WEKO3
アイテム
Triple oxygen isotopes indicate urbanization affects sources of nitrate in wet and dry atmospheric deposition
http://hdl.handle.net/2237/00027938
http://hdl.handle.net/2237/00027938d76e8016-489c-4982-9b40-b4e6ee388b92
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
acp-18-6381-2018 (788.9 kB)
|
|
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-05-07 | |||||
| タイトル | ||||||
| タイトル | Triple oxygen isotopes indicate urbanization affects sources of nitrate in wet and dry atmospheric deposition | |||||
| 言語 | en | |||||
| 著者 |
Nelson, David M.
× Nelson, David M.× Tsunogai, Urumu× Ding, Dong× Ohyama, Takuya× Komatsu, Daisuke D.× Nakagawa, Fumiko× Noguchi, Izumi× Yamaguchi, Takashi |
|||||
| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Atmospheric nitrate deposition resulting from anthropogenic activities negatively affects human and environmental health. Identifying deposited nitrate that is produced locally vs. that originating from long-distance transport would help inform efforts to mitigate such impacts. However, distinguishing the relative transport distances of atmospheric nitrate in urban areas remains a major challenge since it may be produced locally and/or be transported from upwind regions. To address this uncertainty we assessed spatiotemporal variation in monthly weighted-average Δ^17O and δ^15N values of wet and dry nitrate deposition during one year at urban and rural sites along the western coast of the northern Japanese island of Hokkaido, downwind of the East Asian continent. Δ^17O values of nitrate in wet deposition at the urban site mirrored those of wet and dry deposition at the rural site, ranging between ∼ +23 and +31 ‰ with higher values during winter and lower values in summer, which suggests the greater relative importance of oxidation of NO2 by O3 during winter and OH during summer. In contrast, Δ^17O values of nitrate in dry deposition at the urban site were lower (+19 – +25 ‰) and displayed less distinct seasonal variation. Furthermore, the difference between δ^15N values of nitrate in wet and dry nitrate deposition was, on average, 3 ‰ greater at the urban than rural site, and Δ^17O and δ^15N values were correlated for both forms of deposition at both sites with the exception of dry deposition at the urban site. These results suggest that, relative to nitrate in wet and dry deposition in rural environments and wet deposition in urban environments, nitrate in dry deposition in urban environments forms from relatively greater oxidation of NO by peroxy radicals and/or oxidation of NO2 by OH. Given greater concentrations of peroxy radicals and OH in cities, these results imply that dry nitrate deposition results from local NOx emissions more so than wet deposition, which is transported longer distances. These results illustrate the value of stable isotope data for distinguishing the transport distances and reaction pathways of atmospheric nitrate pollution. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Published by Copernicus Publications on behalf of the European Geosciences Union. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Copernicus Publications | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.5194/acp-18-6381-2018 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1680-7324 | |||||
| 書誌情報 |
en : Atmospheric Chemistry and Physics 巻 18, 号 9, p. 6381-6392, 発行日 2018-05-04 |
|||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
