- Title
- Influence of ENSO on tropical cyclone intensity in the Fiji region
- Creator
- Chand, Savin; Walsh, Kevin
- Date
- 2011
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/103071
- Identifier
- vital:10854
- Identifier
-
https://doi.org/10.1175/2011JCLI4178.1
- Identifier
- ISSN:08948755
- Abstract
- This study examines the variation in tropical cyclone (TC) intensity for different phases of the El Niño-Southern Oscillation (ENSO) phenomenon in the Fiji, Samoa, and Tonga (FST) region. The variation in TC intensity is inferred from the accumulated cyclone energy (ACE), which is constructed from the 6-hourly Joint Typhoon Warning Center best-track data for the period 1985-2006. Overall, results suggest that ACE in the FST region is considerably influenced by the ENSO signal. A substantial contribution to this ENSO signal in ACE comes from the region equatorward of 15°S where TC numbers, lifetime, and intensity all play a significant role. However, the ACE-ENSO relationship weakens substantially poleward of 15°S where large-scale environmental variables affecting TC intensity are found to be less favorable during El Niño years than during La Niña years; in the region equatorward of 15°S, the reverse is true. Therefore, TCs entering this region poleward of 15°S are able to sustain their intensity for a longer period of time during La Niña years as opposed to TCs entering the region during El Niñao years, when they decay more rapidly. © 2011 American Meteorological Society.
- Relation
- Journal of Climate Vol. 24, no. 15 (2011), p. 4096-4108
- Rights
- Copyright © 2011 American Meteorological Society.
- Rights
- This metadata is freely available under a CCO license
- Subject
- ENSO; Hurricanes; South Pacific; Tropical Cyclones; Accumulated cyclone energies; ENSO signal; Environmental variables; Influence of ENSO; Tropical cyclone; Tropical cyclone intensity; Warning centers; Atmospheric pressure; Nickel compounds; Storms; Tropics; El Nino; El Nino-Southern Oscillation; hurricane; La Nina; Precipitation intensity; Storm track; Fiji; Pacific Ocean; Pacific Ocean (South); Samoa; Tonga; 0401 Atmospheric Sciences; 0405 Geography
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