 |
5.7 |
11.8 |
| 1994 |
5.4 |
4.4 |
7.3 |
9.3 |
14.1 |
17.0 |
21.9 |
20.6 |
16.0 |
12.7 |
11.4 |
9.1 |
12.4 |
| 1995 |
4.9 |
7.0 |
7.1 |
10.9 |
13.4 |
16.4 |
20.7 |
22.3 |
13.7 |
14.7 |
10.2 |
5.4 |
12.2 |
| 1996 |
4.7 |
2.3 |
4.7 |
8.8 |
11.5 |
17.4 |
18.4 |
19.7 |
15.7 |
13.6 |
9.8 |
5.0 |
11.0 |
| 1997 |
2.1 |
4.8 |
8.6 |
11.0 |
13.7 |
17.2 |
19.1 |
20.0 |
17.9 |
14.2 |
9.8 |
6.9 |
12.1 |
| 1998 |
6.3 |
4.9 |
7.8 |
10.0 |
14.2 |
16.7 |
17.7 |
19.6 |
16.5 |
13.3 |
9.1 |
5.4 |
11.8 |
| 1999 |
6.3 |
5.4 |
8.0 |
10.7 |
11.0 |
15.0 |
17.5 |
20.1 |
|
|
|
|
|
| 2000 |
|
|
|
|
|
|
18.4 |
17.3 |
19.7 |
13.1 |
11.8 |
7.9 |
|
| 2001 |
4.1 |
5.9 |
6.0 |
9.4 |
13.1 |
17.4 |
20.0 |
20.9 |
17.2 |
15.3 |
10.6 |
6.7 |
12.2 |
| 2002 |
3.7 |
7.8 |
8.0 |
|
|
|
|
|
|
|
|
|
|
| Whole data set |
| mean |
5.0 |
4.9 |
6.7 |
9.5 |
13.1 |
16.8 |
19.2 |
19.3 |
16.8 |
13.6 |
9.7 |
6.6 |
|
| count |
36 |
37 |
36 |
35 |
35 |
34 |
36 |
35 |
34 |
34 |
34 |
35 |
|
| sd |
1.48 |
1.51 |
1.41 |
1.10 |
1.27 |
1.05 |
1.25 |
1.21 |
1.11 |
1.07 |
1.11 |
1.08 |
|
| 1971 - 2000 |
| mean |
5.3 |
4.9 |
6.9 |
9.6 |
12.9 |
16.6 |
19.3 |
19.4 |
16.7 |
13.5 |
9.9 |
6.8 |
|
| count |
27 |
28 |
27 |
27 |
27 |
26 |
28 |
27 |
26 |
26 |
26 |
27 |
|
| sd |
1.57 |
1.60 |
1.40 |
1.02 |
1.37 |
1.07 |
1.26 |
1.21 |
1.22 |
1.07 |
1.17 |
1.03 |
|
Source: BNFL, CEGB
