Abstract: Interannual variability in the frequency of atmospheric blocking events over the southern Pacific Ocean is analyzed in terms of variations in the El Niño?Southern Oscillation (ENSO) cycle, using a 16-yr record of Southern ...

Abstract: Relationships on the seasonal timescale between Southern Hemisphere 500-hPa height, sea surface temperature, and Antarctic sea ice variability have been investigated using NCEP?NCAR reanalyses, NCEP sea surface temperatures, ...

Abstract: Long time series of reanalyses, from NCEP?NCAR and from ECMWF, are used to investigate the occurrence of persistent positive anomalies (PPAs) in the 500-hPa geopotential height field over the Southern Hemisphere extratropics ...

Abstract: In terms of the effects of future climate change upon society, some of the most important parameters to estimate are associated with changing risks of extreme rainfall events, both floods and droughts. However, such aspects ...

Abstract: A statistical scheme for predicting New Zealand seasonal-mean temperatures at the beginning of each season has been developed. It is significantly more skillful (in terms of the percentage explained variance) than earlier ...

Abstract: ntraseasonal relationships between Antarctic sea ice and atmospheric circulation have been investigated using a 29-yr record of pentad-mean Antarctic sea ice concentration and Southern Hemisphere 500-hPa height fields. ...

Abstract: The frequency of persistent high-latitude ridging events (commonly referred to as blocking) over the North Pacific?Alaskan region is investigated using a 44-winter record of daily 500-mb height fields. The winters are ...

Abstract: ynoptic classifications over the Southern Ocean in the Ross Sea region of Antarctica (50°S?Antarctic coast, 150°E?90°W) have been derived from NCEP reanalysis data (1979?2011), producing a set of six synoptic types for the ...