Photochemical reactions and surface ozone measurements in Tehran city center

Efforts have been made for surface ozone concentration measurements considering secondary reactions via actinometry. Pyro heliometry, pyranometry and spectrophotometry, idometry in Amir Abad station of Tehran city center parallel. In actinometry method consideration were to show solar radiation all different filters green, yellow, red dark by means 525 nm, 630 695 nm 721 parallel the same time during 1991–1992. Resulted as reduction concluded at Amirabad first Iran. Measurements daily seasonally midday station. Where spectrophotometry certain wavelengths 276.5 301 autumn winter considering, October, November, December 1991–1992 1999–2001, using rain samples. Which has shown a range 30–60 (ppb) 80–115 (ppb), respectively. The function photochemical NO 2 . photon rays agreement with results spectrometry due F.M. Shahrtash This study was agreements works Montreal, Ca (1992). Other data collection analysis (MOI) from Mehrabad Dobson summer–autumn 2015. 80–92 comparison Besides recent research work China, which detected 70–100 ppb 2013–2018, mainly North China Yangtze river plain” “photochemical ozone” this whole.