. 2020 Jan 29;6(5):eaay7934. doi: 10.1126/sciadv.aay7934

Table 1. EC average sea-air CH₄ fluxes by region (in ng m⁻² s⁻¹ and mg m⁻² day⁻¹).

Regions marked with * are the same regions as used in table 2 of (4) for calculated sea-air CH₄ fluxes. Note that many of the regions are overlapping. “Seeps only” is defined as stations/areas with EC CH₄ measurements >6 mg m⁻² day⁻¹ (see Table 2 for locations).

	Spatially normalized fluxes
	Average (ng m⁻² s⁻¹)	Average (mg m⁻² day⁻¹)	Maximum (mg m⁻² day⁻¹)	No. of EC measurement locations
Arctic Ocean*	1.39	0.12	6.3	349
Shelf breaks and upper continental slope*	1.01	0.09	6.4	241
Shelf seas (Laptev + East Siberian + Chukchi seas)	17.3	1.50	618	1851
Laptev Sea (all)*	53.1	4.58	170	265
Laptev Sea, seeps only	363	21.4	170	32
East Siberian Sea (all)	20.2	1.74	618	834
East Siberian Sea, ice-covered /melt regions (<DoY 222.3)*	23.5	2.02	618	695
East Siberian Sea, ice-covered /melt regions	24.1	2.09	618	677
East Siberian Sea, ice-free	3.17	0.27	8.6	157
East Siberian Sea, seeps only	1004	63.3	618	17
Chukchi Sea, ice-free	2.51	0.22	8.4	429
Chukchi Sea, ice-covered/melt regions	0.39	0.03	8.3	326
Chukchi Sea (all)	1.62	0.14	8.4	755

Table 1. EC average sea-air CH4 fluxes by region (in ng m−2 s−1 and mg m−2 day−1).

Table 1. EC average sea-air CH₄ fluxes by region (in ng m⁻² s⁻¹ and mg m⁻² day⁻¹).