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This study examines regional atmospheric circulation changes associated with a reversal in the sign of the relationship between the Southern Annular Mode (SAM) and near-surface temperatures at Halley station, East Antarctica, during the 1980s. We show that the key factor affecting the regional SAM–temperature relationship (STR) is the relative magnitude of two climatological low pressure centres to...
Atmospheric and oceanic reanalysis data of the past 60 years are visualized by time–latitude cross sections which inform about temporal and latitudinal variability, changes, and meridional circulation of the climate system on time scales from years to decades. The diagrams ease the understanding of climate dynamics in a similar way as the Hovmöller diagram has clarified the zonal propagation of synoptic-scale...
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