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J Environ Sci (China)

Title:		Modeling of spatial and temporal variations of ozone-NO(x)-VOC sensitivity based on photochemical indicators in China
Author(s):		Du X; Tang W; Cheng M; Zhang Z; Li Y; Li Y; Meng F;
Address:		"State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Water Sciences, Beijing Normal University, Beijing 100857, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Guangzhou Marine Geological Survey, Guangzhou 510075, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: mengfan@craes.org.cn"
Journal Title:		J Environ Sci (China)
Year:		2022
Volume:		20220105
Issue:
Page Number:		454 - 464
DOI:		10.1016/j.jes.2021.12.026
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Comprehensive air quality model with extensions (CAMx)-decoupled direct method (DDM) was used to simulate ozone-NO(x)-VOCs sensitivity of for May-November in 2016-2018 in China. Based on the relationship between the simulated ozone (O(3)) sensitivity values and the ratio of formaldehyde (HCHO) to NO(2) (FNR) and the ratio of production rate of hydrogen peroxide (H(2)O(2)) to production rate of nitric acid (HNO(3)) ( [Formula: see text] ), the localized range of FNR and [Formula: see text] thresholds in different regions in China were obtained. The overall simulated FNR values are about 1.640-2.520, and [Formula: see text] values are about 0.540-0.830 for the transition regime. Model simulated O(3) sensitivities or region specific FNR or [Formula: see text] thresholds should be applied to ensure the accurate local O(3) sensitivity regimes. Using the tropospheric column FNR values from ozone monitoring instrument (OMI) satellite data as an indicator with the simulated threshold values, the spatial distributions of O(3) formation regimes in China are determined. The O(3) sensitivity regimes from eastern to central China are gradually from VOC-limited, transition to NO(x)-limited spatially, and moving toward to transition or NO(x)-limited regime from 2005 to 2019 temporally"
Keywords:		*Air Pollutants/analysis China Environmental Monitoring Hydrogen Peroxide *Ozone/analysis *Volatile Organic Compounds/analysis Formaldehyde No(2) Ozone monitoring instrument (OMI) Ozone sensitivity analysis Photochemical indicator;
Notes:		"MedlineDu, Xiaohui Tang, Wei Cheng, Miaomiao Zhang, Zhongzhi Li, Yang Li, Yu Meng, Fan eng Netherlands 2022/04/24 J Environ Sci (China). 2022 Apr; 114:454-464. doi: 10.1016/j.jes.2021.12.026. Epub 2022 Jan 5"