A climatology of Australian heat low events

Article


Lavender, Sally L.. 2017. "A climatology of Australian heat low events." International Journal of Climatology. 37 (1), pp. 534-539. https://doi.org/10.1002/joc.4692
Article Title

A climatology of Australian heat low events

ERA Journal ID1969
Article CategoryArticle
Authors
AuthorLavender, Sally L.
Journal TitleInternational Journal of Climatology
Journal Citation37 (1), pp. 534-539
Number of Pages6
Year2017
PublisherJohn Wiley & Sons
Place of PublicationUnited Kingdom
ISSN0899-8418
1097-0088
Digital Object Identifier (DOI)https://doi.org/10.1002/joc.4692
Web Address (URL)https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.4692
Abstract

Heat lows are a persistent feature over northern Australia between the Austral late spring and early autumn. The first ever multi-decadal climatology of individual Australian heat lows is presented here, based on an automated detection scheme applied to 35 years of ERA-Interim reanalysis data. Australian heat lows occur most frequently over the northwest of the continent and exhibit a pronounced seasonal cycle in both their frequency and intensity. Heat lows occur in response to surface heating and are most common over Australia during December and January when they can be detected on 95% of days. These months are also when the heat lows are most intense in terms of the central pressure and low-level cyclonic circulation. A composite heat low based on all heat low detections enables the three-dimensional structure of the heat lows to be analysed. The shallow nature of the heat low is clearly evident, and the structure is consistent with heat low observations in other regions of the globe. The similarity between the results presented here and the results of previous modelling studies as well as possible links between Australian heat lows and local weather is discussed. © 2016 Royal Meteorological Society

KeywordsAustralia; circulation; climate; heat low; boiler circulation; earth atmosphere; automated detection; cyclonic circulation; Northern Australia; persistent feature; three-dimensional structure; climatology; atmospheric circulation; autumn; climate modeling; heat flow; modeling; surface flux; three-dimensional modeling
ANZSRC Field of Research 2020370202. Climatology
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Byline AffiliationsCommonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
Institution of OriginUniversity of Southern Queensland
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