How well do IPCC-AR4 models simulate Australian rainfall teleconnections during two-consecutive positive Indian Ocean dipole events?
Presentation
Paper/Presentation Title | How well do IPCC-AR4 models simulate Australian rainfall teleconnections during two-consecutive positive Indian Ocean dipole events? |
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Presentation Type | Presentation |
Authors | Sullivan, Arnold, Cai, W. and Cowan, T. D. |
Journal or Proceedings Title | Proceedings of the 18th World IMACS Congress and International Congress on Modelling and Simulation (MODSIM09) |
Journal Citation | pp. 2646 - 2650 |
Number of Pages | 5 |
Year | 2009 |
Publisher | Modelling and Simulation Society of Australia and New Zealand |
Place of Publication | Australia |
ISBN | 9780975840078 |
Web Address (URL) of Conference Proceedings | https://mssanz.org.au/modsim09/index.html |
Conference/Event | 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation |
Event Details | 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation Parent IMACS World Congress and MODSIM International Congress on Modelling and Simulation Delivery In person Event Date 13 to end of 17 Jul 2009 Event Location Cairns, Australia |
Abstract | It has been hypothesised that in a warmer world, positive Indian Ocean Dipole (pIOD) events, which refer to a phase with low sea surface temperature (SST) anomalies in the eastern Indian Ocean (IO) and warm anomalies in the west, may become more frequent or more intense, resulting in more drought-like conditions across much of Australia. Indeed, in 2006-2007 two consecutive pIOD events occurred in conjunction with a 2007 La Niña event causing wide-spread drought across eastern Australia. Significant improvements have been achieved in the simulation of Indo-Pacific variability, such as the IOD and the El Niño-Southern Oscillation (ENSO) by climate models used in the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC-AR4). In this paper, we discuss the dynamics behind Australian seasonal rainfall teleconnections associated with two-consecutive pIOD events and with one occurring in a La Niña year, using outputs from IPCC-AR4 climate models. The results show that only six out of 24 models produce at least one such combinations during the latter part of their 20th Century simulation, and that the associated evolution of rainfall anomalies are reasonably simulated. © MODSIM 2009.All rights reserved. |
Keywords | Indian Ocean Dipole; Indo-Pacific variability; IPCC-AR4; Rainfall teleconnections |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 370105. Atmospheric dynamics |
370202. Climatology | |
Byline Affiliations | Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia |
https://research.usq.edu.au/item/z09zy/how-well-do-ipcc-ar4-models-simulate-australian-rainfall-teleconnections-during-two-consecutive-positive-indian-ocean-dipole-events
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