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July 24, 2026Quaternary Science ReviewsOpen Access

Millennial-scale carbon-source changes revealed by sedimentary radiocarbon in Arctic lakes

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Authors

LMLeah P. MarshallDKDarrell S. KaufmanNMNicholas P. McKay

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Overview

Randomized trial analyzes carbon cycling in Arctic lakes, indicating effects of climate and geomorphology.

Key Points

  • This research aims to understand the dynamics of organic carbon in Arctic lakes over millennial timescales.
  • Analyzed Δ age from five lakes in Alaska, Russia, and Siberia.
  • Utilized 191 bulk sediment radiocarbon ages and 87 macrofossil radiocarbon ages spanning 20,000 years.
  • Examined relationships between Δ age and sediment physical properties.
  • Lake-averaged Δ age ranges from several hundred to nearly 10,000 years.
  • Total productivity controls the proportion of old carbon, while sediment flux significantly influences organic carbon accumulation.
  • Δ age was larger in the late Pleistocene than the Holocene, indicating differences in vegetation productivity and organic horizons.

Cite This Study

Marshall et al. (2026) studied this question.

synapsesocial.com/papers/6a630020395161722cd152c6https://doi.org/10.1016/j.quascirev.2026.110121
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