Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina

J Whelan; J S Frederiksen

doi:10.21914/anziamj.v56i0.9353

Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina

J Whelan, J S Frederiksen

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research

Abstract

We examine the synoptics and the role of different classes of dynamical disturbances, from both observations and ensemble simulations, during of one of Australia's most severe flooding events in January 2011. We analyse ensemble simulations using the CSIRO M3L general circulation spectral model. Using wavenumber extraction techniques and dynamical mode analyses, we note the collision and convective coupling of Kelvin waves and the Madden--Julian oscillation in the Australian monsoonal region. Model simulations and the dynamical analyses are consistent with the synoptic situation, and provide a more complete explanation for the extensive precipitation impacts over Australia during January 2011.

Original language	English
Title of host publication	Proceedings of the 17th Biennial Computational Techniques and Applications Conference
Editors	Markus Hegland, Jason Sharples
Place of Publication	Canberra ACT Australia
Publisher	Cambridge University Press
Pages	C179-C193
Number of pages	15
Volume	56
DOIs	https://doi.org/10.21914/anziamj.v56i0.9353
Publication status	Published - 2015
Externally published	Yes
Event	Computational Techniques and Applications Conference 2014 - Australian National University, Canberra, Australia Duration: 1 Dec 2014 → 3 Dec 2014 Conference number: 17th http://maths.anu.edu.au/events/ctac-2014

Publication series

Name	ANZIAM Journal
Publisher	Cambridge University Press
Volume	56
ISSN (Print)	1446-1811
ISSN (Electronic)	1446-8735

Conference

Conference	Computational Techniques and Applications Conference 2014
Abbreviated title	CTAC 2014
Country/Territory	Australia
City	Canberra
Period	1/12/14 → 3/12/14
Internet address	http://maths.anu.edu.au/events/ctac-2014

Keywords

climate modeling
normal modes
instabilities
ENSO

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.21914/anziamj.v56i0.9353

117374131-oaFinal published version, 964 KB

Cite this

Whelan, J., & Frederiksen, J. S. (2015). Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina. In M. Hegland, & J. Sharples (Eds.), Proceedings of the 17th Biennial Computational Techniques and Applications Conference (Vol. 56, pp. C179-C193). (ANZIAM Journal; Vol. 56). Cambridge University Press. https://doi.org/10.21914/anziamj.v56i0.9353

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abstract = "We examine the synoptics and the role of different classes of dynamical disturbances, from both observations and ensemble simulations, during of one of Australia's most severe flooding events in January 2011. We analyse ensemble simulations using the CSIRO M3L general circulation spectral model. Using wavenumber extraction techniques and dynamical mode analyses, we note the collision and convective coupling of Kelvin waves and the Madden--Julian oscillation in the Australian monsoonal region. Model simulations and the dynamical analyses are consistent with the synoptic situation, and provide a more complete explanation for the extensive precipitation impacts over Australia during January 2011.",

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Whelan, J & Frederiksen, JS 2015, Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina. in M Hegland & J Sharples (eds), Proceedings of the 17th Biennial Computational Techniques and Applications Conference. vol. 56, ANZIAM Journal, vol. 56, Cambridge University Press, Canberra ACT Australia, pp. C179-C193, Computational Techniques and Applications Conference 2014, Canberra, Australia, 1/12/14. https://doi.org/10.21914/anziamj.v56i0.9353

Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina. / Whelan, J; Frederiksen, J S.
Proceedings of the 17th Biennial Computational Techniques and Applications Conference. ed. / Markus Hegland; Jason Sharples. Vol. 56 Canberra ACT Australia: Cambridge University Press, 2015. p. C179-C193 (ANZIAM Journal; Vol. 56).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research

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AB - We examine the synoptics and the role of different classes of dynamical disturbances, from both observations and ensemble simulations, during of one of Australia's most severe flooding events in January 2011. We analyse ensemble simulations using the CSIRO M3L general circulation spectral model. Using wavenumber extraction techniques and dynamical mode analyses, we note the collision and convective coupling of Kelvin waves and the Madden--Julian oscillation in the Australian monsoonal region. Model simulations and the dynamical analyses are consistent with the synoptic situation, and provide a more complete explanation for the extensive precipitation impacts over Australia during January 2011.

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KW - normal modes

KW - instabilities

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Whelan J, Frederiksen JS. Simulations of Australian extreme rainfall and circulation during the January 2011 La Nina. In Hegland M, Sharples J, editors, Proceedings of the 17th Biennial Computational Techniques and Applications Conference. Vol. 56. Canberra ACT Australia: Cambridge University Press. 2015. p. C179-C193. (ANZIAM Journal). doi: 10.21914/anziamj.v56i0.9353