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Bradfield Lyon

transports into the Greater Horn as a result of a classic Gill–Matsuno-type response to the diabatic heating associated with the enhanced convection. They reported that the Indian Ocean warming likely has an anthropogenic component such that, despite the consensus of climate projections for a wetter Greater Horn due to anthropogenic forcing, the rainfall response to that forcing may in fact be of the opposite sign. A subsequent paper by Williams and Funk (2011) argued that the increasing tropical

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Wenju Cai, Ariaan Purich, Tim Cowan, Peter van Rensch, and Evan Weller

teleconnection is an equatorially trapped, deep baroclinic response to the diabatic convective heating anomalies induced by tropical SST anomalies ( Gill 1980 ). The atmospheric manifestation of this direct tropical teleconnection is the Southern Oscillation, of which the impact is mainly confined to near-tropical latitudes and can affect eastern and northeastern Australian rainfall in most seasons except for April–May ( Figs. 2a–d ). The tropical diabatic heating anomalies also excite equivalent

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Mathew Barlow, Benjamin Zaitchik, Shlomit Paz, Emily Black, Jason Evans, and Andrew Hoell

forcing While there is not yet a complete understanding of the dynamical pathways by which tropical variability can influence the region, there have been several studies of the influence of tropical convection occurring over a region extending from the eastern Indian Ocean to the western Pacific Ocean. Enhanced tropical Indo–west Pacific Ocean convection results in diabatic heating increases, which excites baroclinic ( Barlow et al. 2002 , 2005 , 2007 ; Barlow 2011 ; Hoell et al. 2012 , 2013

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