DOI: 10.1016/j.atmosenv.2014.12.001
Scopus记录号: 2-s2.0-84917706138
论文题名: Analysis of monitoring data of ground-level ozone in Japan for long-term trend during 1990-2010: Causes of temporal and spatial variation
作者: Akimoto H ; , Mori Y ; , Sasaki K ; , Nakanishi H ; , Ohizumi T ; , Itano Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 102 起始页码: 302
结束页码: 310
语种: 英语
英文关键词: Ground-level ozone
; NO titration effect
; Ozone control strategy
; Photochemical oxidants
; Transboundary transport
Scopus关键词: Emission control
; Mixing
; Monitoring
; Oxidants
; Ozone
; Titration
; Ground-level ozone
; NO titration
; Ozone control
; Photochemical oxidants
; Trans-boundary
; Reduction
; ozone
; data interpretation
; database
; emission control
; environmental monitoring
; long-term change
; mixing ratio
; oxidant
; ozone
; photochemistry
; spatiotemporal analysis
; trend analysis
; air pollution control
; Article
; human
; Japan
; photochemistry
; precursor
; spatial analysis
; Taiwan
; temporal analysis
; titrimetry
; trend study
; Aichi
; Chubu
; Fukuoka [Kyushu]
; Honshu
; Japan
; Kanto
; Kinki
; Kyoto [Kinki]
; Kyushu
; Nagoya
; Osaka [Kinki]
; Tokyo [Kanto]
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The puzzling increase of annual average mixing ratio of ozone (oxidant) in spite of the decrease of those of the ambient NOx and NMHC was analyzed using the twenty-one years monitoring data during 1990-2010 focusing on four high O3 areas in Japan, Tokyo Metropolitan Area (TMA), Nagoya Area (NA), Osaka/Kyoto Area (OKA) and Fukuoka Area (FA). During the period, the NOx and NMHC mixing ratios have decreased by 40-50 % and 51-54 %, respectively, in these areas. Nevertheless, the annual averaged increasing trends of O3 by linear regressions during the whole period are all positive, 1.23±0.09, 0.85±0.17, 1.41±0.12 and 1.42±0.17(1σ)%yr-1 for TMA, NA, OKA and FA, respectively. Three causes of long-term trends of O3 have been discussed: (1) the decrease of NO titration effect, (2) the increase of transboundary transport, and (3) the decrease of in situ photochemical production. The total ozone (TO) was defined by [TO]=[O3]+[NO2]-0.1[NOx] as an index to indicate the net O3 removing the perturbation by in situ NO titration. TO shows statistically significant annual increasing trends, 0.20±0.04 and 0.56±0.08%yr-1 only in OKA and FA, and the increase of TO is not discernible in TMA and NA. In springtime (March-May), TO shows larger increasing rates of 0.44±0.08, 0.59±0.09 and 0.96±0.18%yr-1 for TMA, OKA, and FA. The statistically significant increase of TO at higher rates in spring and western part of Japan suggests the increase of transboundary transport during the period. The reduction of domestic emissions of precursors was found to result the decreasing trend of the high mixing ratio range of 98-percentile most clearly in TMA, but is not enough yet to result in the decrease of annual mean mixing ratio of O3, which is compensated by the increase of transboundary transport and the decrease of the NO titration effect. The similar situation has been reported in Taiwan (Chou etal., 2006), and would apply more or less to other outflow region of Pacific rim, Korea and Hoang Kong, where the emission control started to reduce the O3 precursors. Further reduction of NOx emissions over a certain limit will negate the NO titration effect, and the decrease of net O3 due to the reduction of in situ photochemical production is expected. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82053
Appears in Collections: 气候变化事实与影响
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作者单位: Asia Center for Air Pollution Research, 1182 Sowa, Nishi-ku, Niigata, Japan; Japan Weather Association, 3-1-1 Higashi-ikebukuro, Toshima-ku, Tokyo, Japan; Osaka City Institute of Public Health and Environmental Sciences, 8-34 Tojo-cho, Tennoji-ku, Osaka, Japan
Recommended Citation:
Akimoto H,, Mori Y,, Sasaki K,et al. Analysis of monitoring data of ground-level ozone in Japan for long-term trend during 1990-2010: Causes of temporal and spatial variation[J]. Atmospheric Environment,2015-01-01,102