function [t,xn,xs,en,es,scale]=cfc11atmhist98;
% CFC11ATMHIST98 Atmospheric history for CFC11 on SIO-1998 calibration scale
%
% [T,XN,XS,EN,ES,SCALE]=CFC11ATMHIST98 Returns columnn vectors of:
% T  = Time (mid year)
% XN = Mixing ratio in N. hemisphere [ppt]
% XS = Mixing ratio in S. hemisphere [ppt]
% EN = Uncertainty in N. hemisphere mixing ratio [ppt]
% ES = Uncertainty in S. hemisphere mixing ratio [ppt]
% SCALE = Name of calibration scale against which measurements were made
%
% All concentrations are on the SIO-1998 calibration scale
%
% Atmospheric lifetime assumed to be  45.0 years
%
% Walker, S. J., R. F. Weiss and P. K. Salameh, Reconstructed histories of
%         the annual mean atmospheric mole fractions for the halocarbons
%         CFC-11, CFC-12, CFC-113 and carbon tetrachloride. Journal of 
%         Geophysical Research, 105, C6, 14,285-14,296, 2000
%
% This file obtained from:
%
%  http://gaslab.ucsd.edu/pub/cfchist/ 
%  Created: 19-July-2004
%
%   Stephen J. Walker 
%   Scripps Institution of Oceanography

%
%      Northern        Southern
% Year Value Error  Value  Error
%      [ppt] [ppt]  [ppt]  [ppt]
%  (1)  (2)   (3)    (4)    (5)
%
scale='SIO-1998';
data=[
 1931.5   0.0  0.0    0.0  0.0
 1932.5   0.0  0.0    0.0  0.0
 1933.5   0.0  0.0    0.0  0.0
 1934.5   0.0  0.0    0.0  0.0
 1935.5   0.0  0.0    0.0  0.0
 1936.5   0.0  0.0    0.0  0.0
 1937.5   0.0  0.0    0.0  0.0
 1938.5   0.0  0.0    0.0  0.0
 1939.5   0.0  0.0    0.0  0.0
 1940.5   0.0  0.0    0.0  0.0
 1941.5   0.0  0.0    0.0  0.0
 1942.5   0.0  0.0    0.0  0.0
 1943.5   0.0  0.0    0.0  0.0
 1944.5   0.0  0.0    0.0  0.0
 1945.5   0.1  0.0    0.0  0.0
 1946.5   0.1  0.0    0.1  0.0
 1947.5   0.1  0.0    0.1  0.0
 1948.5   0.2  0.0    0.1  0.0
 1949.5   0.4  0.0    0.3  0.0
 1950.5   0.7  0.0    0.4  0.0
 1951.5   1.0  0.0    0.7  0.0
 1952.5   1.5  0.1    1.0  0.0
 1953.5   2.2  0.1    1.5  0.1
 1954.5   3.0  0.1    2.2  0.1
 1955.5   4.1  0.2    3.0  0.1
 1956.5   5.4  0.2    4.0  0.1
 1957.5   6.8  0.2    5.2  0.2
 1958.5   8.1  0.3    6.5  0.2
 1959.5   9.4  0.3    7.8  0.3
 1960.5  11.1  0.4    9.2  0.3
 1961.5  13.3  0.4   10.9  0.3
 1962.5  16.1  0.5   13.1  0.4
 1963.5  19.6  0.6   15.8  0.5
 1964.5  23.8  0.7   19.2  0.5
 1965.5  28.4  0.8   23.1  0.6
 1966.5  33.6  0.9   27.6  0.7
 1967.5  39.5  1.0   32.7  0.8
 1968.5  46.1  1.1   38.3  0.9
 1969.5  53.7  1.3   44.8  1.0
 1970.5  62.5  1.4   52.3  1.2
 1971.5  72.0  1.6   60.7  1.3
 1972.5  82.7  1.7   70.0  1.5
 1973.5  94.9  1.9   80.4  1.6
 1974.5 108.4  2.1   92.2  1.8
 1975.5 121.4  2.2  104.7  2.0
 1976.5 133.9  2.3  117.1  2.2
 1977.5 145.9  2.4  129.3  2.3
 1978.5 156.6  2.4  140.8  2.5
 1979.5 168.3  1.1  148.8  0.9
 1980.5 176.7  2.0  159.3  1.1
 1981.5 184.3  2.3  167.8  1.1
 1982.5 191.4  2.0  176.1  0.8
 1983.5 199.4  1.8  184.5  0.9
 1984.5 208.1  1.8  192.5  0.9
 1985.5 218.1  2.0  202.2  0.9
 1986.5 229.5  1.9  211.5  1.2
 1987.5 241.7  2.4  222.4  1.4
 1988.5 253.0  1.5  233.4  0.8
 1989.5 259.5  1.6  242.3  0.8
 1990.5 266.0  1.5  251.2  0.9
 1991.5 268.4  1.2  256.8  0.9
 1992.5 268.3  1.1  260.9  0.9
 1993.5 269.7  0.7  262.6  0.5
 1994.5 269.8  1.1  263.8  0.4
 1995.5 268.5  0.3  263.2  0.4
 1996.5 267.3  0.3  263.1  0.4
 1997.5 265.9  0.3  262.1  0.2
 1998.5 264.4  0.3  261.1  0.2
 1999.5 262.9  0.4  259.9  0.2
 2000.5 262.0  0.3  258.7  0.2
 2001.5 260.3  0.3  256.9  0.2
 2002.5 258.1  0.3  255.2  0.2
 2003.5 256.0  0.3  253.4  0.2
];
t =data(:,1);
xn=data(:,2);
en=data(:,3);
xs=data(:,4);
es=data(:,5);