Impact of atmospheric circulation on the rainfall-temperature relationship in Australia
AuthorMagan, B; Kim, S; Wasko, C; Barbero, R; Moron, V; Nathan, R; Sharma, A
Source TitleEnvironmental Research Letters
PublisherIOP PUBLISHING LTD
Document TypeJournal Article
CitationsMagan, B., Kim, S., Wasko, C., Barbero, R., Moron, V., Nathan, R. & Sharma, A. (2020). Impact of atmospheric circulation on the rainfall-temperature relationship in Australia. ENVIRONMENTAL RESEARCH LETTERS, 15 (9), https://doi.org/10.1088/1748-9326/abab35.
Access StatusOpen Access
Open Access URLhttps://doi.org/10.1088/1748-9326/abab35
Anthropogenic climate change is leading to the intensification of extreme rainfall due to an increase in atmospheric water holding capacity at higher temperatures as governed by the Clausius-Clapeyron (C-C) relationship. However, the rainfall-temperature sensitivity (termed scaling) often deviates from the C-C relationship. This manuscript uses classifications prescribed by regional-scale atmospheric circulation patterns to investigate whether deviations from the C-C relationship in tropical Australia can be explained by differing weather types (WT). We show that the rainfall-temperature scaling differs depending on the WTs, with the difference increasing with rainfall magnitude. All monsoonal WTs have similar scaling, in excess of the C-C relationship, while trade winds (the driest WTs) result in the greatest scaling, up to twice that of the C-C relationship. Finally, we show the scaling for each WT also varies spatially, illustrating that both local factors and the WT will contribute to the behaviour of rainfall under warming.
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