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Anomalous Rainfall over Southwest Western Australia Forced by Indian Ocean Sea Surface Temperatures
- Article from:
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Journal of Climate
- Article date:
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October 1, 2008
- Author:
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Copyright informationCopyright American Meteorological Society Oct 1, 2008. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
The potential impact of Indian Ocean sea surface temperature (SST) anomalies in modulating midlatitude precipitation across southern and western regions of Australia is assessed in a series of atmospheric general circulation model (AGCM) simulations. Two sets of AGCM integrations
forced with a seasonally evolving characteristic dipole pattern in Indian Ocean SST consistent with observed "dry year" (P^sub DRY^) and "wet year" (P^sub WET^) signatures are shown to induce precipitation changes across western regions of Australia. Over Western Australia, a significant shift occurs in the winter and annual rainfall frequency with the distribution becoming skewed toward less (more) ...
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