摘要
为进一步掌握江苏省酸性降水的时空分布特点,文章应用经验正交函数法(EOF)对江苏省2008-2011年24个酸雨监测站的数据进行分解,分别得出月降水pH值、月大气降水电导率、月酸雨量场的特征向量分布和时间系数序列。结果表明,应用EOF方法可以很好地揭示酸性降水场的空间分布特征,江苏省降水pH值的第一典型分布场以东部沿海高于西部地区为主,月降水pH值逐年呈波动上升趋势;大气电导率的第一典型分布场呈同位相变化,西部高于中东部地区,季节变化特征明显;酸雨量的第一典型分布场为淮河以南高于淮北地区,具有夏春季高、秋冬季节低的季节变化特点。
To further find out temporal and spatial distribution characteristics of acid rain in Jiangsu Province,data of 24 acid rain monitoring spots during 2008-2011 in Jiangsu Province was analyzed by empirical orthogonal function（EOF）and the feature vector distribution and time coefficient series of precipitation pH,precipitation conductivity and acid precipitation monthly were calculated.Results showed that the first typical distribution of pH in east coast was higher than western and monthly precipitation pH presented a fluctuated upward annually trend.The first typical distribution of precipitation conductivity changed in the same phase.The precipitation conductivity value in western area was higher than eastern and its variation was seasonal.The first typical distribution of acid precipitation in Huaibei area was higher than south of Huaihe River and it had the characteristics of seasonal variation that the value in spring,summer was higher than other seasons.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第1期187-191,共5页
Environmental Science & Technology
基金
江苏气象局科研开放基金(km201105)
关键词
酸性降水
时空分布
经验正交函数
江苏省
acid rain
temporal and spatial distribution
empirical orthogonal function
Jiangsu Province
