The contribution from northern high latitude wetlands are a major uncertainty in the atmospheric methane (CH₄) budget throughout the Holocene. We reconstructed CH₄ emissions from northern peatlands from 13,000 BP to present using an empirical model based on observations of peat initiation (>3600 dates), peatland type (>250 peat cores), and observed CH₄ emissions in order to explore the effects of changes in wetland type on CH₄ emissions over the end of the late glacial and the Holocene. Fen area increased steadily before 8000 BP as fens formed in major wetland complexes. After 8000 BP, new fen formation continued but widespread peatland succession (to bogs) and permafrost aggradation occurred. Reconstructed CH₄ emissions from peatlands increased rapidly between 10,600 BP and 6900 BP due to fen formation and expansion. Emissions stabilized after 5000 BP at 42 ± 25 Tg CH₄ y⁻¹ as high-emitting fens transitioned to lower-emitting bogs and permafrost peatlands. Widespread permafrost formation in northern peatlands after 1000 BP decreased CH₄ emissions by 20%–34 ± 21 Tg y⁻¹ by the present day and suggests peatland CH₄ emissions will increase with permafrost thaw.

北部高纬度湿地的贡献是整个全新世大气甲烷（CH ₄）预算的主要不确定因素。我们重建CH _4个使用基于泥炭类型（> 250泥炭芯）泥炭引发的观测（> 3600周的日期），经验模型，和观察到CH排放从北方泥炭地从13000 BP存在_4个，以探讨的影响排放晚冰川和全新世末期湿地类型对CH ₄排放的变化。在主要的湿地综合体中形成了fen，在8000 BP之前，before的面积稳定增加。8000 BP后，新的形成继续，但泥炭地演替（到沼泽）和永久冻土的聚集都发生了。重建的CH ₄由于的形成和扩张，泥炭地的排放量在10600 BP和6900 BP之间迅速增加。5000 BP之后，由于高排放的芬斯过渡到低排放的沼泽和永久冻土的泥炭地，排放在42±25 Tg CH ₄ y ^-1时稳定下来。如今，北泥炭地普遍形成的多年冻土形成使CH ₄排放量减少了20％–34±21 Tg y ^-1，这表明泥炭地CH ₄排放量将随着多年冻土融化而增加。