CHANGE OF INTERVAL DURATION WITH VARIOUS TEMPERATURES FOR THE PERIODS OF THE WORLD METEOROLOGICAL ORGANIZATION (WMO) 1961-2014 IN CULTIVATED LAND OF THE DRY STEPPE ZONE OF THE CENTRAL PRE-CAUCASIAN REGION

The results of a statistical assessment of long-term temperatures for conditions of a dry steppe zone of the central Pre-Caucasian region of the republic of North Ossetia ? Alania at the weather station Mozdok (WMO id 37145) are given. The vacuum in estimated characteristics of temperature condition of this territory for such indicators as duration of the periods and transitions date with various temperature limits for the basic period of the World meteorological organization (WMO) for 1961-1990 and for the post-basic period of WMO for 1991-2014 is filled. Based on the statistical parameters calculations and criteria climatic norms of the periods duration with various temperature limits 0, 5, 10, 15 and 20 ºС and the corresponding transitions dates through the specified values are established. Taking into account the received values of "long-term norms" of the basic period of WMO 1961-1990, climatic shifts on various temperature limits on the basis of statistically confirmed trends according to Cox-Stewart criterion are revealed. The revealed shifts in climatic parameters indicate the significant increase in thermal resources for cultivated land of dry steppe zone of the central Pre-Caucasian region for the post-basic WMO period 1991-2014. For the agriculture sphere there are possibilities for the expansion of cultivated grades and hybrids number and crops of various maturity group, for formation of more flexible structure of lands under cultivation, optimization of crop rotations, development of productivity and quality of crop production.