Pacific Circulation Index (Winter) (PCI) correct URL: http://www.pac.dfo-mpo.gc.ca/science/species-especes/climatology-ie/cori-irco/indices/pci.txt In order to make use of this index, you are requested to cite the original manuscript (below). For more information about this index, please see the original manuscript, or contact Dr. Jackie King (KingJac@pac.dfo-mpo.gc.ca). This index is the cumulative summation of negative northwesterly atmospheric circulation frequency anomalies, Z (westerly), M1, (northwesterly), and M2 (southwesterly) for December through March. An increasing trend in PCI reflects increased westerly and southwesterly atmospheric circulation off the west coast of Canada. Correct citation: King, J.R., V. V. Ivanov, V. Kurashov, R. J. Beamish and G. A. McFarlane. 1998. General circulation of the atmosphere over the North Pacific and its relationship to the Aleutian Low. North Pacific Anadromous Fish Commission Doc. No. 318. 18 p. Department of Fisheries and Oceans, Science Branch, Pacific Region, Pacific Biological Station, Nanaimo, BC, Canada, V9R 5K6. Arctic and Antarctic Research Institute, 38 Bering Street, St. Petersburg, Russia, 199397. (Abstract available at http://www.pac.dfo-mpo.gc.ca/sci/sa-mfpd/english/abst_cl2.htm) Year PCIwinter (Dec-Mar) 1900 -- 1901 7 1902 14 1903 4 1904 -20 1905 0 1906 16 1907 -4 1908 -2 1909 2 1910 1 1911 -28 1912 -21 1913 -19 1914 -29 1915 -16 1916 -30 1917 -54 1918 -49 1919 -31 1920 -32 1921 -16 1922 -22 1923 -32 1924 -26 1925 -21 1926 -2 1927 10 1928 25 1929 16 1930 26 1931 46 1932 51 1933 48 1934 54 1935 64 1936 74 1937 61 1938 68 1939 83 1940 103 1941 123 1942 124 1943 122 1944 117 1945 129 1946 148 1947 165 1948 173 1949 154 1950 121 1951 124 1952 108 1953 110 1954 84 1955 82 1956 46 1957 26 1958 17 1959 32 1960 35 1961 51 1962 23 1963 25 1964 27 1965 0 1966 -23 1967 -42 1968 -61 1969 -84 1970 -78 1971 -93 1972 -124 1973 -123 1974 -128 1975 -126 1976 -124 1977 -112 1978 -103 1979 -98 1980 -90 1981 -74 1982 -104 1983 -89 1984 -73 1985 -73 1986 -58 1987 -52 1988 -40 1989 -57 1990 -50 1991 -40 1992 -30 1993 -35 1994 -33 1995 -50 1996 -52 1997 -59 1998 -50 1999 -47 2000 -39 2001 -32 2002 -26 2003 -9 2004 0