Numerical Analysis of Trans-Boundary Transport of Dust-Nitrate during the Long-Lasting Yellow Sand Episode Observed over the Northern Kyushu Area in Late May—Early June 2014
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- Uno Itsushi
- Research Institute for Applied Mechanics, Kyushu University
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- Osada Kazuo
- Nagoya University, Graduate School of Environ. Studies
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- Yumimoto Keiya
- Meteorological Research Institute, Japan Meteorological Agency
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- Itahashi Syuichi
- Central Research Institute of Electric Power Industry
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- Kuwahara Shohei
- Interdisciplinary Graduate School of Engineering Science, Kyushu University
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- Pan Xiaole
- Research Institute for Applied Mechanics, Kyushu University
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- Hara Yukari
- Research Institute for Applied Mechanics, Kyushu University
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- Yamamoto Shigekazu
- Fukuoka Institute of Health and Environmental Sciences
Bibliographic Information
- Other Title
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- 九州北部で2014年5月下旬から1週間継続した黄砂期間の硝酸塩の越境輸送のモデル解析
- キュウシュウ ホクブ デ 2014ネン 5ガツ ゲジュン カラ 1シュウカン ケイゾク シタ コウサ キカン ノ ショウサンエン ノ エッキョウ ユソウ ノ モデル カイセキ
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Abstract
<p>We observed the 1-h resolution fine (particle diameter less than 2.5 μm) and coarse (particle diameter between 2.5–10 μm) mode NO3- and single particle (0.5–10 μm) number concentrations during the long-lasting yellow sand episode that occurred from May–June, 2014, in Fukuoka (Uno et al., 2016), and showed that both the fine and coarse NO3- concentrations strongly correlated with the coarse mode particles PMc (particle diameter between 2.5–10 μm) which is dominated by the yellow sand. The ratio of the concentration of the fine and coarse NO3- is 1 : 3, and the coarse NO3-/PMc ranges from 5–8% with R=0.87. This indicated that the NO3- was generated from the HNO3 gas by the heterogeneous reaction on the surface of the yellow sand particle (forming the dust-nitrate) and transported as Ca(NO3)2. A chemical transport model including the dust acid uptake processes reproduced both the observed dust and fine/coarse NO3- time variations. A source-receptor analysis for the origin of the observed dust-nitrate in Fukuoka showed that the 70–80% of the dust-nitrate originated from the NOx emission over the wide regions from Beijing to Shanghai, China, and the contribution of the Japanese NOx emission was less than 11%. Both observations and a numerical analysis showed that the coarse mode dust-nitrate fraction is larger than the fine-mode dust-nitrate. A chemical transport model analysis also indicated that the fine-mode dust-nitrate is an important fraction of the observed fine NO3- and showed that the dust-nitrate is also important for PM2.5 air pollution.</p>
Journal
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- Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi
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Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi 51 (4), 181-189, 2016
Japan Society for Atmospheric Environment
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Details 詳細情報について
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- CRID
- 1390001204617976320
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- NII Article ID
- 130005290270
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- NII Book ID
- AN10512108
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- ISSN
- 21854335
- 13414178
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- NDL BIB ID
- 027523517
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed
