Studies on acid fog, acid shock induced by melted snow and ecosystem of wetland in the Eastern Hokkaido, Japan

久路的雾持续时间强烈表明自1976年以来厄尔尼诺年的低持续时间。这是由于夏季非季风减弱造成的，与北太平洋高压系统有关，因为厄尔尼诺事件期间它将在日本上空减弱。北海道东部的雨雾酸度每年都在增加，最近夏季雾的酸度经常很高，例如6月份。这些高酸度的雾可能是由太平洋海洋产生的雾造成的，其中含有长期从工业化国家的亚洲大陆运输来的酸性气雾剂。为了评价湿地生态系统和雾雨酸化，对湿地林内外湿沉积的化学性质进行了观测。讨论了雾、降雨频率与化学沉积的关系。

The fog duration time in Kushiro is strongly indicating low in El Nino years since 1976. This is caused by the weakened nonsoon in summer, associated with the North Pacific high pressure system since it will become weaken over Japan during El Nino events.Acidity of rain and fog in the eastern Hokkaido has been increasing every year, and recently the very high acidity of fog has frequently appeared in the summer period, for example, June. These high acidity of fog could be caused by fog generated on the sea of Pacific Ocean and contained of acidic aerozol long-transported from the Asian continent of industrialized countries. In order to estimate the wetland ecosystem, and acidification of fog and rain, chemical properties of wet deposotion inside and outside the forest in the wetland were observed. We discuss the relationship between fog, rain frequency and chemical deposition.