Simulated impacts of SO2 emissions from the Miyake volcano on concentration and deposition of sulfur oxides in September and October of 2000
Simulated impacts of SO2 emissions from the Miyake volcano on concentration and deposition of sulfur oxides in September and October of 2000
复制标题
2000年9月和10月三宅火山SO2排放对硫氧化物浓度和沉积的模拟影响
DOI：
10.1016/s1352-2310(03)00327-3
复制
发表时间：
2003
影响因子：
5
通讯作者：
M. Iwata
中科院分区：
文献类型：
--
作者：
Junling An;H. Ueda;K. Matsuda;Hisashi Hasome;M. Iwata
一个区域空气质量欧拉模型运行了2个月（2000年9月和10月），有和没有SO2排放的三宅火山SO2和硫酸盐浓度和总硫沉积周围地区的火山排放的变化的影响进行调查。火山排放物以不同比例注入行星边界层内的不同模型层，而其他排放物则在地面上方的第一个模型层中释放。每天四次的气象场取自国家环境预报中心（NCEP）。EANET（Acid Deposition Monitoring Network in East Asia）的8个日本监测点被用于模型评估。模拟结果表明，从三宅火山排放导致周围地区的SO2和硫酸盐浓度的增加，在PBL的下风处分别高达300%和150%，和那些在SO2水平在该地区发现的390公里以北的三宅网站在自由对流层（FTR）高达120%。每月的硫沉积总量也增加了300%。每日SO2浓度在不同的模型层显示强烈的变化（10-450%），在网站显着影响的火山。比较表明，RAQM模型预测的每日SO2变化在相对干净的网站比那些在内陆网站更接近火山和模型很好地捕捉到的SO2峰值的时间所造成的巨大变化，从三宅火山在大多数选定的网站和每月模拟的雨水中硫酸盐浓度同意相当不错的观测与2倍内的差异。提高气象数据的空间和时间分辨率，消除其他火山喷发的不确定性，可能会改善模拟。
A regional air quality Eulerian model was run for 2 months (September and October of 2000) with and without SO2emissions from the Miyake volcano to investigate effects of the changes in the volcanic emissions on SO2and sulfate concentrations and total sulfur deposition around the surrounding areas. Volcanic emissions were injected into different model layers in different proportions within the planetary boundary layer whereas the other emissions were released in the first model layer above the ground. Meteorological fields four times per day were taken from National Centers for Environmental Prediction (NCEP). Eight Japanese monitoring sites of EANET (Acid Deposition Monitoring Network in East Asia) were used for the model evaluation. Simulations indicate that emissions from the Miyake volcano lead to increases in SO2and sulfate concentrations in the surrounding areas downwind in the PBL by up to 300% and 150%, respectively, and those in SO2levels in the area found ∼390 km north away from the Miyake site in the free troposphere (FTR) by up to 120%. Total sulfur deposition amounts per month are also increased by up to 300%. Daily SO2concentrations in different model layers display strong variability (10–450%) at sites significantly influenced by the volcano. Comparison shows that the RAQM model predicts daily SO2variations at relatively clean sites better than those at inland sites closer to volcanoes and the model well captures the timing of SO2peaks caused by great changes in SO2emissions from the Miyake volcano at most chosen sites and that monthly simulated sulfate concentrations in rainwater agree quite well with observations with the difference within a factor of 2. Improvement in spatial and temporal resolutions of meteorological data and removal of the uncertainty of other volcanic emissions may better simulations.