HOt Products
网页Industry related species like light alkenes were of particular importance in both urban and suburban Tianjin, while in Shanghai aromatics dominated. In general, the ozone problem in Shanghai is on an urban scale. Stringent control policies on local emissions would help 网页[1] Ozone and its precursors were measured from 15 June 2006 to 14 June 2007 at an urban site in Shanghai and used to characterize photochemical oxidant production in this 网页2020年6月3日 A high level of ozone (O3) is frequently observed in the suburbs of Shanghai, the reason for this high level remains unclear. To obtain a detailed insight on 网页2017年10月4日 Ozone photochemical production in urban Shanghai, China: Analysis based on ground level observations Liang Ran,1 Chunsheng Zhao,1 Fuhai Geng,2 Xuexi 网页2021年9月15日 In Shanghai, VOCs contributors to ozone formation were dominated by aromatics, followed by alkenes and alkanes. While, aldehydes, ketones, and ethyl 网页2020年7月1日 1. Introduction. High levels of ozone (O 3) in urban and regional areas worldwide have long been a major air quality issue (Li et al., 2019; Paoletti et al., 2014; 网页2020年7月31日 7532 L. Ran et al.: Ozone production in summer in Tianjin and Shanghai Haagen-Smit, 1952; Haagen-Smit et al., 1953; Seinfeld and Pandis, 1998). Thus, there is 网页2007年2月1日 Shanghai Meteorological Administration has established a volatile organic compounds (VOCs) laboratory and an observational network for VOCs and ozone (O 3) 网页2017年1月1日 4 Shanghai Academy of Environmental Sciences, Shanghai, China. 5 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic 网页2012年8月17日 A comparative study on ozone photochemical production in summer has thus been carried out in the megacities of Tianjin (NCP) and Shanghai (YRD). Two 网页Figure 1. Monthly characteristics of ozone pollution and its precursors in the Shanghai metropolitan area. (A) Monthly pattern of MDA8 over the National Air Quality Standard (160 μg/m 3) rates from 2013 to 2019, and the monthly temperature from 2013 to 2019. (B) Monthly pattern of the OH reactivity of the observed VOCs (k VOCs), CO (k CO), and NO 网页2013年10月21日 All four cities suffered from severe ozone pollution. At the rural site of Beijing, export of the well-processed urban plumes contributed to the extremely high ozone levels (up to an hourly value of 286 ppbv), while the pollution observed at the suburban sites of Shanghai, Guangzhou and Lanzhou was characterized by intense in-situ ozone 网页2017年12月1日 Vertical profiles of the aerosol extinction coefficient and NO 2 and HCHO concentrations were retrieved from MAX-DOAS measurement, while vertical distribution of O 3 was obtained using ozone lidar. The measured O 3 vertical distribution indicates that the ozone production not only occurs at surface level but also at higher altitudes (about 1.1 网页2022年5月27日 Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China. In the atmosphere, hydroxyl radicals (OH)-initiated oxidation processes can lead to production of ozone (O 3) and secondary organic aerosols, which can in turn result in air pollution and even indirectly affect the global climate. Total OH reactivity is a 网页2017年10月4日 Ozone photochemical production in urban Shanghai, China: Analysis based on ground level observations Liang Ran,1 Chunsheng Zhao,1 Fuhai Geng,2 Xuexi Tie,3 Xu Tang,2 Li Peng,2 Guangqiang Zhou,2 Qiong Yu,2 Jianmin Xu,2 and Alex Guenther3 Received 9 July 2008; revised 26 May 2009; accepted 3 June 2009; 网页All four cities suffered from severe ozone pollution. At the rural site of Beijing, export of the well-processed urban plumes contributed to the extremely high ozone levels (up to an hourly value of 286 ppbv), while the pollution observed at the suburban sites of Shanghai, Guangzhou and Lanzhou was characterized by intense in-situ ozone production. 网页2008年9月1日 The rate of ozone production is a function of VOCs and NOx in the atmosphere. VOCs/NOx ratio in Xujiahui is 4.55 at weekends, and 4.37 on weekdays, belonging to the “NOx -limited”. The 网页2018年12月31日 Several studies have reported increasing ozone trends of 1–2 ppbv a −1 at urban and background sites in eastern China over the 2001–2015 period (7, 13–15).Surface ozone data were very sparse before 2013. Starting in 2013 the surface monitoring network greatly expanded, and detailed hourly data across all of China 网页Offshore oil production, which is a significant source of petroleum, has recently caused extensive concern. Produced water (PW) is the highest-volume byproduct of oil and gas production. 网页2013年10月21日 All four cities suffered from severe ozone pollution. At the rural site of Beijing, export of the well-processed urban plumes contributed to the extremely high ozone levels (up to an hourly value of 286 ppbv), while the pollution observed at the suburban sites of Shanghai, Guangzhou and Lanzhou was characterized by intense in-situ ozone 网页2017年10月4日 Ozone photochemical production in urban Shanghai, China: Analysis based on ground level observations Liang Ran,1 Chunsheng Zhao,1 Fuhai Geng,2 Xuexi Tie,3 Xu Tang,2 Li Peng,2 Guangqiang Zhou,2 Qiong Yu,2 Jianmin Xu,2 and Alex Guenther3 Received 9 July 2008; revised 26 May 2009; accepted 3 June 2009; 网页2022年1月28日 In view of this, following a one-month first in-situ HOx radicals measurement in the wintertime of Shanghai with a self-developed HOx instrument, Prof. Hu Renzhi and Ph.D. student Zhang Guoxian, a 网页2015年3月30日 Horizontal transport of O 3 and its precursors, from Shanghai to Kunshan, are suppressed in the lower boundary layer but are strengthened in the upper boundary layer because of strong urban heat island circulation. As a result, O 3 chemical production is decreased in the lower boundary layer of Kunshan but is increased in the upper 网页2022年1月18日 近日，我校应用气象学院冯兆忠教授课题组在全球顶级学术期刊《Nature》子刊《Nature Food》以论文形式在线发表最新成果（Ozone pollution threatens the production of major staple crops in East Asia）。. 该研究科学评估了当前近地层臭氧（O3）污染对东亚地区小麦、水稻和玉米 网页2022年3月28日 Ozone (O 3) pollution, a threat to both human health 1 and the ecosystem 2, would become the top issue of China’s future air pollution control as the gradual improvement of particulate pollution 网页Commercial Ozone Production from UV Light. Ozone is produced commercially from an ozone generator using UV light also. Ozone is produced from UV light wavelengths below 240 nm. Ozone production 网页2 天之前 They were also relatively recent. Large-scale production of chemicals harming the ozone layer only began in the 1960s; and in 1960 carbon dioxide concentrations in the atmosphere were just 5 percent above pre-industrial levels. Coming to broader public attention, these two new forms of human impact had very different resolution. 网页High-concentration ozone-water can be directly produced with a zero-gap electrolytic cell containing a freestanding perforated boron-doped diamond electrode. For the sake of improving current efficiency for electrochemical ozone-water production, optimization of the electrode configuration was performed. 网页Offshore oil production, which is a significant source of petroleum, has recently caused extensive concern. Produced water (PW) is the highest-volume byproduct of oil and gas production.
Ozone production in summer in the megacities of Tianjin
Ozone photochemical production in urban Shanghai,
Precursors and potential sources of ground-level ozone in
Ozone photochemical production in urban Shanghai,
Prospects for ozone pollution control in China: An
The impact of volatile organic compounds on ozone
Ozone production in summer in the megacities of Tianjin
Analysis of ozone and VOCs measured in Shanghai: A case
Ozone pollution in China: A review of concentrations
Ozone Production in Megacities of Tianjin and Shanghai,
Unexpected fast radical production emerges in cool
Ozone production in four major cities of China: sensitivity
ACP Observations of the vertical distributions of
Total OH Reactivity Measurements in a Suburban Site of
Ozone photochemical production in urban Shanghai,
ACPD Ozone production in four major cities of China:
(PDF) Study of ozone “weekend effect” in
Anthropogenic drivers of 2013–2017 trends in summer
Hao LU East China University of Science and Technology,
Ozone production in four major cities of China: sensitivity
Ozone photochemical production in urban Shanghai,
Underestimated ozone production in cities: Higher HOx
Impact of Shanghai urban land surface forcing on
应用气象学院冯兆忠教授团队在《Nature》子刊发表新成果
Seasonality and reduced nitric oxide titration dominated
Ozone Production Ozone equipment
The Age of Interconnection: A Global History of the
Electrochemical Production of High-Concentration Ozone
Hao LU East China University of Science and Technology,