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Journal of Southern Hemisphere Earth Systems Science Journal of Southern Hemisphere Earth Systems Science SocietyJournal of Southern Hemisphere Earth Systems Science Society
A journal for meteorology, climate, oceanography, hydrology and space weather focused on the southern hemisphere
RESEARCH ARTICLE (Open Access)

Seasonal climate summary for Australia and the southern hemisphere (summer 2018–19): extreme heat and flooding prominent

Ben S. Hague https://orcid.org/0000-0002-4931-8111 A B
+ Author Affiliations
- Author Affiliations

A Bureau of Meteorology, GPO Box 1289, Melbourne, Vic. 3001, Australia. Email: ben.hague@bom.gov.au

B Monash University, School of Earth, Atmosphere and Environment, Clayton, Vic., Australia.

Journal of Southern Hemisphere Earth Systems Science 71(1) 147-158 https://doi.org/10.1071/ES20009
Submitted: 22 September 2020  Accepted: 27 December 2020   Published: 2 February 2021

Journal Compilation © BoM 2021 Open Access CC BY-NC-ND

Abstract

This is a summary of the southern hemisphere atmospheric circulation patterns and meteorological indices for summer 2018–19; an account of seasonal rainfall and temperature for the Australian region is also provided. January 2019 was Australia’s hottest month on record, nearly 1°C warmer than any previous month. Impacts of heavy rain and floods were reported in Australia, New Zealand and South American nations. Extreme terrestrial and maritime heatwaves occurred in and around Australia and New Zealand. Case studies of the Australian heatwave, Queensland floods in January and February, and a tide-driven coastal inundation event are considered.

Keywords: coastal inundation, extreme heat, flooding, heatwave, neutral ENSO season, positive OLR anomalies, summer 2018–19.


References

Blunden, J., and Arndt, D. S. (2020). State of the Climate in 2019. Bull. Amer. Meteor. Soc. 101, S1–S429.
State of the Climate in 2019.Crossref | GoogleScholarGoogle Scholar |

Bureau of Meteorology (2019a). Monthly Weather Review Australia December 2018. Bureau of Meteorology, Melbourne. Available at http://www.bom.gov.au/climate/mwr/aus/mwr-aus-201812.pdf

Bureau of Meteorology (2019b). Tropical Low 13U – Townsville and northwest Queensland floods. Bureau of Meteorology, Brisbane. Available at http://www.bom.gov.au/cyclone/history/Tropical_Low_13U.pdf

Bureau of Meteorology (2019c). North Queensland Monsoon Flood Report. Bureau of Meteorology, Melbourne. Available at http://www.bom.gov.au/qld/flood/fld_reports/QLD_Monsoon_Trough_floods.pdf

Bureau of Meteorology (2019d). Special Climate Statement 69— an extended period of heavy rainfall and flooding in tropical Queensland. Bureau of Meteorology, Melbourne. Available at http://www.bom.gov.au/climate/current/statements/scs69.pdf

Bureau of Meteorology (2019e). Special Climate Statement 68—widespread heatwaves during December 2018 and January 2019. Bureau of Meteorology, Melbourne. Available at http://www.bom.gov.au/climate/current/statements/scs68.pdf

Bureau of Meteorology (2019f). Monthly Weather Review Australia January 2019. Bureau of Meteorology, Melbourne. Available at http://www.bom.gov.au/climate/mwr/aus/mwr-aus-201901.pdf

Bureau of Meteorology and CSIRO (2020). State of the Climate 2020. Commonwealth of Australia. Available at http://www.bom.gov.au/state-of-the-climate/documents/State-of-the-Climate-2020.pdf

Donald, A., Meinke, H., Power, B., Wheeler, M., and Ribbe, J. (2004). Forecasting with the Madden-Julian Oscillation and the applications for risk management. In ‘International Crop Science Congress (ICSC 2004): New Directions for a Diverse Planet, 26 September–1 October 2004, Brisbane, Australia’. Available at http://www.cropscience.org.au/icsc2004/poster/2/6/1362_donalda.htm

Fetterer, F., Knowles, K., Meier, W. N., Savoie, M., and Windnagel., A. K. (2017). Sea Ice Index, updated daily. Version 3. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center10.7265/N5K072F8. [Accessed 10/09/2020].

Hague, B. S., Murphy, B. F., Jones, D. A., and Taylor, A. J. (2019). Developing impact-based thresholds for coastal inundation from tide gauge observations. J. South. Hemisph. Earth Syst. Sci. 69, 252–272.
Developing impact-based thresholds for coastal inundation from tide gauge observations.Crossref | GoogleScholarGoogle Scholar |

Hobday, A. J., Alexander, L. V., Perkins, S. E., et al. (2016). A hierarchical approach to defining marine heatwaves. Prog. Oceanogr. 141, 227–238.
A hierarchical approach to defining marine heatwaves.Crossref | GoogleScholarGoogle Scholar |

Huang, B., Menne, M. J., Boyer, T., et al. (2020). Uncertainty estimates for sea surface temperatures and land surface air temperatures in NOAAGlobalTemp version 5. J. Climate 33, 1351–1379.
Uncertainty estimates for sea surface temperatures and land surface air temperatures in NOAAGlobalTemp version 5.Crossref | GoogleScholarGoogle Scholar |

IPCC (2014). Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (Eds R. K. Pachauri, and L. A. Meyer.) (IPCC: Geneva, Switzerland).

Kanamitsu, M., Ebisuzaki, W., Woollen, J., Yang, S.-K., Hnilo, J. J., Fiorino, M., and Potter, G. L. (2002). NCEP-DOE AMIPII Reanalysis (R-2). Bull. Amer. Meteor. Soc. 83, 1631–1643.
NCEP-DOE AMIPII Reanalysis (R-2).Crossref | GoogleScholarGoogle Scholar |

Kuleshov, Y., Qi, L., Fawcett, R., and Jones, D. (2009). Improving preparedness to natural hazards: Tropical cyclone prediction for the Southern Hemisphere. Adv. Geosci. 12, 127–143.
Improving preparedness to natural hazards: Tropical cyclone prediction for the Southern Hemisphere.Crossref | GoogleScholarGoogle Scholar |

Lenssen, N. J. L., Schmidt, G. A., Hansen, J. E., Menne, M. J., Persin, A., Ruedy, R., and Zyss, D. (2019). Improvements in the GISTEMP uncertainty model. J. Geophys. Res. Atmos. 124, 6307–6326.
Improvements in the GISTEMP uncertainty model.Crossref | GoogleScholarGoogle Scholar |

Madden, R. A., and Julian, P. R. (1971). Detection of a 40-50 day oscillation in the zonal wind in the tropical Pacific. J. Atmos. Sci. 28, 702–708.
Detection of a 40-50 day oscillation in the zonal wind in the tropical Pacific.Crossref | GoogleScholarGoogle Scholar |

Madden, R. A., and Julian, P. R. (1972). Description of global-scale circulation cells in the tropics with a 40-50 day period. J. Atmos. Sci. 29, 1109–1123.
Description of global-scale circulation cells in the tropics with a 40-50 day period.Crossref | GoogleScholarGoogle Scholar |

Madden, R. A., and Julian, P. R. (1994). Observations of the 40-50 day tropical oscillation: a review. Mon. Wea. Rev. 122, 814–837.
Observations of the 40-50 day tropical oscillation: a review.Crossref | GoogleScholarGoogle Scholar |

Morice, C. P., Kennedy, J. J., Rayner, N. A., and Jones, P. D. (2012). Quantifying uncertainties in global and regional temperature change using an ensemble of observational estimates: the HadCRUT4 dataset. J. Geophys. Res. 117, D08101.
Quantifying uncertainties in global and regional temperature change using an ensemble of observational estimates: the HadCRUT4 dataset.Crossref | GoogleScholarGoogle Scholar |

NIWA (2019). New Zealand Climate Summary: Summer 2018–19. NIWA, Auckland. Available at https://niwa.co.nz/sites/niwa.co.nz/files/Climate_Summary_Summer_2018–19-NIWA.pdf

Ray, R. D., and Foster, G. (2016). Future nuisance flooding at Boston caused by astronomical tides alone. Earth’s Future 4, 578–597.
Future nuisance flooding at Boston caused by astronomical tides alone.Crossref | GoogleScholarGoogle Scholar |

Schlegel, R. W. (2020). Marine Heatwave Tracker. Available at http://www.marineheatwaves.org/tracker10.5281/ZENODO.3787872

South African Weather Service (2019). Annual Climate Summary for South Africa 2018. South African Weather Service, Pretoria. Available at https://www.weathersa.co.za/Documents/Corporate/Annual%20Climate%20Summary%202018%20FINAL.pdf

South African Weather Service (2020). Annual State of the Climate 2019. South African Weather Service, Pretoria. Available at https://www.weathersa.co.za/Documents/Corporate/Annual%20State%20of%20the%20Climate%202019.pdf

Stephenson, A. G. (2016). Harmonic Analysis of Tides Using TideHarmonics. Available at https://CRAN.R-project.org/package=TideHarmonics

Troup, A. (1965). The Southern Oscillation. Quart. J. Roy. Meteor. Soc. 91, 490–506.
The Southern Oscillation.Crossref | GoogleScholarGoogle Scholar |

Wheeler, M., and Hendon, H. (2004). An All-Season Real-Time Multivariate MJO Index: Development of an Index for Monitoring and Prediction. Mon. Wea. Rev. 132, 1917–32.
An All-Season Real-Time Multivariate MJO Index: Development of an Index for Monitoring and Prediction.Crossref | GoogleScholarGoogle Scholar |

World Meteorological Organisation (2020). WMO Statement on the State of the Global Climate in 2019. WMO No. 1248. World Meteorological Organisation, Geneva. Available at https://library.wmo.int/doc_num.php?explnum_id=10211#:~:text=The%20global%20mean%20temperature%20for,also%20the%20warmest%20on%20record.