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首页> 外文期刊>Aerosol and Air Quality Research >Transboundary Transport of Nitrogen Oxides from the Asian Continent to Fukue Island, Japan: Analyses of Long-Range Transport of Nitrogen Compounds
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Transboundary Transport of Nitrogen Oxides from the Asian Continent to Fukue Island, Japan: Analyses of Long-Range Transport of Nitrogen Compounds

机译：从亚洲大陆到日本福江岛的氮氧化物的跨界运输：氮化合物的远距离运输分析

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To investigate long-range transport and oxidation states of nitrogen compounds from the Asian continent, especially of total odd nitrogen species (NOy), we carried out continuous observations of NOy, total nitrate (T.NO3; the sum of gaseous nitric acid and particulate nitrate) and NOx (= NO + NO2) at Fukue Island, located in westernmost Japan. NOy and T.NO3 exhibited similar seasonal cycles, with maximum concentrations observed during winter-spring seasons, and minimum concentrations during summer. NOx had a seasonal cycle, with maximum and minimum concentrations in winter and summer, respectively; NOxconcentrations also decreased markedly from winter to spring. High-concentration event analyses to assess transboundary pollution of NOy were performed. Transboundary pollution events for NOy were extracted, and classified as either “Case 1” or “Case 2”. Case 1 involved transport of NOy, T.NO3, and NOxfrom the Asian continent to Fukue Island, while Case 2 involved transport of NOy and T.NO3, but not NOx. Case 1 and Case 2 occurred predominantly in winter and spring, respectively. Air mass trajectories indicated that in Case 1, 52% of air masses passed through Korea, while only 5% passed through Korea in Case 2. These results indicate that some NOx emitted from the Asian continent is transported to Fukue Island as NOx, without it undergoing oxidation, reflecting low photochemical activity and/or short transport times.
机译：为了调查亚洲大陆中氮化合物（特别是总奇氮物种（NOy））的远距离迁移和氧化态，我们连续观察了NOy，总硝酸盐（T.NO3;气态硝酸和颗粒物的总和）。硝酸盐）和NOx（= NO + NO2）位于日本最西部的福江岛。 NOy和T.NO3表现出相似的季节性周期，在冬春季节期间观察到最大浓度，而在夏季期间观察到最小浓度。 NOx有一个季节性周期，在冬季和夏季分别具有最大和最小浓度。从冬季到春季，NOx浓度也显着下降。进行了高浓度事件分析以评估NOy的跨界污染。提取了NOy的越境污染事件，并将其分类为“案例1”或“案例2”。案例1涉及NOy，T.NO3和NOx从亚洲大陆到福江岛的运输，而案例2涉及NOy和T.NO3的运输，但不涉及NOx。案例1和案例2主要发生在冬季和春季。空气质量轨迹表明，在案例1中，有52％的空气质量通过韩国，而在案例2中只有5％的空气通过韩国。这些结果表明，亚洲大陆排放的一些NOx是以NOx的形式运输到福江岛的，经历氧化，反映出较低的光化学活性和/或较短的运输时间。

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