@article{fdi:010079965,
  title = {{C}arbon isotope evidence for large methane emissions to the {P}roterozoic atmosphere},
  author = {{C}adeau, {P}. and {J}ezequel, {D}. and {L}eboulanger, {C}hristophe and {F}ouilland, {E}. and {L}e {F}loc'h, {E}. and {C}haduteau, {C}. and {M}ilesi, {V}. and {G}uelard, {J}. and {S}arazin, {G}. and {K}atz, {A}. and {D}'{A}more, {S}. and {B}ernard, {C}. and {A}der, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {P}roterozoic {E}ra records two periods of abundant positive carbon isotope excursions ({CIE}s), conventionally interpreted as resulting from increased organic carbon burial and leading to {E}arth's surface oxygenation. {A}s strong spatial variations in the amplitude and duration of these excursions are uncovered, this interpretation is challenged. {H}ere, by studying the carbon cycle in the {D}ziani {D}zaha {L}ake, we propose that they could be due to regionally variable methane emissions to the atmosphere. {T}his lake presents carbon isotope signatures deviated by similar to+12 parts per thousand compared to the modern ocean and shares a unique combination of analogies with putative {P}roterozoic lakes, interior seas or restricted epireic seas. {A} simple box model of its {C}arbon cycle demonstrates that its current isotopic signatures are due to high primary productivity, efficiently mineralized by methanogenesis, and to subsequent methane emissions to the atmosphere. {B}y analogy, these results might allow the reinterpretation of some positive {CIE}s as at least partly due to regionally large methane emissions. {T}his supports the view that methane may have been a major greenhouse gas during the {P}roterozoic {E}ra, keeping the {E}arth from major glaciations, especially during periods of positive {CIE}s, when increased organic carbon burial would have drowned down atmospheric {CO}2.},
  keywords = {{OCEAN} {INDIEN} ; {MAYOTTE} ; {DZIANI} {DZAHA} {LAC}},
  booktitle = {},
  journal = {{S}cientific {R}eports - {N}ature},
  volume = {10},
  numero = {1},
  pages = {18186 [13p.]},
  ISSN = {2045-2322},
  year = {2020},
  DOI = {10.1038/s41598-020-75100-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079965},
}