A Numerical Study On Acid Rain AndNeutralization By Yellow-sand In East Asia
A Numerical Study On Acid Rain AndNeutralization By Yellow-sand In East Asia
复制标题
东亚地区酸雨与黄沙中和作用的数值研究
DOI：
10.2495/air000121
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
H. Terada
中科院分区：
文献类型：
--
作者：
H. Ueda;Z. Wang;H. Terada
利用空气质量预测模拟系统（AQPMS）研究了东亚地区黄沙对酸雨的中和作用。设计了一种新的黄沙放气模块，以提供有关沙尘载荷的明确信息。与之前对撒哈拉沙漠和澳大利亚沙漠的预测不同，它包括三个主要预测因素，即摩擦速度；地表湿度和主导天气系统。它与AQPMS相连接，由平流、扩散、干湿沉积、气相化学和液相化学组成。预报的pH值、降水的硫酸盐和硝酸盐离子水平以及气态污染物的表面浓度与实测值进行了比较，得到了比较一致的结果。1995年4月的模拟结果表明，黄沙对降水有很强的中和作用。中国北方、韩国和日本的月平均pH值显著增加，增加幅度在0.4 ~ 1.2之间，而中国南方的月平均pH值增加幅度小于0.1。
An Air Quality Prediction Modeling System (AQPMS) was used to investigate the neutralization of acid rain by yellow-sand in East Asia. A new deflation module of the yellow sand was designed to provide explicit information on the dust loading. Different from the previous ones for Sahara and Australian deserts, it included three major predictors, i.e., the friction velocity; the surface humidity and the predominant weather system. It was linked to AQPMS, which consisted of the advection, diffusion, dry and wet deposition, gas-phase chemistry and the liquid-phase chemistry. The predicted pH values and sulfateand nitrate-ion levels of precipitation, together with the surface concentrations of gaseous pollutants, were compared with measured values and a reasonable agreement was obtained. The simulation results of April 1995 exhibited a strong neutralization of the precipitation by the yellow-sand. The monthly mean pH values in the northern China, Korea and Japan showed a remarkable increase of 0.4-1.2, while the increase in the southern China was less than 0.1.