DOI: 10.1016/j.atmosenv.2014.04.022
Scopus记录号: 2-s2.0-84899131252
论文题名: Modeling investigation of controlling factors in the increasing ratio of nitrate to non-seasalt sulfate in precipitation over Japan
作者: Itahashi S ; , Uno I ; , Hayami H ; , Fujita S ; -I
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 171
结束页码: 177
语种: 英语
英文关键词: Community multi-scale air quality (CMAQ) model
; Nitrate to non-seasalt sulfate ratio (NO3-/nss-SO42-)
; Precipitation chemistry
Scopus关键词: Acidification
; Air quality
; Nitrates
; Sulfur dioxide
; Anthropogenic emissions
; Community multi-scale air qualities
; Controlling factors
; East Asian countries
; Emission ratio
; Long-term behavior
; Precipitation chemistry
; Sulfate ratio
; Gas emissions
; nitrate
; sulfate
; acidification
; air quality
; anthropogenic source
; atmospheric pollution
; nitrate
; nitrogen oxides
; precipitation (chemistry)
; sea salt
; sulfur dioxide
; acid deposition
; acidification
; air pollution
; air quality
; article
; chemical composition
; chemistry
; China
; combustion
; desulfurization
; Japan
; Japanese
; precipitation
; priority journal
; sensitivity analysis
; simulation
; China
; Japan
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: Anthropogenic emissions in East Asia have been increasing during the three decades since 1980, as the population of East Asia has grown and the economies in East Asian countries have expanded. This has been particularly true in China, where NOx emissions have been rising continuously. However, because of fuel-gas desulfurization systems introduced as part of China's 11th Five-Year Plan (2006-2010), SO2 emissions in China reached a peak in 2005-2006 and have declined since then. These drastic changes in emission levels of acidifying species are likely to have caused substantial changes in the precipitation chemistry. The absolute concentration of compounds in precipitation is inherently linked to precipitation amount; therefore, we use the ratio of nitrate (NO3-) to non-seasalt sulfate (nss-SO42-) concentration in precipitation as an index for evaluating acidification, which we call Ratio. In this study, we analyzed the long-term behavior of Ratio in precipitation over the Japanese archipelago during 2000-2011 and estimated the factors responsible for changes in Ratio in precipitation by using a model simulation. This analysis showed that Ratio was relatively constant at 0.5-0.6 between 2000 and 2005, and subsequently increased to 0.6-0.7 between 2006 and 2011. These changes in Ratio corresponded remarkably well to the changes of NOx/SO2 emissions ratio in China; this correspondence suggests that anthropogenic emissions from China were responsible for most of the change in precipitation chemistry over Japan. Sensitivity analysis elucidated that the increase in NOx emissions and the decrease in SO2 emissions contributed equally to the increases in Ratio. Considering both emission changes in China enables to capture the observed increasing trend of Ratio in Japan. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81049
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko, Chiba 270-1194, Japan; Research Institute for Applied Mechanics, Kyushu University, Kasuga Park 6-1, Kasuga, Fukuoka 816-8580, Japan
Recommended Citation:
Itahashi S,, Uno I,, Hayami H,et al. Modeling investigation of controlling factors in the increasing ratio of nitrate to non-seasalt sulfate in precipitation over Japan[J]. Atmospheric Environment,2014-01-01,92