Table 2. Concentrations of dissolved CO₂ and CH₄ in Lake Monoun.

		Concentration
Date	Gas, μmol/kg	61 m	68.6 m	79.3 m	95.4 m
March 1992	CH4		2,118	2,166	2,724
May 1998	CH4	2,213	2,803	2,227	3,385
Nov. 1999	CH4	2,384	2,520	2,496	3,449
Jan. 2003	CH4	2,462	2,857	2,474	3,682
Jan. 2004	CH4	2,622	2,745	2,885	3,948
March 1992	CO2	130,600	145,300	147,900	149,800
May 1998	CO2	143,200	157,700	150,600	152,800
Nov. 1999	CO2	141,700	150,900	153,600	146,300
Jan. 2003	CO2	148,500	157,700	155,500	148,900
Jan. 2004	CO2	140,200	148,600	156,900	157,200

All samples were collected in situ with stainless steel cylinders. Dates in italics are postdegassing.