Cosmogenic Beryllium Isotopes in Earth Surface Dynamics

Cosmogenic beryllium isotopes, chiefly 10Be and its stable counterpart 9Be, have become indispensable tracers for quantifying rates and pathways of Earth surface processes. Produced by the interaction of cosmic rays with atmospheric gases or within mineral grains at Earth’s surface, these isotopes accumulate in soils, sediments and ice, recording integration periods from decades to millennia. In situ 10Be, generated within exposed rock or sediment grains, provides constraints on long-term erosion and surface exposure histories, while meteoric 10Be, delivered from the atmosphere by precipitation, and stable 9Be, liberated during chemical weathering, together yield denudation rates in diverse lithologies. Applications span soil redistribution on loess mantles, partitioning of chemical weathering versus physical erosion in carbonate terrains, tracing sediment transit times in river systems, and even reconstructing palaeo-ice-shelf retreat. By combining isotope ratios, depositional fluxes and geomorphological models, researchers have achieved a global perspective on landscape evolution, biogeochemical cycling and environmental change.

Research from Nature Portfolio

Recent studies have employed cosmogenic beryllium isotopes to unravel Holocene ice-sheet dynamics in West Antarctica. A beryllium-isotope-based reconstruction of ice-shelf history reveals a phase of accelerated melting and retreat between approximately 9 and 6 thousand years ago. Contrary to expectations of purely ocean-driven melting, the work demonstrates that atmospheric circulation shifts, connected via a Rossby wave train to tropical Pacific warming, were the dominant forcing mechanism. This millennial-scale record provides a critical benchmark for ice-sheet models and improves projections of future sea-level rise by validating the sensitivity of coastal glaciers to remote climatic teleconnections.

Cosmogenic Beryllium Isotopes in Earth Surface Dynamics publication trend

The graph below shows the total number of articles in cosmogenic beryllium isotopes in earth surface dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

In situ cosmogenic 10Be: A radioactive isotope produced within mineral grains at Earth’s surface by cosmic-ray spallation, used to date exposure and quantify erosion rates.

Meteoric 10Be: A cosmogenic isotope formed in the atmosphere and deposited to Earth by precipitation, serving as a tracer of sediment deposition and soil mixing.

Stable 9Be: The non-radioactive isotope of beryllium released during chemical weathering of rocks, employed alongside 10Be to calculate denudation rates.

Denudation: The combined processes of physical erosion and chemical weathering that lower and reshape the Earth’s surface over time.

Fluvial sediment transit time: The average duration that sediment particles are stored and transported within a river system before reaching downstream sinks.

References

1. Meteoric 10Be as a tracer of soil redistribution rates and reconstruction tool of loess–mantled soils (SW, Poland). Geoderma (2023).
2. River-to-ocean pathways of beryllium-9 through estuaries. Geochimica et Cosmochimica Acta (2024).
3. Denudation and Weathering Rates of Carbonate Landscapes From Meteoric 10Be/9Be Ratios. Journal of Geophysical Research Earth Surface (2024).
4. Holocene melting of the West Antarctic Ice Sheet driven by tropical Pacific warming. Nature Communications (2022).