Stable isotope tempestology of tropical cyclones across the North Atlantic and Eastern Pacific Ocean basins.

ABSTRACT: Tropical cyclones (TCs) are one of the major natural hazards to island and coastal communities and ecosystems. However, isotopic compositions of TC-derived precipitation (P) in surface water (SW) and groundwater (GW) reservoirs are still lacking. We tested the three main assumptions of the isotope storm "spike" hypothesis (sudden spikes in isotopic ratios). Our database covers 40 TCs and is divided into recent (N = 778; 2012-2023) and archived (N = 236; 1984-1995) rainfall isotope observations and SW/GW isotope monitoring (N = 6013; 2014-2023). Seasonal rainfall contribution from TCs ranged from less than 1% to over 54% (4% on average) between 1984 and 2023. Mean δ¹⁸O compositions across TCs domains were significantly lower than the regional (noncyclonic) δ¹⁸O mean (-

SUBMITTER: Sanchez-Murillo R 

PROVIDER: S-EPMC11776453 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature