Analysis of monitoring data of ground-level ozone in Japan for long-term trend during 1990–2010: Causes of temporal and spatial variation

Akimoto, Hajime; Mori, Yasuaki; Sasaki, Kansuke; Nakanishi, Hiroto; Ohizumi, Tsuyoshi; Itano, Yasuyuki

doi:10.1016/j.atmosenv.2014.12.001

Cited by 113 publications

(76 citation statements)

References 34 publications

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“…About 1000 monitoring stations widely distributed throughout Japan, except on the southern islands, could be used for validation of the model results. The monitoring data of AEROS have been used to examine the long-term variation in surface O 3 over Japan in several studies and showed significant increasing trends (Ohara and Sakata, 2003;Ohara et al, 2008;Kurokawa et al, 2009;Akimoto et al, 2015). We validated the simulated surface O 3 over Japan with the AEROS data in terms of the long-term variation in the following.…”

Section: Tracer Taggingmentioning

confidence: 70%

“…In Japan, analysis of long-term observations by the ambient air quality monitoring network mainly established in urban-suburban regions also showed continuous increases in surface O 3 from the mid-1980s until the present (Ohara and Sakata, 2003;Ohara et al, 2008;Kurokawa et al, 2009;MOE Japan, 2013;Wakamatsu et al, 2013;Akimoto et al, 2015). The consequent high violation rate of national ambient air quality standard (AAQS) for surface O 3 (hourly mean concentration of 60 ppbv) has also been a persistent issue in environmental administration for a long time.…”

Section: Introductionmentioning

confidence: 99%

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Long-term change in the source contribution to surface ozone over Japan

et al. 2017

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Abstract. The relative contributions of various source regions to the long-term increasing trend in surface ozone (O 3 ) over Japan were estimated by a series of tracer-tagging simulations using a global chemical transport model. The model simulated the observed increasing trend in surface O 3 , including its seasonal variation and geographical features, in Japan well and demonstrated the relative roles of different source regions in forming this trend. Most of the increasing trend in surface O 3 over Japan (∼ 97 %) that was simulated was explained as the sum of trends in contributions of different regions to photochemical O 3 production. The increasing trend in O 3 produced in China accounted for 36 % of the total increasing trend and those in the other northeast Asian regions (the Korean Peninsula, coastal regions in East Asia, and Japan) each accounted for about 12-15 %. Furthermore, the contributions of O 3 created in the entire free troposphere and in western, southern, and southeastern Asian regions also increased, and their increasing trends accounted for 16 and 7 % of the total trend, respectively. The impact of interannual variations in climate, in methane concentration, and in emission of O 3 precursors from different source regions on the relative contributions of O 3 created in each region estimated above was also investigated. The variation of climate and the increase in methane concentration together caused the increase of photochemical O 3 production in several regions, and represented about 19 % of the total increasing trend in surface O 3 over Japan. The increase in emission of O 3 precursors in China caused an increase of photochemical O 3 production not only in China itself but also in the other northeast Asian regions and accounted for about 46 % of the total increase in surface O 3 over Japan. Similarly, the relative impact of O 3 precursor emission changes in the Korean Peninsula and Japan were estimated as about 16 and 4 % of the total increasing trend, respectively. The O 3 precursor emission change in regions other than northeast Asia caused increases in surface O 3 over Japan mainly through increasing photochemical O 3 production in western, southern, and southeast Asia and the free troposphere and accounted for about 16 % of the total.

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Section: Tracer Taggingmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Long-term change in the source contribution to surface ozone over Japan

et al. 2017

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“…Previous studies of NE Chinese cities including Changchun and Shenyang showed greater O 3 pollutions between urban and rural areas with the high concentrations of O 3 precursors (e.g., VOC and NO x ) (Chen, 2014;Liu et al, 2000). Akimoto et al (2015) noted increased trans-boundary transport of O 3 in Osaka, Japan during 1990-2010; they also found that the local O 3 pollution decreased due to the reduction of in situ photochemical reactions. Sikder et al (2011) characterized the marine source origins into two different categories: (1) cleaner source regions (M1): mid-Pacific, East China Sea, or the Philippine Sea, and (2) subregionally deviated source regions (M2): passing over China, Korea, or Japan.…”

Section: Omentioning

confidence: 92%

Identification of nitrogen dioxide and ozone source regions for an urban area in Korea using back trajectory analysis

Vellingiri

Kim

Lim

et al. 2016

Atmospheric Research

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“…Koike et al 2013). Because of transboundary transportation, even in places where the precursors' levels are quite low, the O 3 levels can become as high as in other places where the concentrations of precursors are high (Nagashima et al 2010;Kleanthous et al 2014;Akimoto et al 2015). For instance, the Mediterranean island Cyprus is not characterized by urbanization and industrialization.…”

Section: Tropospheric Ozone: a Threat To Plantsmentioning

confidence: 99%

Ethylene-di-urea (EDU), an effective phytoproctectant against O<sub>3</sub> deleterious effects and a valuable research tool

Agathokleous

Koike

Watanabe

et al. 2015

J. Agric. Meteorol.

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Ground-surface ozone (O 3 ) has been increasing over the last decades, and it is now well known that crop and forestry plants suffer from elevated O 3 levels. Ethylene-di-urea (EDU) is considered a chemical that offers protection to the treated plants against Ο 3 . Increasing evidence on the antiozonate efficacy of EDU against the phytotoxic action of O 3 is becoming more readily available. We aimed to review the current literatures on the EDU effects on plants, summarize the findings, note any problems, and formulate conclusions from the existing researches. EDU is a very promising antiozonant with its antiozonate action being observed when applied to roots in the concentrations of 275.7 to 374.3 mg L -1 , or on leaves in the concentrations of 365.1 to 519.5 mg L -1. There is an evidence that EDU was more effective in some cultivars compared with others although this remains inexplicable. Additionally, the biochemical mechanism of its antiozonate activity is not well understood and requires parallel toxicological studies. In summary, EDU must play an important role in O 3 research in the future.

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Analysis of monitoring data of ground-level ozone in Japan for long-term trend during 1990–2010: Causes of temporal and spatial variation

Cited by 113 publications

References 34 publications

Long-term change in the source contribution to surface ozone over Japan

Long-term change in the source contribution to surface ozone over Japan

Identification of nitrogen dioxide and ozone source regions for an urban area in Korea using back trajectory analysis

Ethylene-di-urea (EDU), an effective phytoproctectant against O<sub>3</sub> deleterious effects and a valuable research tool

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