Methane Emission From Global Lakes: New Spatiotemporal Data and Observation-Driven Modeling of Methane Dynamics Indicates Lower Emissions.

ABSTRACT: Lakes have been highlighted as one of the largest natural sources of the greenhouse gas methane (CH₄) to the atmosphere. However, global estimates of lake CH₄ fluxes over the last 20 years exhibit widely different results ranging from 6 to 185 Tg CH₄ yr^-1, which is to a large extent driven by differences in lake areas and thaw season lengths used. This has generated uncertainty regarding both lake fluxes and the global CH₄ budget. This study constrains global lake water CH₄ emissions by using new information on lake area and distribution and CH₄ fluxes distinguished by major emission pathways; ecoclimatic lake type; satellite-derived ice-free emission period length; and diel- and temperature-related seasonal flux

SUBMITTER: Johnson MS 

PROVIDER: S-EPMC9540782 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature