The data you requested are contained in these files:

    icec.1836.nc
    icec.1837.nc
    icec.1838.nc
    icec.1839.nc
    icec.1840.nc
    icec.1841.nc
    icec.1842.nc
    icec.1843.nc
    icec.1844.nc
    icec.1845.nc
    icec.1846.nc
    icec.1847.nc
    icec.1848.nc
    icec.1849.nc
    icec.1850.nc
    icec.1851.nc
    icec.1852.nc
    icec.1853.nc
    icec.1854.nc
    icec.1855.nc
    icec.1856.nc
    icec.1857.nc
    icec.1858.nc
    icec.1859.nc
    icec.1860.nc
    icec.1861.nc
    icec.1862.nc
    icec.1863.nc
    icec.1864.nc
    icec.1865.nc
    icec.1866.nc
    icec.1867.nc
    icec.1868.nc
    icec.1869.nc
    icec.1870.nc
    icec.1871.nc
    icec.1872.nc
    icec.1873.nc
    icec.1874.nc
    icec.1875.nc
    icec.1876.nc
    icec.1877.nc
    icec.1878.nc
    icec.1879.nc
    icec.1880.nc
    icec.1881.nc
    icec.1882.nc
    icec.1883.nc
    icec.1884.nc
    icec.1885.nc
    icec.1886.nc
    icec.1887.nc
    icec.1888.nc
    icec.1889.nc
    icec.1890.nc
    icec.1891.nc
    icec.1892.nc
    icec.1893.nc
    icec.1894.nc
    icec.1895.nc
    icec.1896.nc
    icec.1897.nc
    icec.1898.nc
    icec.1899.nc
    icec.1900.nc
    icec.1901.nc
    icec.1902.nc
    icec.1903.nc
    icec.1904.nc
    icec.1905.nc
    icec.1906.nc
    icec.1907.nc
    icec.1908.nc
    icec.1909.nc
    icec.1910.nc
    icec.1911.nc
    icec.1912.nc
    icec.1913.nc
    icec.1914.nc
    icec.1915.nc
    icec.1916.nc
    icec.1917.nc
    icec.1918.nc
    icec.1919.nc
    icec.1920.nc
    icec.1921.nc
    icec.1922.nc
    icec.1923.nc
    icec.1924.nc
    icec.1925.nc
    icec.1926.nc
    icec.1927.nc
    icec.1928.nc
    icec.1929.nc
    icec.1930.nc
    icec.1931.nc
    icec.1932.nc
    icec.1933.nc
    icec.1934.nc
    icec.1935.nc
    icec.1936.nc
    icec.1937.nc
    icec.1938.nc
    icec.1939.nc
    icec.1940.nc
    icec.1941.nc
    icec.1942.nc
    icec.1943.nc
    icec.1944.nc
    icec.1945.nc
    icec.1946.nc
    icec.1947.nc
    icec.1948.nc
    icec.1949.nc
    icec.1950.nc
    icec.1951.nc
    icec.1952.nc
    icec.1953.nc
    icec.1954.nc
    icec.1955.nc
    icec.1956.nc
    icec.1957.nc
    icec.1958.nc
    icec.1959.nc
    icec.1960.nc
    icec.1961.nc
    icec.1962.nc
    icec.1963.nc
    icec.1964.nc
    icec.1965.nc
    icec.1966.nc
    icec.1967.nc
    icec.1968.nc
    icec.1969.nc
    icec.1970.nc
    icec.1971.nc
    icec.1972.nc
    icec.1973.nc
    icec.1974.nc
    icec.1975.nc
    icec.1976.nc
    icec.1977.nc
    icec.1978.nc
    icec.1979.nc
    icec.1980.nc