Cold tongue index sea surface temperature anomalies (0.01C).
Average sea surface temperatures anomalies over 6N-6S, 180-90W
minus the global mean sea surface temperature anomaly.
jan feb mar apr may jun jul aug sep oct nov dec
1950 -120 -129 -44 -66 -80 -55 -100 -53 -94 -93 -105 -35
1951 -42 -43 -26 57 55 2 141 115 60 110 149 103
1952 60 21 -10 35 -11 -47 -43 -47 -30 -35 -38 -32
1953 36 38 44 95 62 52 49 13 74 22 41 9
1954 -15 -2 14 -91 -100 -107 -104 -102 -109 -111 -87 -92
1955 -31 14 -47 -37 -98 -92 -96 -71 -124 -138 -184 -148
1956 -115 -54 -40 -10 -29 -11 -24 -53 -62 -48 -74 -62
1957 -59 -3 39 66 96 120 148 114 95 79 116 122
1958 131 114 86 37 22 40 33 19 -34 -1 1 -2
1959 -1 6 42 46 15 -17 -25 -26 -34 37 2 4
1960 -2 -9 17 11 -2 -21 -24 -17 6 -33 -59 -32
1961 -13 49 10 5 -14 18 -54 -56 -93 -107 -34 -35
1962 -21 5 -27 -84 -55 -25 -41 -29 -49 -44 -62 -82
1963 -46 -35 5 7 2 18 60 66 58 59 72 79
1964 63 15 -16 -62 -109 -109 -46 -64 -50 -54 -66 -83
1965 -15 12 33 54 108 132 129 155 135 151 152 136
1966 122 76 36 3 -24 -18 11 -10 -36 -6 -55 -57
1967 -45 -19 -24 -22 9 28 -20 -98 -94 -74 -61 -55
1968 -75 -83 -82 -41 -51 -6 28 50 32 40 53 71
1969 68 37 40 52 99 69 27 62 58 88 84 107
1970 63 19 -16 7 -34 -70 -118 -93 -81 -66 -108 -74
1971 -117 -84 -59 -39 -40 -40 -40 -70 -54 -68 -68 -84
1972 -19 -11 10 60 81 104 156 175 145 183 187 206
1973 158 45 18 -44 -61 -75 -115 -114 -98 -88 -95 -113
1974 -111 -66 -47 -12 -8 8 -3 -2 -16 -58 -59 -72
1975 -26 -38 -20 8 -33 -74 -64 -61 -82 -82 -85 -126
1976 -105 -32 -11 4 42 100 97 131 99 113 101 61
1977 92 54 46 -21 -11 -4 12 -9 -1 34 31 56
1978 50 38 -3 -38 -44 -52 -44 -65 -30 3 0 28
1979 -21 6 10 25 32 32 0 17 50 49 53 31
1980 31 7 18 20 35 44 -1 -10 10 -12 26 35
1981 -66 -57 -23 -35 -13 -5 -39 -53 -2 -17 -36 19
1982 26 -8 10 31 67 97 76 101 161 178 237 264
1983 222 166 145 137 191 157 109 83 67 -15 -46 -54
1984 -33 -27 16 -30 -54 -102 -32 -23 -21 -78 -48 -82
1985 -84 -74 -80 -57 -79 -47 -52 -36 -64 -45 -53 -47
1986 -56 -15 -13 -20 -30 -28 18 17 25 12 88 78
1987 118 113 103 109 115 111 123 129 142 118 95 88
1988 32 11 -8 -44 -123 -161 -134 -99 -68 -108 -112 -114
1989 -81 -53 -88 -65 -37 -20 -62 -36 -28 -24 -35 -33
1990 -20 10 5 -16 23 -5 -2 18 3 11 -11 -20
1991 14 -2 0 -1 43 74 61 48 33 91 103 128
1992 143 133 104 109 106 43 35 7 5 -15 -5 4
1993 7 27 48 86 95 87 66 55 65 73 61 39
1994 19 -5 -6 -9 10 27 10 34 50 84 105 90
1995 75 61 8 -15 -32 -12 -22 -50 -63 -70 -86 -77
1996 -60 -75 -54 -62 -45 -42 -23 -30 -40 -36 -40 -65
1997 -44 -31 -13 35 85 110 159 187 203 214 244 236
1998 184 146 98 56 42 -76 -131 -100 -104 -155 -147 -182
1999 -182 -144 -89 -95 -78 -85 -85 -112 -80 -103 -133 -159
2000 -160 -144 -124 -75 -70 -61 -59 -53 -54 -73 -88 -102
2001 -89 -82 -66 -44 -42 -17 -9 -13 -15 -28 -48 -55
2002 -22 -9 -9 11 25 50 57 67 100 96 118 103
2003 89 65 36 -11 -56 -32 -16 -29 -4 11 18 26
2004 30 13 -21 -14 1 -3 28 37 55 53 58 54
2005 61 33 22 -2 3 -6 -7 -15 -16 -21 -68