Abstract The impact of radiative interactions on tropical cyclone (TC) climatology is investigated using a global, TC-permitting general circulation model (GCM) with realistic boundary conditions. In this model, synoptic-scale are suppressed by overwriting the model-generated atmospheric cooling rates their monthly varying climatological values. When suppressed, global TC frequency significantl...

Michael J. Pook*, James S. Risbey, Caroline C. Ummenhofer, Peter R. Briggs and Timothy J. Cohen 1 Commonwealth Scientific and Industrial Research Organisation Oceans and Atmosphere, Hobart, TAS, Australia 2 Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, USA 3 Commonwealth Scientific and Industrial Research Organisation Oceans and Atmosphere, Canberra,...

One of the main drivers for this project is the requirement to complement other high-quality surface data-sets with surface wind data for use in climate change detection and attribution studies. The high-quality data may also be used to analyse trends in storminess. Investigations highlighted the following three issues: Over the last two decades Automatic Weather Stations (AWS) have been instal...

The relative timing of late Quaternary glacial advances in mid-latitude (40–55 S) mountain belts of the Southern Hemisphere (SH) has become a critical focus in the debate on global climate teleconnections. On the basis of glacial data from New Zealand (NZ) and southern South America it has been argued that interhemispheric synchrony or asynchrony of Quaternary glacial events is due to Northern ...

Twenty-eight years of NCEP–NCAR reanalysis data are employed in a composite analysis of the structure and evolution of the large-scale circulation associated with rapid, subseasonal, westward retractions of the Northern Hemisphere Pacific jet. Nineteen Pacific jet retractions are identified in the dataset. The salient characteristics of these transitions are presented, emphasizing the structure...

Abstract Given the ability of recurving Atlantic tropical cyclones (TCs) to disturb amplitude Rossby waves on extratropical jet, this study investigates whether predictability synoptic-scale flow is significantly modified from climatology downstream and after TC recurvature events. Predictability evaluated as standard deviation isentropic potential vorticity among a 50-member ensemble compared ...