Temperatures and precipitation totals over the Russian Far East and Eastern Siberia: long-term variability and its links to teleconnection indices

摘要

The present study examines the spatial-temporal regime of the mean monthlytemperature (MMT) and monthly precipitation (MPT) anomalies over the RussianFar East and Eastern Siberia for the period 1949–2003. The original datawere analyzed spatially by means of complex principal component analysis andtemporally by means of the maximum entropy method and traditional Fourierspectral analysis. The interannual variability in these anomalies can berepresented by the single dominant modes. These dominant modes oscillatewith periods of about 2–3 yr and 6–8 yr that are accompanied bystatistically significant changes in such monthly teleconnection indices, asthe Arctic and North Pacific Oscillations.