23
(c) 2000
D.B.Stephenson@reading.ac.uk
Persistence in the NAO Time Series
Note
the persistence in a)
and the slow predictable movement in b).
a) Daily
NAO index (1 Jan. 1989 to 30 Dec. 1997)
b) Accumulated
Daily NAO index
(1 Jan. 1989 to 30 Dec. 1997)
3
1
-1
-3
400
200
0
1989 1990 1991 1992 1993 1994 1995 1996 1997
1998
1989 1990 1991 1992 1993 1994 1995 1996 1997
1998