Eleven years (2005–2015) of data from long-term monitoring at a Japanese remote background site in Wajima, were analyzed to investigate temporal trends and sources. Water-soluble inorganic ions (WSIIs) were analyzed for aerosol chemical composition. The total WSIIs concentration was 7.93 ± 3.93 μg/m³, accounting for 42.3% of TSP mass, ranged from 11.4 to 93.9%. SO₄²⁻ is the most abundant ion, contributing a total WSII mass from 18.0 to 79.8%, and non-sea-salt (nss-) SO₄²⁻ contributed from 63.6% to 99.6% of total SO₄²⁻, which was related to human activities on the Asian continent and the effects of marine precursors in spring and summer, respectively. NO₃⁻ and NH₄⁺ contribute 6.3 and 7.4% of the total WSIIs and were affected by long-range transport and local sources as well. The increasing trend of Na⁺ and Cl⁻ indicates the increased influence of sea salt, which is caused by more frequent strong winds. K⁺ is mainly produced from biomass burning with a stable seasonal variation, Ca²⁺ as the characteristic ion of dust has the highest concentration in spring. Mg²⁺ comes from minerals and marine sources during spring and summer, respectively. This work describes in detail the annual change trend of the WSIIs of atmospheric particles in the Wajima area, seasonal characteristics, and source contributions, provide a comprehensive understanding of long-term variation in atmospheric particulate.

分析了在Wajima的一个日本遥远背景站点进行的长期监测的11年（2005-2015年）数据，以调查时间趋势和来源。分析了水溶性无机离子（WSII）的气溶胶化学成分。WSII的总浓度为7.93±3.93μg/ m ³，占TSP质量的42.3％，范围为11.4至93.9％。SO ₄ ^2-是最丰富的离子，占总WSII质量的18.0至79.8％，非海盐（nss-）SO ₄ ^2-占总SO ₄ ^2-的63.6％至99.6％，与亚洲大陆上的人类活动以及春季和夏季海洋前体的影响有关。NO ₃ ^-NH ₄ ⁺和NH ₄ ⁺分别占总WSII的6.3％和7.4％，并且还受到远程运输和本地资源的影响。娜的增加趋势⁺和Cl ^-表示海盐，这是更频繁的强风造成的影响增大。K ⁺主要是由生物质燃烧产生的，具有稳定的季节变化，Ca ²⁺作为粉尘的特征离子在春季浓度最高。镁²⁺在春季和夏季分别来自矿物和海洋资源。这项工作详细描述了轮岛地区大气颗粒物WSII的年度变化趋势，季节特征和源贡献，从而全面了解了大气颗粒物的长期变化。