Journal article

Large-Scale Influences on the Evolution of Winter Subtropical Maritime Cyclones Affecting Australia's East Coast

Stuart A Browning, Ian D Goodwin

Monthly Weather Review | AMER METEOROLOGICAL SOC | Published : 2013


Subtropical maritime low pressure systems frequently impact Australia's eastern seaboard. Closed circulation lows in the Tasman Sea region are termed East Coast Cyclones (ECC); they can evolve in a range of climatic environments and have proven most destructive during the late autumn-winter period. Using criteria based on pressure gradients, inferred wind field, and duration, an objectively determined database of ECC occurrences is established to explore large-scale influences on ECC evolution. Subclassification based on evolutionary trajectory reveals two dominant storm types during late autumn-winter: easterly trough lows (ETL) and southern secondary lows (SSL). Synoptic composites are use..

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Funding Acknowledgements

This research was funded in part by a research grant to Ian D. Goodwin from the New South Wales Office of Environment and Heritage (NSW OEH) and the New South Wales Environmental Trust. The paper is a contribution to the Eastern Seaboard Climate Change Initiative on East Coast Lows (ESCCI-ECL), and the research project: "Extending the extreme East Coast Low climatology over the past millennium." Stuart A. Browning was supported by an MQRES grant from Macquarie University and a student grant from NSW OEH. We also thank the anonymous reviewers whose constructive suggestions improved this paper.