Deciphering key processes controlling rainfall isotopic variability during extreme tropical cyclones
| Autor: | Kristen Welsh, Carlos M. Alonso-Hernández, Chris Soulsby, Ana María Durán-Quesada, Naoyuki Kurita, Kim M. Cobb, Christian Birkel, Doerthe Tetzlaff, Daniela Rojas-Cantillano, Germain Esquivel-Hernández, Minerva Sánchez-Llull, Jan Boll, Ricardo Sánchez-Murillo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Atmospheric chemistry
CATÁSTROFES NATURALES ISOTOPOS 010504 meteorology & atmospheric sciences Range (biology) Science 0208 environmental biotechnology General Physics and Astronomy Mesoamerica 02 engineering and technology IMPACTO AMBIENTAL Atmospheric sciences 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Hydrology (agriculture) Natural hazard HURACANES COSTA RICA Precipitation lcsh:Science 0105 earth and related environmental sciences PRECIPITACIÓN Multidisciplinary 551.6 Climatología y estado atmosférico Natural hazards Tropics General Chemistry 020801 environmental engineering Ciclón PRECIPITATION ISOTOPES Environmental science Caribe lcsh:Q Hydrology Tropical cyclone Climate sciences |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019) Nature Communications 10: 4321 2019 Repositorio UNA Universidad Nacional de Costa Rica instacron:UNA Nature Communications Nature communications, vol.10, pp.1-10 Kérwá Universidad de Costa Rica instacron:UCR |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-019-12062-3 |
| Popis: | The Mesoamerican and Caribbean (MAC) region is characterized by tropical cyclones (TCs), strong El Niño-Southern Oscillation events, and climate variability that bring unique hazards to socio-ecological systems. Here we report the first characterization of the isotopic evolution of a TC (Hurricane Otto, 2016) in the MAC region. We use long-term daily rainfall isotopes from Costa Rica and event-based sampling of Hurricanes Irma and Maria (2017), to underpin the dynamical drivers of TC isotope ratios. During Hurricane Otto, rainfall exhibited a large isotopic range, comparable to the annual isotopic cycle. As Hurricane Otto organized into a Category 3, rapid isotopic depletion coupled with a decrease in d-excess indicates efficient isotopic fractionation within ~200 km SW of the warm core. Our results shed light on key processes governing rainfall isotope ratios in the MAC region during continental and maritime TC tracks, with applications to the interpretation of paleo-hydroclimate across the tropics. “Reconstruction of precipitation variability from oxygen isotopes in the Mesoamerican and Caribbean region is made difficult by the occurrence of tropical cyclones. Here, the isotopic evolution of a tropical cyclone is studied in detail which helps disentangle the key processes governing rainfall isotope variability in the region.” |
| Databáze: | OpenAIRE |
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