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Climatic Change

, Volume 111, Issue 3–4, pp 903–922 | Cite as

Understanding and partitioning future climates for Australian regions from CMIP3 using ocean warming indices

  • Ian Geoffrey Watterson
Article

Abstract

The patterns of large-scale climate change over the 21st century simulated by 23 CMIP3 global climate models are analyzed to provide understanding of the range of projected temperature T and precipitation P changes for Australia published in 2007. Means of change, standardized by the global warming, within each of 11 regions are calculated for each model. Correlations between regions across the 23 models indicate that the changes are rather coherent across much of the mainland. The all-Australian average changes are also well correlated with a pattern of tropical sea surface temperatures. A Pacific-Indian Dipole index, representing this pattern, correlates strongly with Australian P. It also correlates well with variables in Southeast Asia. The global warming itself correlates well with Australian warming. These two indices of large-scale ocean warming are used to partition the 23 models into four representative future climates. For Australia overall, these can be described as much warmer and drier, much warmer, warmer and drier, and warmer. The four climates span much of the range of the earlier Australian projections over most of the continent. Further, they may be reproduced by a downscaling model forced with the SST anomalies. An assessment of the realism of the ocean pattern changes has the potential to reduce the uncertainty of projections, both for Australia and beyond.

Keywords

Indian Ocean Global Warming Indian Ocean Dipole Southern Annular Mode CMIP3 Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work contributes to the Australian Climate Change Science Program. Much of this work was motivated and developed through discussions with Penny Whetton.

Supplementary material

10584_2011_166_MOESM1_ESM.pdf (2 mb)
(PDF 2.03 MB)

References

  1. Cai W, Hendon HH, Meyers G (2005) Indian Ocean dipolelike variability in the CSIRO Mark 3 coupled climate model. J Clim 18:1449–1468CrossRefGoogle Scholar
  2. CSIRO (2010) Climate variability and change in south-eastern Australia: a synthesis of findings from phase 1 of the South Eastern Australian Climate Initiative (SEACI). Technical report, CSIRO Australia. Available www.seaci.org
  3. CSIRO, Bureau of Meteorology (2007) Climate change in Australia. Technical report, CSIRO, Melbourne. Available www.climatechangeinaustralia.gov.au
  4. Dommenget D (2009) The ocean’s role in continental climate variability and change. J Clim 22:4939–4952CrossRefGoogle Scholar
  5. Frederiksen CS, Balgovind RC (1994) The influence of the Indian Ocean/Indonesian SST gradient on the Australian winter rainfall and circulation in an atmospheric GCM. Q J Royal Meteorol Soc 120:923–952CrossRefGoogle Scholar
  6. Grose MR, Barnes-Keoghan I, Corney SP, White CJ, Holz GK, Bennett JB, Gaynor SM, Bindoff NL (2010) Climate Futures for Tasmania: general climate impacts. Tech. rep., Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, Tasmania. http://www.climatechange.tas.gov.au/government_action/climate_futures
  7. McGregor J, Nguyen K (2008) Dynamical downscaling of coupled model historical runs. Project Report 1.5.4, South Eastern Australian Climate Initiative, MDBA, Australia. http://www.seaci.org/docs/reports/M154_FR07.pdf
  8. Meehl G, Stocker T, Collins W, Friedlingstein P, Gaye A, Gregory J, Kitoh A, Knutti R, Murphy J, Noda A, Raper S, Watterson I, Weaver A, Zhao ZC (2007a) Global climate projections. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt K, Tignor M, Miller H (eds) Climate change 2007. The Physical Science Basis, Cambridge University Press, pp 747–845Google Scholar
  9. Meehl GA, Covey C, Delworth T, Latif M, McAvaney B, Mitchell JFB, Stouffer RJ, Taylor KE (2007b) The WCRP CMIP3 multi-model dataset: a new era in climate change research. Bull Am Meteorol Soc 88:1383–1394CrossRefGoogle Scholar
  10. Risbey JS, Pook MJ, McIntosh PC, Wheeler MC, Hendon HH (2009) On the remote drivers of rainfall variability in Australia. Mon Weather Rev 3233–3253. doi: 10.1175/2009MWR2861.1
  11. Rotstayn LD et al (2007) Have Australian rainfall and cloudiness increased due to the remote effects of Asian anthropogenic aerosols? J Geophys Res 112. doi: 10.1029/2006JD007712
  12. Rowell DP (2009) Projected midlatitude continental summer drying: North America versus Europe. J Clim 22:2813–2833CrossRefGoogle Scholar
  13. Shi G, Ribbe J, Cai W, Cowan T (2008) An interpretation of Australian rainfall projections. Geophys Res Lett 35:L02702. doi: 10.1029/2007GL032436 CrossRefGoogle Scholar
  14. Smith IN (2004) An assessment of recent trends in Australian rainfall. Aust Meteorol Mag 53:163–173Google Scholar
  15. Smith I, Chandler E (2010) Refining rainfall projections for the Murray-Darling Basin of south-east Australia -the effect of sampling model results based on performance. Clim Change 102:377–393. doi: 10.1007/s10584-009-9757-1 CrossRefGoogle Scholar
  16. Timbal B, Arblaster J, Power S (2006) Attribution of the late-twentieth-century rainfall decline in southwest Australia. J Clim 19:2046–2062CrossRefGoogle Scholar
  17. Watterson IG (2008) Calculation of probability density functions for temperature and precipitation change under global warming. J Geophys Res 113:d12106. doi: 10.1029/2007JD009254 CrossRefGoogle Scholar
  18. Watterson IG (2009) Components of rainfall and temperature anomalies and change associated with modes of the Southern Hemisphere. Int J Climatol 29:809–826. doi: 10.1002/joc.1772 CrossRefGoogle Scholar
  19. Watterson IG (2010) Relationships between southeastern Australian rainfall and sea surface temperatures examined using a climate model. J Geophys Res 115:d10108. doi: 10.1029/2009JD012120 CrossRefGoogle Scholar
  20. Watterson IG, McGregor JG, Nguyen KC (2008) Changes in extreme temperatures of Australasian summer simulated by CCAM under global warming, and the roles of winds and land-sea contrasts. Aust Meteor Mag 57:195–212Google Scholar
  21. Whetton P, Macadam I, Bathols J, O’Grady J (2007) Assessment of the use of current climate patterns to evaluate regional enhanced greenhouse response of climate models. Geophys Res Lett 34:l14701. doi: 10.1029/2007GL030025 CrossRefGoogle Scholar
  22. Whetton P, Hennessy K, Bates B, Kent D (2010) Regional projections and model evaluation: potential benefits of ‘representative future regional climates’. In: Stocker T, Qin D, Plattner GK, Midgley PM (eds) IPCC Expert Meeting on Assessing and Combining multi model climate projections. IPCC Working Group I Technical Support Unit, Univ. of Bern, Switzerland, pp 105–107Google Scholar
  23. Yamane T (1967) Statistics: an introductory analysis. Harper InternationalGoogle Scholar

Copyright information

© UK Crown 2011

Authors and Affiliations

  1. 1.CSIRO Marine and Atmospheric ResearchAspendaleAustralia

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