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Bibliographic Details
Main Authors: Quock, Melinda, Schmidt, Amanda H, Corbett, Lee B, Bierman, Paul R, Hidy, Alan J, Caffee, Marc W
Format: Dataset Open Access
Language:en
Published: PANGAEA 2019
Subjects:
Online Access:https://doi.org/10.1594/PANGAEA.910131
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Table of Contents:
  • Tropical islands, including many in island arcs, are susceptible to recurring disturbances from extreme storms. To test whether such storms bias isotopic indicators of long-term erosion, we measured 10Be in samples collected before and after Hurricane Maria (2017, category five) from Dominica, an andesitic island in the Caribbean. Populations of before- and after-storm concentrations of 10Be are indistinguishable (n = 7 for in situ, n = 11 for meteoric); however, individual sample sites replicate less well with isotopic concentrations in samples taken before and after the storm varying by an average of 12%. These data suggest that processes controlling the depth and amount of near-surface erosion on Dominica during extreme storms are stochastic. Erosion rates determined from in situ 10Be are low compared to similarly steep and wet areas (median = 0.082 mm/yr, n = 12) and appear to be controlled by orographic precipitation.