Douglas et et., 2020 Tables.xlsx

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	R	S
1	Table 1: Gas Ebullition Data
2	Sample	Latitude	Longitude	[CH4]	Estimated CH4 flux	Flux estimate source	CH4 d13C	1s	CH4 dD	1s	CH4 D18	1s	CH4 Fm	1s	CH4 14C Years	1s	CO2 d13C	1s
3	Alaska	(dec. degree)	(dec. degree)	%	L trap-1 day-1		(‰ VPDB)		(‰, VSMOW)								(‰ VPDB)
4	North slope
5	Qalluruq	70.38	-157.35	66	93400	Sample specific	-59.31	0.005	-238.33	0.12	6.8	0.25	0.000	0.0003	>47380		-37.8	0.41
6	Cake Eater	71.28	-156.64	69	0.017	Seep average	-64.00	0.005	-371.40	0.11	-0.4	0.23	0.609	0.0022	3990	30	-23.4	0.35
7	Central Alaska
8	Smith	64.87	-147.87	86	6.5	Type average	-62.73	0.005	-362.23	0.12	0.7	0.25	0.737	0.0023	2450	25	-11.0	0.548
9	Doughnut	64.90	-147.91	36	72	Sample specific	-55.49	0.005	-302.39	0.12	6.0	0.24	0.016	0.0003	33100	160	-4.1	0.35
10	Goldstream Hotspot A2	64.92	-147.85	83	6.5	Type average	-77.59	0.13	-382.97	0.13	2.0	0.35	0.029	0.0004	28400	110	-19.2	0.35
11	Goldstream 40A	64.92	-147.85	22	0.005	Type average	-61.90	0.005	-332.77	0.12	0.2	0.23	0.688	0.0025	3010	30	-24.1	0.145
12	Goldstream Tiny	64.92	-147.85	66	0.116	Type average	-64.34	0.005	-369.33	0.12	1.1	0.22		0.0003			-17.3	0.35
13	Goldstream HS1_138	64.92	-147.85	85	6.5	Type average	-77.69	0.014	-383.45	0.078	3.5	0.27	0.031	0.0003	27800	150	-32.1	0.35
14	Goldstream HS95_188	64.92	-147.85	89	6.5	Type average	-70.61	0.007	-341.23	0.163	5.2	0.29	0.170	0.0004	14250	40	-47.0	0.35
15	Goldstream HS1_180	64.92	-147.85	66	6.5	Type average	-76.73	0.005	-380.09	0.265	3.4	0.32					-25.5	0.35
16	Goldstream HS1_186	64.92	-147.85	89	6.5	Type average	-77.43	0.005	-380.72	0.153	4.1	0.37					-49.7	0.35
17	Goldstream HS1_198	64.92	-147.85	88	6.5	Type average	-77.18	0.006	-382.23	0.168	3.6	0.31					-43.8	0.35
18	Goldstream HS1_264	64.92	-147.85	84	6.5	Type average	-77.40	0.006	-380.35	0.166	4.4	0.29					-31.5	0.35
19	Goldstream HS95_13	64.92	-147.85	14	6.5	Type average	-69.99	0.004	-340.84	0.22	3.6	0.29					-25.6	0.35
20	Goldstream HS95_136	64.92	-147.85	88	6.5	Type average	-70.59	0.004	-343.41	0.178	5.5	0.18					-52.9	0.35
21	GoldstreamHS95_173	64.92	-147.85	87	6.5	Type average	-70.41	0.006	-344.73	0.184	5.1	0.22					-21.8	0.35
22	Goldstream HS95_178	64.92	-147.85	84	6.5	Type average	-70.41	0.004	-344.93	0.18	4.7	0.24					-51.5	0.35
23	Goldstream HS95_260	64.92	-147.85	83	6.5	Type average	-70.60	0.007	-346.89	0.13	5.2	0.29					-43.3	0.35
24
25
26	Stordalen				L m-2 day-2
27	IH_T4_6Jul14	68.36	19.05	72	4.5	Sample specific	-77.60	0.005	-285.90	0.12	5.4	0.25	0.784	0.004	1956	41
28	IH_T10_21Jul14	68.36	19.05	37	5.1	Sample specific	-68.05	0.005	-310.30	0.11	2.8	0.22	0.945	0.005	458	40.000
29	IH_T6_21Jul14	68.36	19.05	52	9.2	Sample specific	-68.28	0.005	-311.57	0.13	1.9	0.25	0.935	0.0047	542	40
30	MH_T21_21Jul14	68.36	19.04	30	1.5	Sample specific	-71.04	0.005	-288.10	0.11	4.4	0.22	0.805	0.004	1740	40
31	MH_T19_21Jul14	68.36	19.04	60	8.3	Trap average	-68.01	0.005	-282.22	0.12	4.6	0.23	0.861	0.0043	1201	40
32	MH_T24_21Jul14	68.36	19.04	83	183.5	Sample specific	-68.01	0.005	-293.19	0.13	5.0	0.24	0.703	0.0035	2830	40
33	VS_T31_21Jul14	68.35	19.05	67	41.4	Sample specific	-62.30	0.005	-312.78	0.13	1.8	0.24	0.948	0.0048	432	40
34	VS_T34_21Jul14	68.35	19.05	71	29.8	Sample specific	-65.49	0.005	-300.65	0.11	3.7	0.25	0.905	0.0045	805	40
35	VS_T313435_6Jun14	68.35	19.05	47	3.8	Sample specific	-66.60	0.005	-314.95	0.12	2.5	0.23
36	MH_T22_31Jul13	68.36	19.04	90	19.1	Sample specific							0.882	0.0047	1009	40
37	MH_T25_11Sep13	68.36	19.04	87	136.0	Sample specific							0.796	0.004	1834	40
38	MH_T28_11Sep13	68.36	19.04	85	11.3	Sample specific							0.755	0.0038	2256	40
39	MH_T23_21Jul14	68.36	19.04	30	2.2	Sample specific							0.953	0.0048	390	40
40
41	Data in italics previously published in Douglas et al., 2016
42	HS1 and HS95 refer to two hot-spot type seeps in Goldstream Lake sampled seasonally
43	Despcription of flux estimate sources:
44	Sample specific: value specific to sample analyzed
45	Seep or trap specific: Long-term mean for specified seep or trap
46	Type average: Mean flux for class of seep (Hotspot, A, or Tiny; classifications from Lindgren et al., 2016 and Walter Anthony and Anthony, 2013)
47
48	References:
49	Douglas, P., et al. (2016), Diverse origins of Arctic and Subarctic methane point source emissions identified with multiply-substituted isotopologues, Geochim Cosmochim Ac, 188, 163-188.
50	Lindgren, R., G. Grosse, K. Walter Anthony, and F. Meyer (2016), Detection and spatiotemporal analysis of methane ebullition on thermokarst lake ice using high-resolution optical aerial imagery, Biogeosciences, 13, 27-44.
51	Walter Anthony, K., and P. Anthony (2013), Constraining spatial variability of methane ebullition seeps in thermokarst lakes using point process models, Journal of Geophysical Research: Biogeosciences, 118, 1015-1034.
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