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<p>This study integrates natural RaDEF radionuclide chronometry with fission‑product fallout diagnostics to reconstruct the dynamic histories of three thunderstorms sampled in 1974 and 1977. Using sequential precipitation fractions, isotope concentrations and ratios reveal when storm variables such as updraft structure, cell regeneration, downdrafts, and boundary‑layer surges dominated aerosol sourcing. The combined diagnostics show that each storm accessed distinct radioactive aerosol reservoirs at different times, enabling high‑resolution reconstruction of storm evolution. This work demonstrates the novelty and power of multi‑isotope forensic methods for decoding convective storm dynamics.</p>

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Radionuclide sequential sampling of Spring 1974 and 1977 thunderstorms

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Kenneth G. W. Inn,
  • Paul K. Kuroda,
  • Robert Holloway,
  • Muralidhara Gavini,
  • William Raines,
  • Michael Flanders,
  • Carl Harris,
  • Neal G. Sumerlin,
  • James N. Beck

摘要

This study integrates natural RaDEF radionuclide chronometry with fission‑product fallout diagnostics to reconstruct the dynamic histories of three thunderstorms sampled in 1974 and 1977. Using sequential precipitation fractions, isotope concentrations and ratios reveal when storm variables such as updraft structure, cell regeneration, downdrafts, and boundary‑layer surges dominated aerosol sourcing. The combined diagnostics show that each storm accessed distinct radioactive aerosol reservoirs at different times, enabling high‑resolution reconstruction of storm evolution. This work demonstrates the novelty and power of multi‑isotope forensic methods for decoding convective storm dynamics.