HIGHLIGHT: The seasonal mean NINO3.4 anomaly was positive at 0.41 C for MJJ2014, not much higher than in AMJ.
The CA method, acting on global AMJ2014 seasonal means as latest input, but using a string of global SST going back one year, has all of its members staying positive but in the neutral zone for Nino34 thru JJA2014. By ASO 2014 most of the twelve members have exceeded the +0.5C threshold, and eleven members to +1.0K or more by late 2014, max=1.40K.
Some of the larger weights have changed from last month, indicative of an unsettled situation. There are many large weights, especially +ve weights. There are 11 (6) large +ve (-ve) weights in excess of abs(0.10). The last 10-15 years no longer have positive weights only and some older years have unusually high weights (1959 +0.17). 1988 (thru December 2012 that particular past situation was labeled 1986, and thru last month it was labelled 1987) carries on at -0.11. A remarkable case of determinism, lasting more than 2 years and ongoing still.
Table 1. Inner products (IP; scaled such that the sum of absolute values is 100; not shown) and weights (Wgt multiplied by 100.) of each of the years to construct an analogue to the sequence of 12 consecutive overlapping 3-month periods defined as the base (currently the 12 overlapping seasons string JJA2013 thru MJJ2014). Years in the table are labeled by the year of the middle month of the most recent predictor season. Weights for 1956 and 2013 are less (by 50%) because only half the members use these years ("early" members use 1956, "late" members 2013). Data currently thru Jul 2014.
Year |
IP |
Wgt |
Year |
IP |
Wgt |
Year |
IP |
Wgt |
Year |
IP |
Wgt |
Year |
IP |
Wgt |
Year |
IP |
Weigt |
1956 |
xx |
-5 |
1966 |
xx |
-7 |
1976 |
Xx |
1 |
1986 |
xx |
6 |
1996 |
xx |
0 |
2006 |
xx |
-6 |
1957 |
xx |
15 |
1967 |
xx |
-3 |
1977 |
Xx |
0 |
1987 |
xx |
-7 |
1997 |
xx |
11 |
2007 |
xx |
-4 |
1958 |
xx |
0 |
1968 |
xx |
10 |
1978 |
Xx |
2 |
1988 |
xx |
-11 |
1998 |
xx |
-2 |
2008 |
xx |
-1 |
1959 |
xx |
12 |
1969 |
xx |
-8 |
1979 |
Xx |
5 |
1989 |
xx |
3 |
1999 |
xx |
-13 |
2009 |
xx |
11 |
1960 |
xx |
-5 |
1970 |
xx |
-3 |
1980 |
Xx |
-5 |
1990 |
xx |
11 |
2000 |
xx |
-10 |
2010 |
xx |
15 |
1961 |
xx |
-15 |
1971 |
xx |
-5 |
1981 |
Xx |
-4 |
1991 |
xx |
9 |
2001 |
xx |
7 |
2011 |
xx |
10 |
1962 |
xx |
2 |
1972 |
xx |
1 |
1982 |
Xx |
-5 |
1992 |
xx |
3 |
2002 |
xx |
11 |
2012 |
xx |
5 |
1963 |
xx |
1 |
1973 |
xx |
6 |
1983 |
xx |
-8 |
1993 |
xx |
-2 |
2003 |
xx |
8 |
2013 |
xx |
10 |
1964 |
xx |
-12 |
1974 |
xx |
10 |
1984 |
Xx |
-4 |
1994 |
xx |
-6 |
2004 |
xx |
-6 |
xx |
Xx |
|
1965 |
xx |
-12 |
1975 |
xx |
-2 |
1985 |
Xx |
-2 |
1995 |
xx |
-4 |
2005 |
xx |
3 |
xx |
Xx |
Weights are high +ve (>+0.10) for 2013,2011, 2010, 2009, 2002,1997,1990,1974,1968,1959,1957
Weights are high -ve (< - 0.10) for 2000, 1999, 1988,1965,1964,1961
Ens ave Nino34 anomaly forecasts, for leads -3, -2, -1, 0 etc: in plain numbers (ensemble mean):
0.41 |
0.45 |
0.5 |
0.6 |
0.78 |
1.01 |
1.16 |
1.16 |
1.06 |
0.83 |
0.67 |
0.47 |
0.34 |
0.16 |
0.12 |
0.12 |
0.19 |
0.29 |
0.33 |
0.29 |
0.21 |
MJJ |
JAS14 |
SON |
NDJ |
JFM15 |
MAM |
MJJ |
JAS |
SON15 |
NDJ |
JFM16 |
One month ago
0.37 |
0.4 |
0.51 |
0.56 |
0.63 |
0.81 |
1.05 |
1.15 |
1.1 |
0.96 |
0.74 |
0.59 |
0.39 |
0.21 |
0.11 |
0.1 |
0.1 |
0.12 |
0.16 |
0.16 |
0.11 |
MJJ |
JAS14 |
SON |
NDJ |
JFM15 |
MAM |
MJJ |
JAS |
SON15 |
NDJ |
Two months ago:
0.13 |
0.16 |
0.3 |
0.5 |
0.48 |
0.51 |
0.64 |
0.82 |
0.89 |
0.83 |
0.7 |
0.55 |
0.46 |
0.25 |
0.13 |
0.04 |
0.1 |
0.08 |
0.04 |
0 |
-0.02 |
MAM |
MJJ |
JAS |
SON |
NDJ |
JFM |
MAM2015 |
MJJ |
JAS |
SON |
NDJ |
Three months ago:
-0.45 |
-0.4 |
-0.27 |
0.02 |
0.25 |
0.42 |
0.41 |
0.41 |
0.51 |
0.68 |
0.72 |
0.62 |
0.49 |
0.4 |
0.31 |
0.19 |
0.11 |
0.07 |
0.1 |
0.11 |
0.11 |
JFM14 |
MAM |
MJJ |
JAS |
SON14 |
NDJ |
JFM15 |
MAM |
MJJ |
JAS |
SON |
Four month ago:
-0.37 |
-0.37 |
-0.34 |
-0.25 |
-0.1 |
0.07 |
0.19 |
0.14 |
0.12 |
0.2 |
0.37 |
0.4 |
0.34 |
0.32 |
0.29 |
0.3 |
0.3 |
0.28 |
0.3 |
0.32 |
0.34 |
|
JFM14 |
MAM |
MJJ |
JAS |
SON14 |
NDJ |
JFM15 |
MAM |
MJJ |
JAS |
Anomalies relative to 1981-2010 climo.