In this work, we present estimates of the predictions of global horizontal irradiance, as well as of the profiles of air temperature and relative humidity in the interval of 10-40 m under the clear-sky summer conditions near Tomsk. The numerical experiments are carried out for three different configurations of the WRF-Solar model. Data of measurements are obtained using the measurement complex, located on the territory of “Fonovaya” observatory (IAO SB RAS). The statistical analysis of the calculation errors showed that the mean absolute errors and the root-mean-square errors are: 30 W/m2 and 40 W/m2 for GHI, 1.2°C and 1.5°C for air temperature, as well as 10% and 15% for the relative air humidity, averaged over the altitude interval of 10-40 m. Preliminary results showed that the chosen sets of parameterizations make it possible to simulate these characteristics with the accuracy no worse than that of similar calculations by other authors under the analogous conditions.
The paper studies the changes in the gas composition of the atmosphere in the surface layer for the Tomsk region (Akademgorodok) during the periods of sharp change of air masses. Studies were conducted for the summer seasons (June-August 1993-2018) for the periods of change of air masses from warm to cold. Ozone, carbon dioxide, carbon monoxide and sulfur dioxide (O3, CO2, CO, SO2) concentrations were used for the analysis of the change in chemical composition. The concentrations have been derived from TOR station. For the analysis of air mass change, ECMWF Era-Interim data on the potential temperature on the dynamic tropopause (PV-θ) was used. The paper studies the processes air mass change in which the difference of PV-θ anomaly was about 20-30 K. It was found that the concentration of CO2 is mainly increasing, and concentrations of O3 and aerosol are decreasing during the polar intrusion. For CO and SO2, no dependence on a sharp change in the air mass properties was found.
Here, we present the results of analysis of interannual variability and frequency of occurrence of atmospheric pressure systems and air masses of different types observed in the Tomsk region over the period from 1993 to 2016. The following types of APS were analyzed: cyclones, anticyclones, troughs, ridges, low-gradient baric fields, and contrast zones (areas of high-gradient baric filed between Zn and Azn). It is shown that the difference in the frequency of cyclones and anticyclones has significantly decreased over the past decade in the Tomsk region. In 2015 - 2016, their repeatability was almost the same. There is a tendency to decrease in the frequency of Arctic air mass occurrence and increase in subtropical air masses. During the past decade, tropical air masses have become to be observed more often in our region, especially in the spring.
The content of gaseous species of atmosphere (СО, СO2, NO2, O3, СН4) during the period of smoke haze caused by forest fires in the summer 2012 over Siberia is analyzed on the base of satellite and ground-based (Tomsk) measurements. The temporal evolution of the spatial distributions of carbon monoxide and aerosol optical thickness of the atmosphere over Tomsk region is discussed.
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