Tahiti Sea-Level Pressure Anomalies

Tahiti (18S, 150W) Sea Level Pressure

The NCEP Climate Prediction Center, University of East Anglia, and the NCAR Climate and Global Dynamics Division all provide a Tahiti SLP time series which begins in the 1800s and is updated monthly. In the following I use the UEA data.

Analysis | Data

Typical anomaliy magnitudes of 0.2-0.5 mb

PostScript | JPEG Successive 5- and 3-year running means are applied to the anomaly time series to retain only periods longer than 5 years. The first and last 30 months of the filtered series are not plotted. The filtered series exhibits above normal SLP from the 1870s to the mid-1930s, and below normal SLP from the mid-1930s to the present.

Data

table with values in tenths mb (-989 and -10 for missing).

3 columns: years, months, Tahiti SLP (mb) with NaN for missing data.

a single column
The data is the same in all three formats.

The following SLP anomalies (in tenths mb, for example, -9 is -0.9mb) are with respect to 1950-79. Monthly SLP anomalies exhibit significant month to month variability, but I have not filtered the following values.

       jan  feb  mar  apr  may  jun  jul  aug  sep  oct  nov  dec
 1855                            -9   -9   -2    8    0    6   16
 1856  -11   -1    8   11   15    5    7   18   14   -2   16   12
 1857   24   14   11   17   10  -13    1    7   10   15   22    9
 1858    9    8  -19    3   -2    5   10   -8   -3   13   17   28
 1859       -28  -21   -9   -4  -25   -9   -6   -6   -4   -4  -10
 1860    5  -20  -15  -44   -5    7                              
 1861   16    4   -1   -1    8    8    4    1    5   14    6   13
 1862   22    7   -4    0    1   -5   14   10    9    9    2  -18
 1863   -4  -14  -14   -1    4    7    7    6   -8   -5   -9   -5
 1864    1  -18  -14  -12    0  -20   -1    1    1    9    2   11
 1865  -11    7   14    9   -3  -13    0   16   -5   -3   -4  -12
 1866   -2   -4   -3   -4   -1   -2   -5    9   -5    1   15    2
 1867   15   -1   10   10    4   -5    4    2   -5  -16    5  -10
 1868   -6   -3  -18    9   -4  -10   -3  -13  -16  -12   -7   13
 1869  -23    3   12   -1    4    2   16   -1   -3    0    0   -5
 1870   -4   -8    1    9    5   -3   -1    3   -3   -5   -7   -7
 1871  -16    3  -14   -3   -3    2    4    6    6   -6   -5   16
 1872   22    9    8   13    9    2   14    2   33   14   31   22
 1873   23   30   37   27   28    8    4    1   -6  -22   -4    0
 1874   15   10   10    9    9  -10   -1   14   23   15    7   -2
 1875   11   -3    4   13    6   12  -10   -1   -1  -11  -20  -15
 1876    8    9  -14   -1    8   16    4   18   13  -11   -8    7
 1877  -12  -18  -20  -25  -17  -20    2   -3  -11   -8   -6  -13
 1878  -14  -19  -24   -8   -1   -6   11   22   11    2   15   11
 1879   14   16   16   14   -1   13   20   22   22   16    2  -18
 1880    2   17   15   12    9    9   13   23   18   16   19    3
 1881  -10   -6   17   19   -6   -7    4   -6  -12  -20   -1    4
 1882  -14   -6    5   -8   -6  -19  -31  -37  -27  -11    9    2
 1883   23  -18  -34    8   13    3  -17   -9  -16    1  -11  -37
 1884  -16   -4   13   -1    4   10   -3  -12  -10    7   -1  -26
 1885  -24    0   16   10   14   -9    4  -12    5  -12   -2    6
 1886   13   -7   12    2    3    2   -1    4   10   12    7   -3
 1887   19    3   11    2   -7    5   12    3   10   12   -3   16
 1888  -16   -1   -2  -18  -10  -14  -17   -8  -11  -10  -11    8
 1889  -27   14  -28    6    0   13    1    3    6    0    2   12
 1890   20   20   16    2    3   -4   -9  -12    0   -4    5    0
 1891   23   -7   -5   12   12    4    2    6    1    8    4    4
 1892    6   -8    3   12   21   16   13    2   -8    0  -18    3
 1893   13    6   18   11   21   15   20   15   16    0   12   -4
 1894   13   16   12   11   -3    4   15  -24   -2    6  -10    6
 1895    2   18    5   18   16   -8  -13  -18  -11  -10   10  -13
 1896    0    4  -12  -14  -14  -22  -17  -15  -17  -10   -7   -8
 1897  -12   -9  -11   -8   -6   -1    5    4   -2    3  -11    2
 1898   12   -3   -3   10    3   -7   11    9    3   -4  -16   -5
 1899   18   23    8    2   -4   -7   -4  -16    2   21   32    0
 1900   -1    0  -27   -9   -4   25    7   -5  -33  -31   -8   -1
 1901    0    7   14    9    5   20   24   18  -18  -39   -5   -4
 1902   30    9   24   17   29    9   11   -8  -15    2   13    4
 1903   -2   -4   12   18   12    2   -6    0    6    1   -3   10
 1904   24   21   10   19   10   -3  -12    4    2   -8  -14    8
 1905   -5  -25  -26  -18  -16  -18  -24   -6  -13  -15   -9  -16
 1906   -7  -12    0   -5   -9   -9   -1   20   15    5   14    0
 1907   -1   -8    0   -5   -2   -4   -6  -14    1   -7   -8   -4
 1908   -3    7  -12   -1    4   -2   20    1   28    7   -1  -15
 1909  -11    4  -21  -14   -2   17    8    5   -7   -6    5    2
 1910   -8   16   13   -7    3   13   20    5   10   14   11   14
 1911   -3   -6    6   -7   -1   -2  -15  -13  -13   -8   -3   -3
 1912   -9  -13  -14   -5   -1   -9  -12   -9  -15   -9    2   -6
 1913  -10   -7   -8   -7    5    1    6  -12   -4   -4   -6   -8
 1914   10   22   14  -13  -11  -16   -4   -4  -10   13   10   15
 1915  -31    0  -12    0   20   21   27   18    8    7  -27   -2
 1916   -1  -14  -15    3   -3  -10   21   18   -5   -7    3   -4
 1917    8   29   13   17   23   12   21   33   34   15   17   20
 1918   21   22    6   17   11   -7  -13   -1    8   -4    3  -10
 1919  -24   -3  -17   -3  -11  -10  -12   -5   -5  -13   -9  -12
 1920   -9   -3    2   -6   -5  -16   -4   -2    0  -13   -5   -2
 1921   10   11   10   -6   -5   22   -4   -8    7   13   11    2
 1922    7    3    0   -6  -11   -4   -2   -2    3    7   11    9
 1923   -1    6    2   -3   -5  -10   -9  -12  -20   -3  -14    0
 1924    0    3    1  -18   10    6   13   16   12    0    9   -7
 1925    2    3    0    1   -6  -10  -12  -17   -2  -14   -2   -8
 1926  -11  -13   -8   -1   -1   -6   -3  -12   -3   -3    7    1
 1927   -2    3   23    2    6    4   -3   -6    4   -3   -7   11
 1928    0   13   11   11    6   -7   -2   18   12    2    9   12
 1929    0   15    6    6   -6   10   11    3    4   13    8    0
 1930   10   13    6    3   12   -4   -2    3    0   17   21    0
 1931   15  -14   17   11   22   22   16  -10   -2   -7   -5    9
 1932   -5    2  -10  -20    3   -2  -19   -5  -20  -13   -6   -5
 1933  -19   -3  -14    5   10   -6    4    2    2   -4    2    5
 1934    8    8   -7    1   -4    6   -1  -29   -9    7   15   -5
 1935    4   -2    5    4    4    0   -2    9   -2    2    7   -2
 1936    0    2    0   24   -2   -3    1  -21   -1    0  -16   -6
 1937    7    0   -6   -1    9    0   -4    1    6   -4  -12    2
 1938    3   -2   -4    1    5   11   17    6   11   21   -9   20
 1939   19    7    7    8    1   -3   11  -15   -4  -17  -11   -1
 1940   -6  -12  -10    2   -6  -11  -12  -16  -11    1   -5  -35
 1941   -6   -3  -11   -2   -6   -7   -8  -14   -7  -22  -12   -4
 1942   -6  -12   -3    2   -5    2    0   -2    5    1  -13   19
 1943   19    4    3   10    2   -5    0    3    0    4    0  -15
 1944   -9    8    8    1    5    0   -4   11    8   -9  -10   -4
 1945   12   10    4    0    3    2    9   11   13    7   -2   10
 1946   -6   -3    4   -2   -8   -6   -8   -2  -20  -10    0  -13
 1947    1  -13   13   -4   -3    3   16   -2   14   -5    6    2
 1948    3   -8  -10   -1    3   -5   -6  -14  -11    6   -7   -9
 1949   -6   -7   -6    8   -6   -6   -3   -2    1   -1   -9   -8
 1950   -6   12   19    2   -1   14   23   10    8   15   -6   14
 1951   17   -3  -18  -10   -7  -16  -18   -6  -15  -14   -8    0
 1952  -14  -11    7    0    3    8    7   -7   -3   -4  -12  -14
 1953   10   -7   -9   -6  -14   -4    7  -26  -11   -1    0   -3
 1954   -3   -3   -4  -10   -4   -6   -1    4    2    2    5   15
 1955    9    1   -7  -12   -1    2   14    7   13   11   10   19
 1956    8    6    8    1    3    2    0    3   -5   20    1    0
 1957   12   -8   -4    1   -3   -3    1  -10   -6    6   -9   -4
 1958  -14  -10    0   -4  -15  -10   -3   -1  -11  -16   -6   -5
 1959  -21  -10    6   -1   -2   -6   -3   -6   -1    4    4    2
 1960    2   -3    3    0   -3   -4    2    6   -4   -2    8   10
 1961    3   11  -22    9    4   -1    3    2    3  -12   14   19
 1962   23    0    3    5    7   -3   -8   13    1    7    0   -1
 1963   14   19    2   -1   -2   -4    3  -10   -2   -7    1   -6
 1964    1    3    7   15   -3    3    0   15    7    9   -8   -5
 1965   -9   -6   -3    3    1   -1  -11  -10  -10   -2  -13   -6
 1966  -14   -7  -18   -4    2    9   -3    3   -3    1   -1   -7
 1967   19   17    8    9   -3    7    0    8   17    0   -7   -8
 1968  -14    3   -2    0    4   11    8   -2   -3   -1    3    3
 1969  -33  -17    8    4   -7    0   -6   -2  -20  -12    1    1
 1970   -3  -18   -3    0   -1    5    0   -3    2   -4   15   13
 1971    0   11   17   13    6    7   -3   11   14   16    4  -13
 1972    2    1   -7    5   -6  -13  -21   -5   -8    0    3   -3
 1973    3  -13   -3   -7    2   -1    3    5   16    4   16   24
 1974   20   11   14    7   14    1   15    2   10    3  -14  -11
 1975  -10   13    9    1    2    7   20   16   22   10   13   19
 1976   12   14    2    6   13   -1   -8   -7  -12   -3    2  -17
 1977  -13    5  -15  -13  -10  -13  -17  -12   -6   -6  -12  -14
 1978   12  -31    6   -3    5   -8   -9   -7   -3  -10    2   -3
 1979  -12   16   -5   -4    7    7    3   -4   -1   -2   -6   -4
 1980    2   -2  -22  -13   -1   -6   -1    7   -2   -4   -4   -4
 1981   -7  -12  -10   -2    6    4    1    3    4   -6   -2    9
 1982   21    4    0    1   -1  -11  -15  -19  -13  -16  -27  -24
 1983  -30  -35  -29   -8   14    2    2   10   17    4    6    9
 1984    9   -2   -9    9    1   -5    3   -4    0   -3    6  -27
 1985    5    6  -12   -2  -12  -12    2    7   -5  -10   -8    5
 1986    0  -22    7    0   -2   -3    1  -21   -7   10  -18   -5
 1987   -6  -20   -2   -9  -11  -20  -11   -8   -4   -5    0   -7
 1988   11  -11   -6    5   11   11   15   19   19    7   16   12
 1989   18   19    7    6   10   11    5   -6    6    3   -6    4
 1990    3   -4  -11    2   11   -1    6   -2    0    4   -7   -3
 1991   10   -1   -3  -11   -7    0    2   -2  -15  -18    0  -24
 1992  -16  -10  -18   -7    2  -17    6    1   -7  -24   -6  -13
 1993  -13  -20    7   -6    4   -8  -12    0    1  -11    0   -2
 1994    0   -1   -4  -14   -6  -10  -16   -7  -14  -12   -3   -5
 1995   -2    5    0  -15   -5    2    3    4    5   -8    0  -11
 1996   11   -3    7    6   14   15    5    4   -6   -2   -6   -5
 1997   18    9   -8    5  -19   -9   -2   -9    1   -3    3   -7
 1998  -35   -6  -31  -14    6    8   17   14   15    7    3    9
 1999   18    9    1   14   13    5    9   13    3   11   11   17
 2000   15   25   13   10   10    1   -5    2   17    1   10  -12
 2001   27

March 2001

Todd Mitchell (mitchell@atmos.washington.edu)

JISAO data