Factor Analysis of Meteo-parameters on the Stage of Growth of Birch Leaves

Of the many meteorological parameters of the site http://rp5.ru weather station identified 27 quantitative factors from 01/05/2018 (bud break) to 20/08/2018 (the moment of maximum growth at the best registered birch leaves). The coefficient of correlation variation, that is, the measure of the functional relationship between weather parameters is 0.2754. As the influencing variable in the first place «Dew point temperature», in the second – «Maximum gust of wind». The same parameters were leading in the rating indicators. Only six strong patterns turned out between nine meteorological parameters with a correlation coefficient of at least 0.7. Two more formulas with an average adequacy between air temperature and dew point temperature. Of greatest significance are the maximum gust of wind and wind speed at 0.9339 and 0.9321. The coefficient of correlative variation increased instead of 0.2754 for trends to 0.3135 with wavelet dynamics. The azimuth in the dynamics does not move at all, which indicates the independence of the geographical factor, measured by points, from the meteorological parameters. The remaining parameters of wind and wind gusts require a reduction in measurement error. When modeling with trends and wavelets, relative humidity was the first among influencing variables, and dew point temperature was second. In third place was the pressure tendency of atmospheric pressure. Among the indicators in the first place remained the temperature of the dew point, the second - the relative humidity of the air, the third - the maximum gust of wind. For the growth stage of birch leaves, the most important meteorological parameters are air humidity and dew point temperature.

Keywords: Growth stage of birch leaves; Meteorological parameters; Three-hour measurements; Dynamics; Regularities; Ratings of factors