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Attribution of exceptional mean sea level pressure anomalies south of Australia in August 2014


Grose, MR and Black, MT and Risbey, JS and Karoly, DJ, Attribution of exceptional mean sea level pressure anomalies south of Australia in August 2014, American Meteorological Society. Bulletin, 96, (12) pp. S158-S162. ISSN 0003-0007 (2015) [Refereed Article]


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DOI: doi:10.1175/BAMS-D-15-00116.1


August 2014 saw very strong monthly positive mean sea level pressure (MSLP) anomalies and intense daily to multiday MSLP events south of Australia and in the Tasman Sea (Fig. 32.1a). To the west of Tasmania there were monthly anomalies of over 10 hPa (2.4 standard deviations from the mean), the highest on record since 1979 using ERA-Interim reanalysis (ERAint; Dee et al. 2011), or from 1850 using the Hadley Centre Sea Level Pressure analysis (HadSLP2r; Allan and Ansell 2006). Atmospheric blocking west of Tasmania on 10–15 August (Figs. 32.1b,c) featured the highest daily August MSLP anomaly in either record in that location. Blocking was seen in the south Tasman Sea later in the month, including the highest daily MSLP anomaly on record at that location. The spatial distribution of the monthly MSLP anomalies resembles a wave-3 pattern (Fig. 32.1a).

Item Details

Item Type:Refereed Article
Keywords:Earth atmosphere, meteorology
Research Division:Earth Sciences
Research Group:Climate change science
Research Field:Climatology
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Climate variability (excl. social impacts)
UTAS Author:Grose, MR (Dr Michael Grose)
UTAS Author:Risbey, JS (Dr James Risbey)
ID Code:119200
Year Published:2015
Web of Science® Times Cited:6
Deposited By:Oceans and Cryosphere
Deposited On:2017-07-27
Last Modified:2017-08-01
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