Abstract

The atmospheric drought as hazardous atmospheric phenomenon leads to significant loss in the economic sectors of many countries of the world including Central Asia. The purpose of the research is to develop new criteria corresponding to pessimum of crops condition. As such a parameter one has been chosen that takes into account the air temperature and humidity. The parameter has been named thermohygrometric factor of air dryness (THF). New direction of fundamental and applied sciece-ecological qualimetry is a methodological toolkit of the research. Besides, the methods of correlation regression analysis are widely used. The present day analysis of the air temperature and humidity on various crops showed that at K within 76-90‰ at any air temperatures relative air humidity is 24-26%, which corresponds to law intensity atmospheric drought (AD). From independent sources it is known that weak AD is observed at the relative humidity less than 30%. From the same sources it is known that at more intensive drought (moderate drought) relative humidity is in the range of 15-20%. In our calculation, K within 89-92‰ corresponds to this relative humidity. Relative humidity 10-20% corresponds to strong AD. At these values of relative humidity, К falls within 103-106‰. At very strong drought, relative humidity is less than 10%, and К is higher than 120‰. Necessary and sufficient conditions for AD of any intensity to emerge have been defined. The dependence between air temperature and water vapor pressure is sustainable and reliable. The results obtained cam be applied for AD study in other regions of the world.