Large-scale Modes of Atmospheric Variability. Part II. The Impact on the Spatial Distribution of Temperature and Precipitation on the Territory of Northern Eurasia

I. A. Kulikova, E. N. Kruglova, and D. B. Kiktev

Considered are the possibilities of identifying the patterns of atmospheric circulation using the quartile analysis of teleconnection indices represented in the form of univariate time series. The composite maps of the spatial distribution of the anomalies of major meteorological parameters (500 hPa geopotential height, sea level pressure, air temperature at 850 hPa, surface air temperature, and precipi- tation) in the Northern Hemisphere are plotted for the distinguished positive and negative phases of each index of atmospheric circulation. The statistical estimation of the mean values of the anomalies of meteorological parameters for each (positive or negative) phase of the index was carried out using the bootstrap procedure. The mapping of the mean values which significantly exceeded the threshold values enabled detecting the trace of atmospheric circulation in the gradations of temperature and precipitation. This approach was realized in the framework of the processing line of global long-range weather forecasts issued by the Hydrometcenter of Russia.