Table 3.

Overall lake stability (S) and CO₂ content in Lake Nyos and Lake Monoun

Date	Lake	S, Joule/m2	Total CO2†	CO2 at depth‡
March–April 1992	Nyos	65,570	1.343	1.325
May 1998	Nyos	69,720	1.375 ± 0.021	1.355 ± 0.023
Nov. 1999	Nyos	75,250	1.438 ± 0.014	1.410 ± 0.010
Jan. 2001	Nyos	71,970	1.504 ± 0.061	1.452 ± 0.064
Jan. 2003	Nyos	71,110	1.390 ± 0.001	1.362 ± 0.036
Jan. 2004	Nyos	67,980	1.305 ± 0.009	1.302 ± 0.009
March–April 1992	Monoun	6,500	5.362	5.328
Nov. 1999	Monoun	6,700	5.849 ± 0.114	5.831 ± 0.115
Jan. 2003	Monoun	6,420	6.284 ± 0.011	6.250 ± 0.020
Jan. 2004	Monoun	7,130	5.393 ± 0.065	5.365 ± 0.066

^†CO₂ content is in mol × 10¹⁰ for Lake Nyos and mol × 10⁸ for Lake Monoun (main basin only)

^‡CO₂ at depth gives content from 50- to 210-m depth (Nyos) and 20- to 100-m depth (Monoun). CO₂ content of surface waters is equal to (total CO₂ – CO₂ at depth), and changes over time of this difference indicate surface water losses of CO₂