【摘要】 根据广东省气象部门所属4个酸雨监测站10多年的资料,研究了广东省降水pH值、酸雨频率的时空分布特征及其影响因素。分析结果表明,广州、韶关和电白的酸雨频率都在56%以上,降水pH年均值小于4.9,汕头的酸雨虽然较轻,但降水pH年均值仍小于5.6,酸雨频率也达到31.7%。4个站均表现出春季降水pH值低、酸雨频率高的季节分布特征。近年来,广州、韶关、汕头的降水pH值变化不大,酸雨频率却呈上升趋势。广东酸雨的形成不仅与SO2排放量高、气溶胶酸化缓冲能力低有关,也与天气系统和气象条件有关。更多还原

【Abstract】 With the observed data in four acid stations affiliated to the meteorological department of Guangdong during 1992～2004,temporal and spatial distribution of pH in rain,acid rain frequency and affecting factors were studied.The results showed that yearly average rain frequencies were all more than 56%,pH in rain less than 4.9 in Guangzhou,Shaoguan and Dianbai.Although acid rain was relatively light in Shantou,its yearly average pH in rain was still less than 5.6,acid rain frequency also amounted to 31.7%.In recent years,pH values in rain have changed little while acid rain frequencies have increased in Guangzhou,Shaoguan and Shantou.The formation of acid rain was not only related to SO2 concentration in the atmosphere and lower buffering capacity of aerosol,but also to synoptic systems and weather conditions.更多还原