Calibrating a long-term meteoric Be-10 accumulation rate in soil

Lucas Reusser, Joseph Graly, Paul Bierman, Dylan Rood

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Using 13 samples collected from a 4.1 meter profile in a well‐dated and stable New Zealand fluvial terrace, we present the first long‐term accumulation rate for meteoric 10Be in soil (1.68 to 1.72 × 106 at/(cm2 ·yr)) integrated over the past ∼18 ka. Site‐specific accumulation data, such as these, are prerequisite to the application of meteoric 10Be in surface process studies. Our data begin the process of calibrating long‐term meteoric 10Be delivery rates across latitude and precipitation gradients. Our integrated rate is lower than contemporary meteoric 10Be fluxes measured in New Zealand rainfall, suggesting that long‐ term average precipitation, dust flux, or both, at this site were less than modern values. With accurately calibrated long‐term delivery rates, such as this, meteoric 10Be will be a powerful tool for studying rates of landscape change in environments where other cosmogenic nuclides, such as in situ 10Be, cannot be used.
Original languageEnglish
Number of pages5
JournalGeophysical Research Letters
Volume37
Issue number19
DOIs
Publication statusPublished - 15 Oct 2010
Externally publishedYes

Cite this