The goals of this study are (1) to maintain acid deposition network for conducting a long-term monitoring and data analysis, (2) to maintain the integrated atmospheric mercury and heavy metals monitoring network, collect the dry deposition methods of atmospheric mercury to estimate the mercury dry / wet deposition and compare with the other countries’ monitoring data, (3) to establish and maintain an integrated atmospheric modeling system for studying the long-range transport of air pollutants and local air pollutants in order to assess their impact to Taiwan air quality, and further to provide fundamental information to EPA for air pollution management, (4) to revise the PSI data when extreme air pollution events occur, (5) to investigate the impact of acid rain to the ecosystem’s nutrient cycling, (6) to update and maintain the web site of acid rain study in Taiwan, (7) to promote international and cross-strait cooperation and technical exchanges on regional air pollutant issues. To date, our achievements are highlighted below:  The 1254 samples in 14 stations all over Taiwan were collected in 2016. The average pH for all the samples is 5.55.  The situation of acid rain in Taiwan is slightly improved. Annual average pH values for most of sites are greater than 5.0. The northern Taiwan is still worse than the southern Taiwan.  The fertilize experiment result from Lian-Haw-Chih and Mt. North Tongyen Experimental Forest are expected. The ecosystem at high and low altitude are lacking of nitrogen and phosphorus, respectively. Therefore, the inorganic nitrogen deposition has a positive effect on the growth of high altitude forest but no obvious effect to the low altitude forest. However, the excessive inorganic nitrogen deposition may increase the leaching effect and acidify the soil. This will cause the negative impact on the production of ecosystems.  The web site (http://acidrain.epa.gov.tw) of Taiwan acid rain study has been updated with more information.  We have continued to promote and participate in international collaborations and technical exchanges, for example, Quality Assurance Science Activity Center of UN, and the World Meteorological Organization Global Precipitation Chemistry and Deposition Science Assessment. Meanwhile, Prof. Lin has also visited the Xiamen EPB, Peking University, Chinese Academy of Science and CRAES to discuss about future collaborations. From January 2016, the cross-strait stations, Fuzhou and Matsu have already started to cooperate in acid deposition monitoring and data exchanging. We’ll continue this work in 2017.

long-range transport, acid rain, atmospheric mercury