6:15 PM - 7:30 PM
[AHW26-P06] The characteristics of mercury deposition on to forest ecosystem observed in Yakushima Island
Keywords:Yakusima, mercury, forest ecosystem, Asia monsoon, precipitation
Study sites are located at a height of 200 m and 1600 m above sea level of the broad-leaved evergreen forest in the western area of Yakushima Island, respectively. In 200 m experimental site, the experiment was conducted at a 100 m x 100 m experimental site around the observation tower. We installed automatic rain samplers which can collect rain water every 10 mm precipitation, bulk deposit samplers (within canopy and without canopy) and groundwater collecting devise, respectively. In addition, we sampled stream water which flow down near the observation tower. In 1600 m experimental site, we installed automatic rain samplers. These experiments are conducted during 2011-2014 sampling campaign and each samples are collected once a month basis. Hg, major ions, and DOC were analyzed. From these result we will discuss the characteristics of Hg deposition in Yakushima Island.