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Climate 2013, 1(3), 120-147; doi:10.3390/cli1030120
Article

Exploring Aerosol Effects on Rainfall for Brisbane, Australia

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Received: 23 April 2013 / Revised: 30 July 2013 / Accepted: 7 October 2013 / Published: 28 October 2013
(This article belongs to the Special Issue Emission Impacts on Aerosol-Climate Feedbacks)
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Abstract

The majority of studies assessing aerosol effects on rainfall use coarse spatial scale (1° latitude/longitude or more) and multi-seasonal or decadal data sets. Here, we present results from a spatial correlation of aerosol size distribution and rain rate for selected stratiform and cumuliform precipitation events. The chemistry transport version of the Weather Research and Forecasting model was used to estimate aerosol parameters during rain events Aerosol maps were then compared with observations of rainfall using geostatistics for the first time. The cross-variogram analysis showed that anthropogenic aerosol was associated with areas of less intense rain within the stratiform system studied. For cumuliform systems, cross-variogram analysis found that anthropogenic emissions may be associated with enhanced rain downwind of aerosol emissions. We conclude that geostatistics provides a promising new technique to investigate relationships between aerosols and rainfall at spatial scales of 1 km which complements more commonly used methods to study aerosol effects on rainfall.
Keywords: natural and anthropogenic emission; spatial analysis; geostatistics natural and anthropogenic emission; spatial analysis; geostatistics
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hewson, M.; McGowan, H.; Phinn, S.; Peckham, S.; Grell, G. Exploring Aerosol Effects on Rainfall for Brisbane, Australia. Climate 2013, 1, 120-147.

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