TREND ANALYSIS OF NITROGEN OXIDE (NO) AND NITROGEN DIOXIDE (NO 2 ) CONCENTRATION IN TASHKENT CITY (BASED ON MANN-KENDALL TEST)

Abstract

In this study, from January 2012 to December 2022, the long-term average values of the concentration of Nitrogen oxide (NO) and Nitrogen dioxide (NO 2 ) in the air of the city of Tashkent were analyzed using the MS Excel program. The dynamic of change was statistically analyzed based on the Mann-Kendall trend test. According to the result of the trend test, it was found that the significant change was in October (Z=2.26), these results were respectively for NO (Z=2.02) and for NO 2 ( Z=2.26). On the basis of these results, the necessary conclusions were drawn regarding the monitoring of atmospheric air in the future.