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    Impact of atmospheric circulation on the rainfall-temperature relationship in Australia

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    Author
    Magan, B; Kim, S; Wasko, C; Barbero, R; Moron, V; Nathan, R; Sharma, A
    Date
    2020-09-01
    Source Title
    Environmental Research Letters
    Publisher
    IOP PUBLISHING LTD
    University of Melbourne Author/s
    Wasko, Conrad; Nathan, Roderic
    Affiliation
    Infrastructure Engineering
    Metadata
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    Document Type
    Journal Article
    Citations
    Magan, 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 Status
    Open Access
    URI
    http://hdl.handle.net/11343/264183
    DOI
    10.1088/1748-9326/abab35
    Open Access URL
    https://doi.org/10.1088/1748-9326/abab35
    Abstract
    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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