Geofluids

Research Article

The Distribution of Dissolved Methane and Its Air-Sea Flux in the Plume of a Seep Field, Lingtou Promontory, South China Sea

Table 1

The CH₄ concentrations of bottom and surface seawater, as well as the O₂ concentration, temperature, water depth, salinity of all the sites, and the values in seawater and bubbles from the Lingtou Promontory seep area.


Station	Latitude	Longitude	Water depth (m)	CH₄ concentration (nmol L⁻¹)	δ¹³C (‰)	O₂ concentration (mL)	Salinity (‰)	Temperature (°C)

Dot 1	18°4152	108°4113	0.50	3.18	—	7.81	32.72	29.67
Dot 1	18°4152	108°4113	4.10	10.00	—	8.13	32.62	29.38

Dot 2	18°4137	108°4029	0.50	11.27	—	7.57	33.14	29.37
Dot 2	18°4137	108°4029	5.31	5472.08	—	7.82	33.21	29.16

Dot 3	18°4158	108°3930	0.50	7.19	—	7.42	33.41	29.21
Dot 3	18°4158	108°3930	6.48	9.93	—	7.91	33.38	29.13

Dot 4	18°4158	108°3857	0.50	12.09	—	7.49	33.48	28.92
Dot 4	18°4158	108°3857	7.10	11.06	—	7.94	33.37	29.00

Dot 5	18°4202	108°3828	0.50	19.74	—	7.31	33.49	29.12
Dot 5	18°4202	108°3828	7.50	23.80	—	7.38	33.33	29.09

Dot 6	18°4201	108°3751	0.50	36.10	—	7.59	33.43	28.82
Dot 6	18°4201	108°3751	8.07	10.95	—	7.49	33.26	28.61

Dot 7	18°4202	108°3701	0.50	19.55	—	7.43	33.39	28.84
Dot 7	18°4202	108°3701	7.30	4.98	—	7.63	33.35	28.71

Dot 8	18°4157	108°3558	0.50	64.70	—	7.48	33.36	28.74
Dot 8	18°4157	108°3558	5.34	28.54	—	7.82	33.24	28.74

Dot 9	18°4158	108°3500	0.50	9.65	—	7.39	33.39	28.71
Dot 9	18°4158	108°3500	6.30	26.31	—	7.64	33.32	28.68

Dot 10	18°4201	108°3400	0.50	68.95	—	6.94	33.36	28.86
Dot 10	18°4201	108°3400	7.67	9.13	—	7.23	33.36	28.78

Dot 11	18°4227	108°3402	0.50	7.62	—	7.01	33.37	28.96
Dot 11	18°4227	108°3402	6.41	79.85	—	7.47	33.36	28.81

Dot 12	18°4227	108°3501	0.50	1500.49	—	7.29	33.39	28.90
Dot 12	18°4227	108°3501	6.55	17.73	—	7.27	33.27	28.88

Dot 13	18°4232	108°3600	0.50	975.45	—	6.85	33.47	29.21
Dot 13	18°4232	108°3600	5.22	50.36	—	7.19	33.39	29.05

Dot 14	18°4243	108°3831	0.50	11.43	—	7.02	33.41	29.42
Dot 14	18°4243	108°3831	5.94	7.35	—	7.23	33.32	29.31

Dot 15	18°4228	108°3835	0.50	12.45	—	6.93	33.4	29.27
Dot 15	18°4228	108°3835	7.36	45.40	—	7.15	33.38	29.23

Dot 16	18°4225	108°3902	0.50	10.56		7.17	33.38	29.28
Dot 16	18°4225	108°3902	6.11	11.54		7.41	33.33	29.21

Dot 17	18°4224	108°3934	0.50	6.80	—	6.96	33.36	29.32
Dot 17	18°4224	108°3934	7.38	65.62	—	7.13	33.38	29.28

Dot 18	18°4233	108°3959	0.50	26.09	—	7.04	33.35	29.47
Dot 18	18°4233	108°3959	6.79	22.54	—	7.26	33.31	29.45

Dot 19	18°4230	108°4031	0.50	4140.60	—	7.12	33.23	29.68
Dot 19	18°4230	108°4031	6.42	17.98	—	7.38	32.98	29.66

Dot 20	18°4235	108°4105	0.50	16.67	—	7.18	33.17	30.04
Dot 20	18°4235	108°4105	5.48	9.01	—	7.67	33.15	30.02

Dot 21	18°4159	108°4104	0.50	19.15	—	7.22	33.17	29.98
Dot 21	18°4159	108°4104	4.94	9.42	—	7.85	33.22	29.93

Dot 22	18°4159	108°4129	0.50	14.95	—	7.58	32.96	30.32
Dot 22	18°4159	108°4129	4.7	390.64	—	8.08	32.93	30.31

Dot 23	18°4059	108°4059	0.50	12318.50	−59.17	7.15	33.04	29.55
Dot 23	18°4059	108°4059	3.44	2313.53	—	7.23	33.08	29.49

Dot 24	18°4159.5	108°4029	0.50	45.89	—	7.2	33.34	29.29
Dot 24	18°4159.5	108°4029	4.45	31740.02	−59.54	7.36	33.34	29.28

Dot 25	18°4059	108°4003	0.50	13577.35	−59.76	7.26	33.34	29.23
Dot 25	18°4059	108°4003	4.45	—	—	7.39	33.33	29.22

Dot 26	18°4056	108°3915	0.5	33.25	—	7.16	33.37	29.19
Dot 26	18°4056	108°3915	3.72	209.05	—	7.12	33.38	29.16

Dot 27	18°4059	108°3859	0.5	171.06	—	7.18	33.39	29.22
Dot 27	18°4059	108°3859	5.55	10.04	—	7.2	33.23	29.17

Dot 28	18°4059.9	108°3829	0.5	12.23	—	7.12	33.38	29.31
Dot 28	18°4059.9	108°3829	6.08	435.28	—	7.22	33.34	29.23

Dot 29	18°4059.5	108°3759	0.5	8.84	—	7.17	33.38	29.22
Dot 29	18°4059.5	108°3759	7.01	8.69	—	7.26	33.29	29.12

Dot 30	18°4059.3	108°3658	0.5	107.98	—	7.2	33.39	28.68
Dot 30	18°4059.3	108°3658	7.03	22.35	—	7.19	33.33	28.65

Dot 31	18°4059.7	108°3558.2	0.5	6.17	—	7.15	33.39	28.71
Dot 31	18°4059.7	108°3558.2	5.74	23386.77	−48.59	7.2	33.25	28.66

Dot 32	18°4101	108°3459.4	0.50	2.90	—	7.09	33.37	29.03
Dot 32	18°4101	108°3459.4	5.75	9.99	—	7.25	33.27	28.87

Dot 33	18°4059.7	108°3358	0.50	22.08	—	7.08	33.34	28.93
Dot 33	18°4059.7	108°3358	6.96	5.17	—	7.2	33.32	28.75

Dot 34	18°4131.6	108°3400	0.50	9.80	—	7.04	33.35	29.05
Dot 34	18°4131.6	108°3400	10.38	171.94	—	7.29	33.12	28.79

Dot 35	18°4129.4	108°3501	0.50	115.34	—	7.14	33.36	29.07
Dot 35	18°4129.4	108°3501	9.76	107.83	—	7.3	33.32	29.04

Dot 36	18°4128.6	108°3602	0.50	7.82	—	7.08	33.39	28.86
Dot 36	18°4128.6	108°3602	6.52	101.58	—	7.23	33.28	28.85

Dot 37	18°4128.9	108°3701	0.50	8.51	—	7.18	33.45	28.94
Dot 37	18°4128.9	108°3701	5.27	547.26	—	7.22	33.3	28.81

Dot 38	18°4129.8	108°3801	0.50	4.01	—	7.07	33.47	29.53
Dot 38	18°4129.8	108°3801	6.70	573.54	—	7.17	33.35	29.14

Dot 39	18°4129.9	108°3838.6	0.5	7.69	—	7.04	33.43	29.57
Dot 39	18°4129.9	108°3838.6	8.21	4.98	—	7.24	33.34	29.15

Dot 40	18°4129.8	108°3901	0.5	250.93	—	7.14	33.65	29.49
Dot 40	18°4129.8	108°3901	8.06	162.68	—	7.29	33.59	29.19

Dot 41	18°4129.3	108°3930.7	0.5	24.02	—	7.01	33.66	29.49
Dot 41	18°4129.3	108°3930.7	7.59	9.10	—	7.18	33.64	29.18

Dot 42	18°4129	108°4001	0.5	7.75	—	7.24	33.35	29.56
Dot 42	18°4129	108°4001	6.99	65.26	—	7.35	33.37	29.41

Dot 43	18°4128.4	108°4031.1	0.5	4.13	—	7.33	33.44	29.75
Dot 43	18°4128.4	108°4031.1	6.37	233.55	—	7.42	33.34	29.65

Dot 44	18°4158.4	108°3959.7	0.5	28.80	—	7.1	33.8	29.59
Dot 44	18°4158.4	108°3959.7	5.81	21.07	—	7.38	33.72	29.53

Dot 45	18°4131.2	108°4111.8	0.5	153.62	—	7.46	33.16	30.09
Dot 45	18°4131.2	108°4111.8	6.15	122.29	—	7.93	33.14	29.98

Dot 46	18°4054.6	108°4104	0.5	551.39	—	7.72	33.15	30.2
Dot 46	18°4054.6	108°4104	5.23	495.30	—	8.12	33.12	30.12

Dot 47	18°4058.7	108°4129.2	0.5	7.73	—	7.9	32.86	30.42
Dot 47	18°4058.7	108°4129.2	5.35	169.94	—	8.02	32.76	30.25

Dot 48	18°4132.4	108°4135.4	0.5	19.05	—	7.89	32.79	30.49
Dot 48	18°4132.4	108°4135.4	3.45	187.42	—	8.32	32.61	30.41

Dot 49	18°420.2	108°4128.1	0.5	14.00	—	8.05	32.82	30.49
Dot 49	18°420.2	108°4128.1	3.6	11.92	—	8.59	32.7	30.3

YG	18°4115.7	108°4137.0	5.00	—	−35.98	—	—	—

Ys-1	18°41.136	108°41.304	0.50	—	−35.51	—	—	—

Data are taken from Huang et al. [28] and Di et al. [35].