pdo index update forwarded mike roberts hou ect 08 09 2000 03 18 pm nathan mantua 08 09 2000 03 10 00 pm undisclosed recipients cc bcc mike roberts hou ect subject pdo index update pdo index values updated july 2000 note january february 2000 values changed bit last update due changes reynolds optimally interpolated sst data pdo index calculated next update november year jan feb mar apr may jun jul 2000 1 99 0 82 0 29 0 35 0 05 0 43 0 66 full data series available via web url best wishes nate mantua pdo index updated standardized values pdo index derived leading pc monthly sst anomalies north pacific ocean poleward 20 n monthly mean global average sst anomalies removed separate pattern variability global warming signal may present data details see zhang j wallace battisti 1997 enso like interdecadal variability 1900 93 j climate 10 1004 1020 mantua n j r hare zhang j wallace r c francis 1997 pacific interdecadal climate oscillation impacts salmon production bulletin american meteorological society 78 pp 1069 1079 available via internet url data sources index ukmo historical sst data set 1900 81 reynold optimally interpolated sst january 1982 latest missing value flag 9999 year jan feb mar apr may jun jul aug sep oct nov dec 1900 0 04 1 32 0 49 0 35 0 77 0 65 0 95 0 14 0 24 0 23 0 44 1 19 1901 0 79 0 12 0 35 0 61 0 42 0 05 0 60 1 20 0 33 0 16 0 60 0 14 1902 0 82 1 58 0 48 1 37 1 09 0 52 1 58 1 57 0 44 0 70 0 16 1 10 1903 0 86 0 24 0 22 0 50 0 43 0 23 0 40 1 01 0 24 0 18 0 08 0 03 1904 0 63 0 91 0 71 0 07 0 22 1 53 1 58 0 64 0 06 0 43 1 45 0 06 1905 0 73 0 91 1 31 1 59 0 07 0 69 0 85 1 26 0 03 0 15 1 11 0 50 1906 0 92 1 18 0 83 0 74 0 44 1 24 0 09 0 53 0 31 0 08 1 69 0 54 1907 0 30 0 32 0 19 0 16 0 16 0 57 0 63 0 96 0 23 0 84 0 66 0 72 1908 1 36 1 02 0 67 0 23 0 23 0 41 0 60 1 04 0 16 0 41 0 47 1 16 1909 0 23 1 01 0 54 0 24 0 39 0 64 0 39 0 68 0 89 0 02 0 40 0 01 1910 0 25 0 70 0 18 0 37 0 06 0 28 0 03 0 06 0 40 0 66 0 02 0 84 1911 1 11 0 00 0 78 0 73 0 17 0 02 0 48 0 43 0 29 0 20 0 86 0 01 1912 1 72 0 23 0 04 0 38 0 02 0 77 1 07 0 84 0 94 0 56 0 74 0 98 1913 0 03 0 34 0 06 0 92 0 66 1 43 1 06 1 29 0 73 0 62 0 75 0 90 1914 0 34 0 29 0 08 1 20 0 11 0 11 0 21 0 11 0 34 0 11 0 03 0 89 1915 0 41 0 14 1 22 1 40 0 32 0 99 1 07 0 27 0 05 0 43 0 12 0 17 1916 0 64 0 19 0 11 0 35 0 42 0 82 0 78 0 73 0 77 0 22 0 68 1 94 1917 0 79 0 84 0 71 0 34 0 82 0 03 0 10 0 22 0 40 1 75 0 34 0 60 1918 1 13 0 66 1 15 0 32 0 33 0 07 0 98 0 31 0 59 0 61 0 34 0 86 1919 1 07 1 31 0 50 0 08 0 17 0 71 0 47 0 38 0 06 0 42 0 80 0 76 1920 1 18 0 06 0 78 1 29 0 97 1 30 0 90 2 21 1 28 1 06 0 26 0 29 1921 0 66 0 61 0 01 0 93 0 42 0 40 0 58 0 69 0 78 0 23 1 92 1 42 1922 1 05 0 85 0 08 0 43 0 19 1 04 0 82 0 93 0 81 0 84 0 60 0 48 1923 0 75 0 04 0 49 0 99 0 20 0 68 1 16 0 84 0 24 1 10 0 62 0 36 1924 1 29 0 73 1 13 0 02 0 36 0 75 0 55 0 67 0 48 1 25 0 24 0 11 1925 0 05 0 14 0 20 0 86 0 79 1 08 0 06 0 86 0 52 0 04 0 88 1 19 1926 0 30 0 98 0 50 2 10 1 43 2 03 1 05 1 64 1 18 1 65 1 00 1 06 1927 1 07 1 73 0 15 0 18 0 30 0 69 0 31 0 73 0 41 0 62 0 07 0 07 1928 0 96 0 79 0 52 0 81 0 66 0 15 0 30 0 72 1 41 1 31 0 14 0 98 1929 0 97 0 52 0 50 0 55 1 07 0 50 0 06 0 69 0 45 0 21 1 24 0 03 1930 0 97 1 06 0 43 0 70 0 06 0 58 0 45 0 53 0 20 0 38 0 31 1 20 1931 0 08 1 56 1 13 1 28 1 66 0 39 1 49 0 02 0 01 0 17 0 34 1 09 1932 0 26 0 58 0 51 1 15 0 64 0 10 0 12 0 14 0 40 0 29 0 88 0 02 1933 0 29 0 02 0 15 0 05 0 50 0 68 1 81 1 56 2 28 1 19 0 55 1 10 1934 0 17 0 68 1 34 1 63 1 23 0 51 0 44 1 54 1 25 2 10 1 63 1 67 1935 1 01 0 79 0 11 1 10 0 99 1 39 0 68 0 63 0 98 0 21 0 13 1 78 1936 1 79 1 75 1 36 1 32 1 83 2 37 2 57 1 71 0 04 2 10 2 65 1 28 1937 0 00 0 49 0 38 0 20 0 53 1 75 0 11 0 35 0 63 0 76 0 18 0 55 1938 0 50 0 02 0 24 0 27 0 25 0 20 0 21 0 45 0 01 0 07 0 48 1 40 1939 1 36 0 07 0 39 0 45 0 98 1 04 0 21 0 74 1 10 1 31 0 88 1 51 1940 2 03 1 74 1 89 2 37 2 32 2 43 2 12 1 40 1 10 1 19 0 68 1 96 1941 2 14 2 07 2 41 1 89 2 25 3 01 2 33 3 31 1 99 1 22 0 40 0 91 1942 1 01 0 79 0 29 0 79 0 84 1 19 0 12 0 44 0 68 0 54 0 10 1 00 1943 0 18 0 02 0 26 1 08 0 43 0 68 0 36 0 90 0 49 0 04 0 29 0 58 1944 0 18 0 17 0 08 0 72 0 35 0 98 0 40 0 51 0 56 0 40 0 33 0 20 1945 1 02 0 72 0 42 0 40 0 07 0 56 1 02 0 18 0 27 0 10 1 94 0 74 1946 0 91 0 32 0 41 0 78 0 50 0 86 0 84 0 36 0 22 0 36 1 48 0 96 1947 0 73 0 29 1 17 0 70 0 37 1 36 0 16 0 30 0 58 0 85 0 14 1 67 1948 0 11 0 74 0 03 1 33 0 23 0 08 0 92 1 56 1 74 1 32 0 89 1 70 1949 2 01 3 60 1 00 0 53 1 07 0 70 0 56 1 30 0 93 1 41 0 83 0 80 1950 2 13 2 91 1 13 1 20 2 23 1 77 2 93 0 70 2 14 1 36 2 46 0 76 1951 1 54 1 06 1 90 0 36 0 25 1 09 0 70 1 37 0 08 0 32 0 28 1 68 1952 2 01 0 46 0 63 1 05 1 00 1 43 1 25 0 60 0 89 0 35 0 76 0 04 1953 0 57 0 07 1 12 0 05 0 43 0 29 0 74 0 05 0 63 1 09 0 03 0 07 1954 1 32 1 61 0 52 1 33 0 01 0 97 0 43 0 08 0 94 0 52 0 72 0 50 1955 0 20 1 52 1 26 1 97 1 21 2 44 2 35 2 25 1 95 2 80 3 08 2 75 1956 2 48 2 74 2 56 2 17 1 41 1 70 1 03 1 16 0 71 2 30 2 11 1 28 1957 1 82 0 68 0 03 0 58 0 57 1 76 0 72 0 51 1 59 1 50 0 32 0 55 1958 0 25 0 62 0 25 1 06 1 28 1 33 0 89 1 06 0 29 0 01 0 18 0 86 1959 0 69 0 43 0 95 0 02 0 23 0 44 0 50 0 62 0 85 0 52 1 11 0 06 1960 0 30 0 52 0 21 0 09 0 91 0 64 0 27 0 38 0 94 0 09 0 23 0 17 1961 1 18 0 43 0 09 0 34 0 06 0 61 1 22 1 13 2 01 2 28 1 85 2 69 1962 1 29 1 15 1 42 0 80 1 22 1 62 1 46 0 48 1 58 1 55 0 37 0 96 1963 0 33 0 16 0 54 0 41 0 65 0 88 1 00 1 03 0 45 0 52 2 08 1 08 1964 0 01 0 21 0 87 1 03 1 91 0 32 0 51 1 03 0 68 0 37 0 80 1 52 1965 1 24 1 16 0 04 0 62 0 66 0 80 0 47 0 20 0 59 0 36 0 59 0 06 1966 0 82 0 03 1 29 0 06 0 53 0 16 0 26 0 35 0 33 1 17 1 15 0 32 1967 0 20 0 18 1 20 0 89 1 24 1 16 0 89 1 24 0 72 0 64 0 05 0 40 1968 0 95 0 40 0 31 1 03 0 53 0 35 0 53 0 19 0 06 0 34 0 44 1 27 1969 1 26 0 95 0 50 0 44 0 20 0 89 0 10 0 81 0 66 1 12 0 15 1 38 1970 0 61 0 43 1 33 0 43 0 49 0 06 0 68 1 63 1 67 1 39 0 80 0 97 1971 1 90 1 74 1 68 1 59 1 55 1 55 2 20 0 15 0 21 0 22 1 25 1 87 1972 1 99 1 83 2 09 1 65 1 57 1 87 0 83 0 25 0 17 0 11 0 57 0 33 1973 0 46 0 61 0 50 0 69 0 76 0 97 0 57 1 14 0 51 0 87 1 81 0 76 1974 1 22 1 65 0 90 0 52 0 28 0 31 0 08 0 27 0 44 0 10 0 43 0 12 1975 0 84 0 71 0 51 1 30 1 02 1 16 0 40 1 07 1 23 1 29 2 08 1 61 1976 1 14 1 85 0 96 0 89 0 68 0 67 0 61 1 28 0 82 1 11 1 25 1 22 1977 1 65 1 11 0 72 0 30 0 31 0 42 0 19 0 64 0 55 0 61 0 72 0 69 1978 0 34 1 45 1 34 1 29 0 90 0 15 1 24 0 56 0 44 0 10 0 07 0 43 1979 0 58 1 33 0 30 0 89 1 09 0 17 0 84 0 52 1 00 1 06 0 48 0 42 1980 0 11 1 32 1 09 1 49 1 20 0 22 0 23 0 51 0 10 1 35 0 37 0 10 1981 0 59 1 46 0 99 1 45 1 75 1 69 0 84 0 18 0 42 0 18 0 80 0 67 1982 0 34 0 20 0 19 0 19 0 58 0 78 0 58 0 39 0 84 0 37 0 25 0 26 1983 0 56 1 14 2 11 1 87 1 80 2 36 3 51 1 85 0 91 0 96 1 02 1 69 1984 1 50 1 21 1 77 1 52 1 30 0 18 0 18 0 03 0 67 0 58 0 71 0 82 1985 1 27 0 94 0 57 0 19 0 00 0 18 1 07 0 81 0 44 0 29 0 75 0 38 1986 1 12 1 61 2 18 1 55 1 16 0 89 1 38 0 22 0 22 1 00 1 77 1 77 1987 1 88 1 75 2 10 2 16 1 85 0 73 2 01 2 83 2 44 1 36 1 47 1 27 1988 0 93 1 24 1 42 0 94 1 20 0 74 0 64 0 19 0 37 0 10 0 02 0 43 1989 0 95 1 02 0 83 0 32 0 47 0 36 0 83 0 09 0 05 0 12 0 50 0 21 1990 0 30 0 65 0 62 0 27 0 44 0 44 0 27 0 11 0 38 0 69 1 69 2 23 1991 2 02 1 19 0 74 1 01 0 51 1 47 0 10 0 36 0 65 0 49 0 42 0 09 1992 0 05 0 31 0 67 0 75 1 54 1 26 1 90 1 44 0 83 0 93 0 93 0 53 1993 0 05 0 19 0 76 1 21 2 13 2 34 2 35 2 69 1 56 1 41 1 24 1 07 1994 1 21 0 59 0 80 1 05 1 23 0 46 0 06 0 79 1 36 1 32 1 96 1 79 1995 0 49 0 46 0 75 0 83 1 46 1 27 1 71 0 21 1 16 0 47 0 28 0 16 1996 0 59 0 75 1 01 1 46 2 18 1 10 0 77 0 14 0 24 0 33 0 09 0 03 1997 0 23 0 28 0 65 1 05 1 83 2 76 2 35 2 79 2 19 1 61 1 12 0 67 1998 0 83 1 56 2 01 1 27 0 70 0 40 0 04 0 22 1 21 1 39 0 52 0 44 1999 0 32 0 66 0 33 0 41 0 68 1 30 0 66 0 96 1 53 2 23 2 05 1 63 2000 1 99 0 82 0 29 0 35 0 05 0 43 0 66 999 999 999 999 999 note monthly values last year data set subject minor changes due updated values reynold optimally interpolated sst data used creating index url ftp ftp atmos washington edu mantua pnw _ impacts indices pdo latest questions time series contact nathan mantua mantua atmos washington edu pdo _ latest gif