Академическое издательство «Гео»

Keywords: global and regional climate changes, wind regime, south of Western Siberia, roughness of underlying surface, solar radiation.



GEOGRAPHY AND NATURAL RESOURCES, 2017, № 2, p. 107-113

Featur of wind and air humidity over the Large Vasyugan Swamp

D.N. Troshkin, M.V. Kabanov, V.E. Pavlov, K.Yu. Sukovatov*

*Institute for Water and Environmental Problems, SB RAS,
ul. Molodezhnaya, 1, Barnaul, 656038, Russia, uchsec@iwep.ru, pavlov@iwep.ru, sky@iwep.ru
**Institute of Monitoring of Climatic and Ecological Systems, SB RAS,
pr. Akademicheskii, 10/3, Tomsk, 634055, Russia, kabanov@imces.ru

Data of the European Space Agency have been used in analyzing the annual wind regime and specific air humidity at the height of 10 m in the south of the Western Siberian Lowland. Our investigation used three zones with different properties of the underlying surface: the steppe zone, the Large Vasyugan Swamp, and the forest zone. It is established that in the three regions the mean wind velocities and directions differed little during 2008–2011, showing standard deviations only. A minor systematic excess of the wind velocities in the steppe zone over the velocities in the other zones is explained quite well by the difference in zonal roughnesses of the underlying surfaces: the roughness coefficient in the steppe zone is substantially lower. The more significant zonal differences correspond to the specific ground air humidity. Its decreased content in the steppe zone during the summertime, when compared with the swamp and forest zones, can be accounted for by the influence of solar radiation on evaporation of moisture from the land surface. Because of a strong warming of the soil and its drying, the evaporation process abruptly becomes attenuated. In the wintertime, the illumination of the snow cover in the swamp and forest zones, when compared with the steppe zone, is decreased under the influence of shadow effects thus attenuating the evaporation process.

Keywords: global and regional climate changes, wind regime, south of Western Siberia, roughness of underlying surface, solar radiation.

DOI: 10.21782/GiPR0206-1619-2017-2(107-113)

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