International audiencePast atmospheric methane emissions can be constrained by δ13CH4 records from ice cores only if changes to source δ13CH4 signatures and sink isotope effects with varying environmental and climatic conditions are accurately known. We present reconstructions of such changes based on paleodata and recent systems observations. The results are specific for budget scenarios and are reported here for two alternative types of budgets, one including aerobic methane emissions (AMP) from plants and the other type without AMP. Shifting atmospheric δ13CO2 potentially led to 13CH4 enrichment by 0.8‰ in the preindustrial Holocene (PIH) (~150–11,000 years (a) B.P.) and ~0.3–0.6‰ at the Last Glacial Maximum (LGM) (~18,000 a B.P.) relati...
International audienceMethane (CH$_4$) is a powerful greenhouse gas and plays a key part in global a...
Abstract. Little is known about how the methane source in-ventory and sinks have evolved over recent...
Atmospheric methane is an important greenhouse gas and a sensitive indicator of climate change and m...
International audiencePast atmospheric methane emissions can be constrained by δ13CH4 records from i...
We report a 2000-year Antarctic ice-core record of stable carbon isotope mea-surements in atmospheri...
Past atmospheric methane concentrations show strong fluctuations in parallel to rapid glacial climat...
International audienceAll recent climatic projections for the next century suggest that we are headi...
Little is known about how the methane source inventory and sinks have evolved over recent centuries....
Atmospheric methane (CH₄) records reconstructed from polar ice cores represent an integrated view on...
Methane (CH4) is a strong greenhouse gas and even though its atmospheric abundance is lower than car...
International audienceAtmospheric methane (CH4) records reconstructed from polar ice cores represent...
International audienceMethane (CH$_4$) is a powerful greenhouse gas and plays a key part in global a...
Abstract. Little is known about how the methane source in-ventory and sinks have evolved over recent...
Atmospheric methane is an important greenhouse gas and a sensitive indicator of climate change and m...
International audiencePast atmospheric methane emissions can be constrained by δ13CH4 records from i...
We report a 2000-year Antarctic ice-core record of stable carbon isotope mea-surements in atmospheri...
Past atmospheric methane concentrations show strong fluctuations in parallel to rapid glacial climat...
International audienceAll recent climatic projections for the next century suggest that we are headi...
Little is known about how the methane source inventory and sinks have evolved over recent centuries....
Atmospheric methane (CH₄) records reconstructed from polar ice cores represent an integrated view on...
Methane (CH4) is a strong greenhouse gas and even though its atmospheric abundance is lower than car...
International audienceAtmospheric methane (CH4) records reconstructed from polar ice cores represent...
International audienceMethane (CH$_4$) is a powerful greenhouse gas and plays a key part in global a...
Abstract. Little is known about how the methane source in-ventory and sinks have evolved over recent...
Atmospheric methane is an important greenhouse gas and a sensitive indicator of climate change and m...