Climate conditions of low clouds over the territory of Siberia and its modern change. Part 2. Changes of low clouds conditions
V.S. Komarov, S.N. Il’in, A.V. Lavrinenko, N.Ya. Lomakina, E.V. Gorev, D.P. Nakhtigalova
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
gfm@iao.ru
Keywords: low-level clouds, amount of low clouds, long-period changes, Siberian region
Abstract
The results of the analysis of climatic changes of the amount of low clouds over the territory of Siberia for the last 47 years (1966-2012) are presented according to the data of ground-based meteorological observations of 25 stations with annual and seasonal averaging. It has been found that the significant long-term fluctuations of the lower clouds are typical for the concerned period (relative to the standard of the 1966-1975 or 1976-2005). The amount of low clouds increased everywhere at the end of the XX century and at the beginning of the XXI (from 1976 to 2005), when global warming was observed over the territory of the Northern hemisphere. Over the period of the started cooling (2006-2012) a significant decrease of the amount of low clouds has been observed over the Western Siberia, and the marked weakening of its growth has been observed over the Eastern Siberia.
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