Fogs in the southeast of Western Siberia

In the given article the basic characteristics and spatial structure of the number of days with fogs in the southeastof Western Siberia are considered. Sustainable economic development in different climatic conditions requires a careful study ofnatural resources, one of which is climate. Fog is one of the most dangerous atmospheric phenomena for all types of transport. Meteorologicalmonthly journals from 1966 till 2008 serve as a material for research. The study was conducted on 124 stations in the south-eastof Western Siberia (Novosibirsk, Tomsk, Kemerovo, Altai regions). The basic climatic characteristics of fogs are the number of dayswith fog per month, season and year, the average and greatest numbers of days with fog, the probability of various numbers of days withfog for separate months. To estimate the spatial distribution of the number of days with fog in the southeast of Western Siberia the moduleof geostatic analysis GA (Geostatical Analyst) of the ArcGis 9.3 GIS-program has been used. Using the measured values in referencepoints, by means of the Geostatistical Analyst module it is possible to interpolate values in other points within the given territorywhere measurements were not taken. The basic conclusions are as following: 1. The highest average number of days with fog observedat the stations were Kondoma (98,4), Ust-Kabyrza (95.8), Mezhdurechensk (68.3), Kuzedeevo (61.6), Maslyanino (51.3 days), Turochak(49.5 days), Katanda (42.7 days) and Kyzyl-Ozek (37.6 days); 2. In most parts of Tomsk and Altai regions the number of days with fogis 10-20 days. The same is observed in the central and western part of Novosibirsk region, in the western part of Kemerovo region; 3. Inthe north-eastern part of Tomsk region the number of days with fog decreases: Vanzhil-Kynak - 4.7 days, Baturino and Maisk - 7.9days; 4. A small average of days with fog is observed in the south of Altai region, near the station Zmeinogorsk (7.8), Krasnoshchekovo(8.1) and Shipunovo (8.8), and also in the western foothills of the Altai Republic: Kara Tureck (0.7) and Ak-Kem (4); 5. The greatestnumber of days with fog is observed at stations Kondoma (4233), Ust-Kabyrza (4119), Mezhdurechensk (2935), Kuzedeevo (2648). Thesmallest number is observed at the station Kara Tureck (28); 6. The tendency to decrease in the number of fogs, marked in Tomsk region,is not observed at all stations. At many stations, there is an increase in the number of fogs per year; 7. Fogs of 1-6 days long havethe greatest repeatability, except for some stations where fogs up to 30 days long (station Ust-Kabyrza) can be observed. 8. As it wasexpected, the distribution of probability of absence of fog on the territory shows that the least probabilities of fog practically coincidewith the areas with the greatest average of days with fog.

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