Temperature changes. At the beginning of the 20^ht century air temperature sliding over decades exceeded perennial mean temperature and kept above it up to 1921-1930. The period of 1910-1925 was the warmest. Beginning from 1921-1930, up to 1931-1940, mean annual air temperature was below normal. 1934 was the coldest year. The warming, which began since 1931-1940, continued till 1942-1951. After 1951, there was a transition of temperatures over the annual mean level to their decline; a reverse transition took place in 1952-1961. The temperature background above normal has been holding for almost three decades.

      Perennial mean annual trend of surface air temperature at the station Frunze (the cold half-year)      

 The periods of mean annual temperatures fluctuations well agree with the values of the solar cycle, the double solar cycle, and Brickner^, s cycle. Over the last decades annual mean temperature in Bishkek fluctuated close to perennial mean values with a tendency to increase. Over the century, the linear trend rate in the cold half-year fluctuated from 1.1^oC (the station Tien Shan) to 3.5^oC (the station Frunze).  

 Sources:     Chen B.B., Lelevkin V.M. The stratospheric ozone layer over Central Asia. – Bishkek, KRSU, 2000.– 228 p.