Comparative Analysis of Reanalysis and Aerological Sounding Data and Its Validation for the Indicator of Possible Aircraft Icing on the Example of Voronezh Point

Abstract

The purpose is comparative analysis of meteorological characteristics (air temperature and relative humidity) based on reanalysis and airborne sensing data at certain point. Methods and materials. The data of reanalysis NCEP/DOE AMIP-II and airborne sensing telegrams are initial information. Nonparametric criteria of applied statistics were used to compare multiyear data series for each month. Results and discussion. It was found that the corresponding sets of air temperature and humidity values for reanalysis and atmospheric sounding at the levels of 925, 850, 700, 500 hPa in each month have identical distributions. It was determined that the statistical correspondence of the compared pairs of parameter values is not observed. Validation of the analysis was carried out using the example of calculating the climatic index for assessing the possible icing of an aircraft. Conclusions. The reanalysis data (temperature and relative humidity) can be used in climatological studies, with the exception of air humidity parameter of 1000 hPa level. Operational forecasting based on reanalysis data is problematic.