Extended Data Table 1 Comparison of wetland extent, flux, and emissions from recent emission products from the boreal tundra biomes

From: Current and future methane emissions from boreal-Arctic wetlands and lakes

Emission Product

Average Flux

(g CH4 m−2 yr−1)

Total Wetland Area

(106 km2)

Emissions

(Tg CH4 yr−1)

BAWLD Wetlands (this study)

7.55

3.18

24

GCP Ensemble

13.3

1.6

21.3

RF-Peat

12.2

1.93

23.5

RF-GLWD

12.6

2

25.1

upCH4

9.25

1.6

14.8

  1. RF-PEATMAP and RF-GLWD fluxes & emissions are based on random-forest upscaling of boreal-Arctic eddy covariance data48 (for years 2013 & 2014). The UpCH4 emissions product uses the WAD2M wetland map and a global eddy covariance random forest model (2000-2017)7. GCP-BU is the Global Carbon Project Bottom-Up ensemble model3 (2000-2017), which also uses the WAD2M wetland map. CT-CH4-2023 is NOAA’s CarbonTracker-CH4-2023 inversion model11.
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