Identification of periods with maximum heat island intensity in St. Petersburg for the validation of numerical weather forecasts / Ladohina E.M., Rubinshtein K.G., Tsepelev V.Y. // Hydrometeorological Research and Forecasting, 2020, no. 2 (376), pp. 109-125.

The series of routine meteorological observations of air temperature in St. Petersburg and at Leningrad region stations for the period 1994-2018 are analyzed. The air temperature perturbation in St. Petersburg equal to 1.13° is detected. The method of the semiempirical interpolation model for the calculation of intensity of anthropogenic temperature perturbations in St. Petersburg is tested. The method is based on the retrieval of temperature in undisturbed areas using the algorithms of two-dimensional interpolation. The results are validated by the method for estimating the temperature difference between the big city and the suburban station. A criterion is developed for the detection and analysis of heat island intensity based on the results of its calculation by two methods. It is found that the highest values of heat island intensity are reached in winter, in February: the maxima reach 6.4°, the average values reach 3.0°. The intensity of the heat island in St. Petersburg is characterized by daily variations: the greatest maximum and average values are observed on midnight and reaches 2.9° and 5.2°, respectively, and the smallest ones are detected on noon and reaches 2.3° and 3.8°, respectively.

Keywords: metropolis air temperature perturbation, anthropogenic impact on the atmosphere, spatial interpolation of observational data

Tab. 1. Fig. 5. Ref. 21.