Climatology of tropical cyclones in the South Pacific Region and their relationships to El Niño events
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Paper/Presentation Title | Climatology of tropical cyclones in the South Pacific Region and their relationships to El Niño events |
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Presentation Type | Other |
Authors | |
Author | Deo, Ravinesh C. |
Journal or Proceedings Title | Proceedings of the 16th Australian New Zealand Climate Forum: Climate and Water (ANZCF2004) |
Number of Pages | 1 |
Year | 2004 |
Place of Publication | Lorne, Vic, Australia |
Web Address (URL) of Paper | http://www.bom.gov.au/events/anzcf2004/anzcf2004.pdf |
Conference/Event | 16th Australia New Zealand Climate Forum: Climate and Water (ANZCF2004) |
Event Details | 16th Australia New Zealand Climate Forum: Climate and Water (ANZCF2004) Event Date 08 to end of 10 Nov 2004 Event Location Lorne, Australia |
Abstract | An analysis of a 28-year dataset of tropical cyclones in the South Pacific Region, 135˚E–135˚W and below 5˚S, was carried out to examine the relationship between cyclone paths, origins, occurrences and frequency in relation to the Southern Oscillation (SO). The geographical map reveals that cyclones generally track southwest from their starting positions, and then change direction and move southeast irrespective of the ENSO cycle. Tropical cyclones are more severe during negative SOI periods. About 90% of the cyclones occurring during the negative SOI periods exceeded 80 knots, and only 10% had their maximum sustained wind speed of 80 knots or higher during the positive SOI periods. Over 60% of all cyclones occur during negative SOI periods. Hence cyclones are more severe, with higher numbers, during El Niño periods, and weaker with lower numbers during La Niña periods. The monthly cyclone numbers show a single peak in February. All |
ANZSRC Field of Research 2020 | 370201. Climate change processes |
370202. Climatology | |
Public Notes | No evidence of copyright restrictions on web site. Conference publication consists of only the abstracts of papers presented at the conference. Abstract only posted here. |
Byline Affiliations | University of Adelaide |
https://research.usq.edu.au/item/9zqxx/climatology-of-tropical-cyclones-in-the-south-pacific-region-and-their-relationships-to-el-ni-o-events
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