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June 19, 2026Nature Communications0 citationsOpen Access

Lithology Influences Organic Carbon Dynamics in Antarctic Fjords

Catchment lithology controls net carbon balance along the Antarctic Peninsula

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Authors

SHSongfan HeXZXiaowen ZhangHHH G Hu

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Overview

Randomized trial investigates organic carbon burial balance in Antarctic fjords, indicating significant climate implications.

Key Points

  • To examine how different bedrock types control organic carbon dynamics and burial in Antarctic fjords.
  • Applied ramped pyrolysis and oxidation analysis to sediment samples.
  • Utilized isotopic end-member mixing models to analyze organic carbon types.
  • Studied two Western Antarctic Peninsula fjords with distinct lithologies.
  • The sedimentary rock fjord had ten-fold higher petrogenic organic carbon burial than the volcanic rock fjord.
  • Estimated 6.1–8.8 Gg C yr−1 for biospheric organic carbon and 0.3–3.1 Gg C yr−1 for petrogenic organic carbon burial in fjords.
  • Model simulations predict 2–4 times increase in organic carbon burial flux with future ecosystem changes.

Cite This Study

He et al. (2026) studied this question.

synapsesocial.com/papers/6a34dcea65a5b0777af2ccc3https://doi.org/10.1038/s41467-026-74667-9
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