Methane at the NW of Weddell Sea, Antarctica

Table 1

Summary of analyses of C1 to C5 of sediment samples from the Antarctic seabed.

(a) Bouchard zone (Figure 1)

Number of samples; 88	C1; (ppm)	C2; (ppm)	C3; (ppm)	C4; (ppm)	n-C4; (ppm)	C5; (ppm)	n-C5; (ppm)
Maximum	9,995.63	49.25	36.71	11	6.4	2.32	0.28
Minimum	115.82	0.03	4.81	0.17	2.77	0.07	0.06
Average	423.31	21.14	10.49	4	2.77	0.66	0.25
	Maximum = 41		Minimum = 2		Average = c. 23
^2% C1	Maximum = 99.89%		Minimum = 63.44%		Average % C1 = c. 89%

(b) Weddell zone (Figure 1)

Number of samples; 54	C1; (ppm)	C2; (ppm)	C3; (ppm)	C4; (ppm)	n-C4; (ppm)	C5; (ppm)	n-C5; (ppm)
Maximum	1,753.87	86.65	64.06	22.75	19.28	14.06	4.91
Minimum	65.27	4.72	5.28	1.70	0.37	0.15	0.03
Average	369.60	32.40	26.40	7.55	6.49	2.90	1.66
	Maximum = 24		Minimum = 2		Average = c. 7
^2% C1	Maximum = 95.15%		Minimum = 70%		Average % C1 = c. 82%

= C1/C2 + C3; ²% C1 = C1 100/C1 + C2 + C3 + C4 + C5.