Year (y)

of collection

Background radiocarbon concentration (Δ¹⁴C_bg) in per mil

Background fraction of the modern carbon

(F_bg)

Sample fraction of the modern carbon

(F_Sample)

The Suess Effect Indicator values ((S)_ff) in %

1960

235

1.235

1.182 ± 0.005

4.29 ± 0.018

1961

223

1.223

1.202 ± 0.005

1.72 ± 0.007

1964

804

1.804

1.770 ± 0.008

1.88 ± 0.008

1966

730

1.73

1.674 ± 0.006

3.23 ± 0.011

1968

601

1.601

1.600 ± 0.006

0.06 ± 0.001

1970

556

1.556

1.518 ± 0.006

2.44 ± 0.009

1976

387

1.387

1.377 ± 0.005

0.72 ± 0.002

1979

326

1.326

1.301 ± 0.005

1.88 ± 0.007

1981

277

1.277

1.272 ± 0.005

0.39 ± 0.001

1987

221

1.221

1.201 ± 0.005

1.64 ± 0.007

1990

190

1.19

1.181 ± 0.005

0.76 ± 0.003

1993

156

1.156

1.140 ± 0.005

1.38 ± 0.006

1996

133

1.133

1.121 ± 0.005

1.06 ± 0.004

1998

115

1.115

1.103 ± 0.006

1.08 ± 0.005

2000

100

1.1

1.084 ± 0.006

1.45 ± 0.008

2003

92

1.092

1.073 ± 0.005

1.74 ± 0.008

2005

90

1.09

1.064 ± 0.006

2.38 ± 0.013

2007

75

1.075

1.052 ± 0.006

2.14 ± 0.012

2009

70

1.07

1.041 ± 0.006

2.71 ± 0.015

2010

65

1.065

1.050 ± 0.006

1.41 ± 0.008