(EASTER+RAPA)SEA LEVEL PRESS (1000 MB SUBTRACTED) ORIGINAL DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1951 17.3 16.7 16.4 15.8 13.9 16.9 16.5 16.4 17.4 19.8 20.6 18.8 1952 16.3 16.9 18.1 15.8 17.4 19.5 20.9 19.1 16.4 20.2 18.7 15.7 1953 18.1 15.0 17.5 16.3 16.7 18.8 19.0 16.2 20.8 23.8 21.5 18.3 1954 18.0 19.8 16.4 16.9 19.8 18.8 22.4 19.8 23.6 23.9 20.8 21.2 1955 17.6 19.1 19.0 18.8 19.6 20.0 20.8 21.3 24.4 22.9 18.7 20.7 1956 17.9 19.4 19.1 18.8 20.2 18.5 18.0 18.8 19.5 21.4 17.3 14.7 1957 15.1 15.8 16.0 17.1 14.2 16.6 17.5 19.0 19.3 20.3 17.5 18.1 1958 16.3 18.4 18.2 15.3 15.4 18.6 14.1 21.0 18.1 18.9 19.4 16.6 1959 17.8 16.9 16.8 17.8 14.0 20.1 18.3 21.4 19.7 20.2 19.6 17.6 1960 16.4 16.6 15.6 16.9 18.1 16.2 20.7 20.7 21.8 21.5 19.0 16.5 1961 17.6 19.7 17.2 18.3 14.4 17.2 15.8 17.6 21.4 19.6 20.3 17.9 1962 18.1 15.3 17.5 19.5 19.1 17.7 19.0 22.0 21.4 22.0 16.3 18.3 1963 19.7 20.0 18.6 15.9 15.7 17.6 20.6 17.8 18.1 18.0 20.6 17.2 1964 17.7 17.4 19.6 18.7 15.7 20.3 18.8 22.3 21.0 18.5 16.3 17.2 1965 15.1 16.4 15.1 17.0 16.5 16.6 15.5 18.6 18.6 21.6 16.8 17.5 1966 16.0 19.4 17.4 16.0 14.6 21.5 16.8 20.5 20.4 19.9 17.9 18.2 1967 17.2 20.1 18.7 16.8 17.5 21.9 22.3 22.7 22.8 20.3 18.6 16.3 1968 16.7 16.4 19.5 16.7 17.3 20.2 20.8 16.6 16.8 19.8 17.6 16.8 1969 13.3 17.3 18.2 17.0 14.9 18.5 16.4 20.9 19.3 19.6 20.9 17.4 1970 18.5 16.4 16.8 16.5 20.8 20.8 20.8 20.6 21.8 20.9 20.6 20.0 1971 17.2 18.9 18.8 18.9 19.5 21.4 16.0 22.6 22.3 20.4 18.1 17.0 1972 14.3 16.3 17.3 17.2 13.8 13.0 16.1 16.8 18.5 20.1 20.1 16.4 1973 19.2 18.2 18.1 16.2 16.7 20.4 19.4 22.6 23.4 22.8 19.7 20.5 1974 20.2 19.7 19.2 16.9 17.4 19.5 20.7 17.7 21.6 21.1 19.4 15.6 1975 15.3 15.4 18.8 16.1 17.3 17.8 20.6 22.9 23.4 22.6 19.2 19.1 1976 18.1 19.4 17.3 15.9 15.1 16.6 15.1 18.0 15.1 16.5 17.7 13.9 1977 14.2 18.3 14.6 15.2 14.8 16.7 20.1 19.3 15.8 18.2 18.8 16.9 1978 18.7 15.1 18.2 16.0 17.7 17.5 16.8 20.4 20.5 15.8 18.6 17.8 1979 15.3 18.4 16.5 13.9 15.8 20.0 15.7 15.2 20.6 20.3 16.4 17.2 1980 17.6 16.8 15.0 16.0 17.7 17.2 17.1 19.9 19.1 21.3 18.3 15.5 1981 18.6 18.7 15.5 16.3 16.4 18.7 18.4 18.1 17.7 18.7 19.6 18.7 1982 18.4 18.1 17.7 13.8 16.8 16.3 16.5 15.4 17.1 16.8 16.1 15.0 1983 12.6 14.1 16.8 17.2 18.9 17.2 19.1 20.6 22.1 20.7 20.4 16.7 1984 15.6 16.4 16.9 15.6 17.5 17.6 19.3 18.9 17.2 18.7 19.6 17.6 1985 17.6 18.5 16.4 17.6 15.6 15.7 18.5 22.7 19.9 18.5 18.3 17.5 1986 18.2 16.1 18.1 17.0 15.3 16.7 15.2 16.6 17.1 18.9 17.8 17.7 1987 17.6 14.2 14.6 17.4 17.7 15.0 14.0 17.5 16.6 20.0 18.3 17.8 1988 18.8 15.6 15.8 17.1 18.1 20.5 21.1 21.5 24.6 21.0 20.2 18.1 1989 18.0 17.8 17.7 17.1 16.3 19.5 18.8 17.8 20.2 21.3 17.7 17.1 1990 19.9 15.4 16.7 16.3 19.6 15.8 18.5 16.6 18.5 21.8 19.6 17.7 1991 17.8 17.5 13.9 15.4 12.8 14.4 19.4 22.1 16.8 17.8 18.6 15.2 1992 17.3 17.8 14.5 16.8 17.7 16.5 20.1 18.8 18.6 19.1 16.2 16.8 1993 15.2 14.1 15.7 15.3 18.5 18.9 19.3 17.7 19.4 17.9 20.7 18.0 1994 16.5 18.6 15.0 15.7 16.5 18.0 17.2 21.1 15.3 18.5 20.0 17.3 1995 17.9 17.3 16.8 16.5 17.5 16.9 18.8 21.5 21.8 19.4 21.1 15.6 (EASTER+RAPA)SEA LEVEL PRESS ANOMALY YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1951 0.3 -0.9 -1.1 -1.0 -2.8 -1.6 -1.9 -3.2 -2.7 -0.6 1.8 1.3 1952 -0.7 -0.7 0.6 -1.0 0.7 1.0 2.5 -0.5 -3.7 -0.2 -0.2 -1.8 1953 1.1 -2.7 0.0 -0.5 0.0 0.3 0.6 -3.4 0.7 3.4 2.7 0.8 1954 1.0 2.1 -1.1 0.1 3.1 0.2 4.0 0.2 3.5 3.5 2.0 3.7 1955 0.6 1.4 1.5 2.0 2.9 1.5 2.4 1.7 4.3 2.5 -0.2 3.2 1956 0.9 1.8 1.6 2.0 3.5 -0.1 -0.4 -0.8 -0.6 1.0 -1.6 -2.8 1957 -2.0 -1.8 -1.5 0.3 -2.5 -2.0 -0.9 -0.6 -0.8 -0.1 -1.3 0.6 1958 -0.7 0.8 0.7 -1.6 -1.3 0.0 -4.3 1.4 -2.0 -1.5 0.6 -0.9 1959 0.8 -0.7 -0.7 1.0 -2.7 1.6 -0.1 1.8 -0.4 -0.2 0.8 0.1 1960 -0.7 -1.1 -1.9 0.1 1.4 -2.3 2.3 1.1 1.7 1.1 0.2 -1.0 1961 0.5 2.1 -0.3 1.5 -2.3 -1.4 -2.6 -2.0 1.3 -0.8 1.4 0.4 1962 1.0 -2.3 0.0 2.7 2.4 -0.9 0.6 2.4 1.3 1.6 -2.5 0.7 1963 2.6 2.4 1.1 -0.9 -1.0 -1.0 2.2 -1.8 -2.0 -2.4 1.8 -0.3 1964 0.7 -0.2 2.1 1.9 -1.0 1.8 0.4 2.7 0.9 -1.9 -2.6 -0.3 1965 -1.9 -1.3 -2.4 0.2 -0.2 -1.9 -2.9 -1.0 -1.5 1.2 -2.1 0.0 1966 -1.0 1.8 -0.1 -0.8 -2.1 3.0 -1.6 0.9 0.3 -0.5 -0.9 0.7 1967 0.1 2.4 1.2 0.0 0.8 3.3 3.9 3.1 2.7 -0.1 -0.2 -1.2 1968 -0.4 -1.3 2.0 -0.1 0.6 1.6 2.4 -3.0 -3.3 -0.6 -1.3 -0.7 1969 -3.8 -0.3 0.7 0.2 -1.8 0.0 -2.0 1.3 -0.8 -0.8 2.1 -0.1 1970 1.4 -1.2 -0.7 -0.3 4.1 2.2 2.4 1.0 1.6 0.5 1.7 2.5 1971 0.2 1.3 1.3 2.1 2.8 2.8 -2.4 3.0 2.2 0.0 -0.8 -0.5 1972 -2.7 -1.3 -0.2 0.4 -2.9 -5.5 -2.3 -2.8 -1.6 -0.3 1.3 -1.1 1973 2.1 0.5 0.6 -0.6 0.0 1.9 1.0 3.0 3.3 2.3 0.8 3.0 1974 3.2 2.0 1.7 0.1 0.7 0.9 2.3 -1.9 1.5 0.7 0.5 -1.9 1975 -1.8 -2.2 1.3 -0.7 0.6 -0.7 2.2 3.3 3.3 2.2 0.4 1.6 1976 1.0 1.8 -0.2 -0.9 -1.6 -2.0 -3.3 -1.6 -5.0 -3.9 -1.1 -3.6 1977 -2.8 0.6 -2.9 -1.6 -1.9 -1.9 1.7 -0.3 -4.3 -2.2 -0.1 -0.6 1978 1.7 -2.6 0.7 -0.8 1.0 -1.0 -1.6 0.8 0.4 -4.6 -0.2 0.3 1979 -1.8 0.7 -1.0 -2.9 -0.9 1.4 -2.7 -4.4 0.5 -0.1 -2.5 -0.3 1980 0.6 -0.8 -2.5 -0.8 1.0 -1.4 -1.3 0.3 -1.0 0.9 -0.5 -2.0 1981 1.6 1.0 -2.0 -0.5 -0.3 0.2 0.0 -1.5 -2.4 -1.7 0.8 1.2 1982 1.3 0.5 0.2 -3.0 0.1 -2.2 -1.9 -4.2 -3.0 -3.6 -2.8 -2.5 1983 -4.5 -3.5 -0.7 0.4 2.2 -1.4 0.7 1.0 2.0 0.3 1.6 -0.8 1984 -1.5 -1.3 -0.6 -1.2 0.8 -0.9 0.8 -0.7 -2.9 -1.7 0.8 0.1 1985 0.5 0.8 -1.1 0.8 -1.1 -2.9 0.1 3.1 -0.2 -1.9 -0.5 0.0 1986 1.1 -1.5 0.6 0.2 -1.4 -1.9 -3.2 -3.0 -3.0 -1.5 -1.0 0.2 1987 0.5 -3.5 -2.9 0.6 1.0 -3.6 -4.4 -2.1 -3.5 -0.4 -0.6 0.3 1988 1.7 -2.0 -1.7 0.3 1.4 2.0 2.7 1.9 4.5 0.6 1.3 0.6 1989 1.0 0.1 0.2 0.3 -0.5 1.0 0.4 -1.8 0.1 0.9 -1.2 -0.4 1990 2.8 -2.3 -0.8 -0.5 2.9 -2.7 0.1 -3.0 -1.6 1.4 0.8 0.2 1991 0.7 -0.1 -3.6 -1.4 -3.9 -4.2 1.0 2.5 -3.3 -2.6 -0.2 -2.3 1992 0.2 0.1 -3.0 0.0 1.0 -2.0 1.7 -0.8 -1.5 -1.3 -2.7 -0.7 1993 -1.8 -3.5 -1.8 -1.5 1.8 0.3 0.9 -1.9 -0.7 -2.5 1.8 0.5 1994 -0.6 1.0 -2.5 -1.1 -0.2 -0.6 -1.2 1.5 -4.8 -1.9 1.1 -0.2 1995 0.9 -0.3 -0.7 -0.3 0.8 -1.7 0.4 1.9 1.7 -1.0 2.2 -1.9 (EASTER+RAPA)SEA LEVEL PRESS STANDARDIZED DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1951 0.2 -0.5 -0.6 -0.5 -1.5 -0.9 -1.0 -1.8 -1.5 -0.3 1.0 0.7 1952 -0.4 -0.4 0.3 -0.5 0.4 0.5 1.4 -0.3 -2.0 -0.1 -0.1 -1.0 1953 0.6 -1.5 0.0 -0.3 0.0 0.2 0.3 -1.9 0.4 1.9 1.5 0.5 1954 0.5 1.2 -0.6 0.1 1.7 0.1 2.2 0.1 1.9 1.9 1.1 2.0 1955 0.3 0.8 0.8 1.1 1.6 0.8 1.3 0.9 2.3 1.3 -0.1 1.8 1956 0.5 1.0 0.9 1.1 1.9 0.0 -0.2 -0.5 -0.3 0.5 -0.9 -1.5 1957 -1.1 -1.0 -0.8 0.1 -1.4 -1.1 -0.5 -0.4 -0.4 -0.1 -0.7 0.3 1958 -0.4 0.4 0.4 -0.9 -0.7 0.0 -2.3 0.7 -1.1 -0.8 0.3 -0.5 1959 0.4 -0.4 -0.4 0.5 -1.5 0.9 -0.1 1.0 -0.2 -0.1 0.4 0.1 1960 -0.4 -0.6 -1.1 0.1 0.7 -1.3 1.3 0.6 0.9 0.6 0.1 -0.5 1961 0.3 1.1 -0.2 0.8 -1.3 -0.7 -1.4 -1.1 0.7 -0.4 0.8 0.2 1962 0.6 -1.3 0.0 1.5 1.3 -0.5 0.3 1.3 0.7 0.9 -1.4 0.4 1963 1.4 1.3 0.6 -0.5 -0.5 -0.5 1.2 -1.0 -1.1 -1.3 1.0 -0.1 1964 0.4 -0.1 1.2 1.0 -0.6 1.0 0.2 1.5 0.5 -1.1 -1.4 -0.2 1965 -1.0 -0.7 -1.3 0.1 -0.1 -1.0 -1.6 -0.5 -0.8 0.7 -1.1 0.0 1966 -0.5 1.0 -0.1 -0.5 -1.1 1.6 -0.9 0.5 0.2 -0.3 -0.5 0.4 1967 0.1 1.3 0.7 0.0 0.4 1.8 2.1 1.7 1.5 0.0 -0.1 -0.6 1968 -0.2 -0.7 1.1 -0.1 0.3 0.9 1.3 -1.7 -1.8 -0.3 -0.7 -0.4 1969 -2.1 -0.2 0.4 0.1 -1.0 0.0 -1.1 0.7 -0.4 -0.4 1.1 0.0 1970 0.8 -0.7 -0.4 -0.2 2.2 1.2 1.3 0.5 0.9 0.3 0.9 1.4 1971 0.1 0.7 0.7 1.1 1.5 1.5 -1.3 1.6 1.2 0.0 -0.4 -0.3 1972 -1.5 -0.7 -0.1 0.2 -1.6 -3.0 -1.3 -1.6 -0.9 -0.2 0.7 -0.6 1973 1.2 0.3 0.3 -0.3 0.0 1.0 0.5 1.6 1.8 1.3 0.5 1.7 1974 1.7 1.1 0.9 0.1 0.4 0.5 1.2 -1.1 0.8 0.4 0.3 -1.1 1975 -1.0 -1.2 0.7 -0.4 0.3 -0.4 1.2 1.8 1.8 1.2 0.2 0.9 1976 0.6 1.0 -0.1 -0.5 -0.9 -1.1 -1.8 -0.9 -2.7 -2.1 -0.6 -2.0 1977 -1.5 0.3 -1.6 -0.9 -1.0 -1.0 0.9 -0.2 -2.3 -1.2 0.0 -0.3 1978 0.9 -1.4 0.4 -0.4 0.5 -0.6 -0.9 0.4 0.2 -2.5 -0.1 0.2 1979 -1.0 0.4 -0.6 -1.6 -0.5 0.8 -1.5 -2.4 0.3 -0.1 -1.4 -0.2 1980 0.3 -0.5 -1.4 -0.5 0.5 -0.7 -0.7 0.2 -0.6 0.5 -0.3 -1.1 1981 0.9 0.6 -1.1 -0.3 -0.2 0.1 0.0 -0.8 -1.3 -0.9 0.4 0.7 1982 0.7 0.3 0.1 -1.6 0.0 -1.2 -1.1 -2.3 -1.6 -2.0 -1.5 -1.4 1983 -2.4 -1.9 -0.4 0.2 1.2 -0.7 0.4 0.5 1.1 0.1 0.9 -0.4 1984 -0.8 -0.7 -0.3 -0.7 0.4 -0.5 0.4 -0.4 -1.6 -0.9 0.4 0.0 1985 0.3 0.4 -0.6 0.4 -0.6 -1.6 0.1 1.7 -0.1 -1.1 -0.3 0.0 1986 0.6 -0.8 0.3 0.1 -0.8 -1.0 -1.8 -1.7 -1.6 -0.8 -0.6 0.1 1987 0.3 -1.9 -1.6 0.3 0.5 -1.9 -2.4 -1.2 -1.9 -0.2 -0.3 0.2 1988 1.0 -1.1 -0.9 0.1 0.8 1.1 1.4 1.0 2.5 0.3 0.7 0.3 1989 0.5 0.0 0.1 0.2 -0.3 0.5 0.2 -1.0 0.0 0.5 -0.6 -0.2 1990 1.6 -1.2 -0.4 -0.3 1.6 -1.5 0.1 -1.7 -0.9 0.8 0.4 0.1 1991 0.4 -0.1 -2.0 -0.8 -2.2 -2.3 0.5 1.4 -1.8 -1.4 -0.1 -1.3 1992 0.1 0.1 -1.6 0.0 0.5 -1.1 0.9 -0.5 -0.8 -0.7 -1.5 -0.4 1993 -1.0 -1.9 -1.0 -0.8 1.0 0.2 0.5 -1.0 -0.4 -1.4 1.0 0.3 1994 -0.3 0.5 -1.4 -0.6 -0.1 -0.3 -0.7 0.8 -2.6 -1.1 0.6 -0.1 1995 0.5 -0.2 -0.4 -0.2 0.4 -0.9 0.2 1.0 0.9 -0.6 1.2 -1.0