Partitioning and concentration levels of atmospheric ammonia under transboundary air pollution

为了获得西风下跨界空气污染过程中气态氨和颗粒态铵的相分配和浓度水平，于2012年3月、5月和11月在石川县白井和2013年6月至7月在西侧为日本海的鸟取县鸟取县进行了连续多参数大气测量。结果表明，颗粒态氨和气态氨不仅被长距离输送到日本中部和西部。石川县铃津县的铃木连续观测了作为铵的反离子的总硝酸盐(T.NO3)。春季T.NO3浓度最高，冬季最低，尽管这两个季节都有来自亚洲大陆的气团占优势。造成这一结果的一个主要原因是T.NO3的湿沉积。

To obtain phase partitioning and concentration levels of gaseous ammonia and particulate ammonium during transboundary air pollution under westerly winds, continuous muti-parameter atmospheric measurements were made in March, May, and November 2012 at Hakui in Ishikawa Prefecture, and June to July 2013 at Tottori in Tottori Prefecture where their western side is the Sea of Japan. The results suggested that not only particulate ammonium but also gaseous ammonia were transported long-range to central and western Japan.Continuous observations of total nitrate (T.NO3), which is important as a counter anion of ammonium, were performed at Suzu in Ishikawa Prefecture. Spring maximum and winter minimum of T.NO3 concentrations were observed despite of predominance of air masses originated from the Asian continent in both seasons. A main reason of the results would be wet deposition of T.NO3.