Arctic Oscillation With Height (AO)


To identify the leading teleconnection patterns in the atmospheric circulation, Emperical Orthogonal Function (EOF) was applied to the monthly mean 1000-hPa (700-hPa) height anomalies poleward of 20° latitude for the Northern (Southern) Hemisphere [http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/history/method.shtml].