摘要
利用广州酸雨观测站2008年-2012年的酸雨观测数据,分析广州市年、月、季平均酸雨pH值及酸雨发生频率,并对广州市酸雨变化情况进行分析总结,结果表明:五年中广州的年酸雨平均pH值为4.48,年平均发生频率为75.8%。年平均酸雨最大pH值为4.67,年平均酸雨最小pH值为4.22。酸雨发生频率最高是2009年,为95.9%,最低则是2012年,为82.3%。按照酸雨PH值标准划分来看,2008至2010年年平均pH值属于较强酸性降水,而2011至2012年年平均pH值属于弱酸性降水。月平均酸雨最大pH值出现在11月,pH值为4.71,月平均酸雨最小pH值出现在2月,pH值为3.29;而酸雨频率月变化则可以看出6月份酸雨发生频率最高,为90.4%,而10月份酸雨发生频率最低,为44.0%。按季节分析,广州市秋季降水pH值最高,冬季降水pH值最低,秋季出现酸雨频率最小,冬季出现酸雨频率最大。四季轻雾日数与降水pH值呈显著的负相关,与酸雨频率呈显著的正相关。对风速与酸雨平均pH值分析,说明风速增大时,容易造成外来污染物的入侵,使污染加剧,酸雨平均值减小,酸雨频率增大。而雨量的变化对四季酸雨平均pH值有着显著的影响。
Based on the acid rain observatory data of Guangzhou during 2008-2008, Guangzhou annual, month, season average pH of acid rain and its frequency were analyzed ,and the change of the acid rain was summarized, the results show that the in Guangzhou the average pH value of acid rain is 4.48 in five years, the annual average frequency is 75.8%.Annual average acid pH value is 4.67, largest minimum annual average acid pH value is 4.22.The occurrence frequency of acid rain is highest in 2009, at 95.9%, the lowest is 82.3% in 2012.According to the acid rain PH value standard, 2008-2010 annual average PH value belongs to the strong acid precipitation, and annual average PH value belongs to the weak acid precipitation from 2011 to 2012. Monthly average largest pH value of acid rain, in November, is 4.71, average monthly minimum pH value of acid rain, in February, is 3.29;While in the change of the frequency of acid rain, it can be seen that the highest frequency of acid rain, in June, is 90.4%, the lowest and the frequency of acid rain, in October, is 44.0%. Analysis according to the season, the highest pH is in the autumn, in winter is the lowest, the lowest the frequency of acid rain is in autumn, while is the largest is in winter. Fog days are negatively related to the precipitation of the pH value, and the frequency of acid rain has significant positive correlation. Analysis of wind speed and the average pH value of acid rain indicated that it＇s easy to cause the invasion of foreign pollutants, when the wind speed increases.
出处
《气象研究与应用》
2014年第2期52-56,共5页
Journal of Meteorological Research and Application
关键词
酸雨平均pH值
酸雨频率
轻雾日数
风速
雨量变化
the average pH value of acid rain
acid rain frequency
light fog days
wind speed
changes in rainfall
