138
a=O B=O
runmeanc.50
6 .0 ,---_ _ _ _ ---~----r__---_-..,
a)
4 .0
2.0
0.0
/
·2.0
·4.0
.6·~OO L.0 ----JOO-'- .0:------=-SOO:::-:-.0--------'7=OO':-.0 :-----: 900 -:-:-:. 0:--...J
a=.12 B=.3
runmean-50
6.0 . - - - - - -- - - -- - , - - - - -, . . - - - - - --,
b)
4 .0
2.0
0.0
·2.0
·4 .0
.6·?OOL. 0 - - - - JOO -'- .0:------=-SOO:::-:-.0---:7:::00=- .0 :-----:: 900:::-: .0:----'
a=.126=.3
runmean=50
6.0 ,---- -- - - - -- - , - - - -- , . . - -- - - -...,
c)
4.0
2.0
0.0
'2.0
-4.0
.6·?OO L.0 ----: JOO :::-: .0:----:::500::-.::-0---:7~OO::--:.0:-----=:;;------'
Figure 27: Time series of the X-component of the modified Lorenz model (5.1) with a)
a = 0, j3 = 0 b)a = 0.12, j3 = 0.3, c) an ensemble of integrations of the Lorenz model with
a = 0.12, j3 = 0.3 in which very small perturbations are introduced at t=400.