辽宁省辽中降水化学特征与边界层流场的相关性  

Correlation Between Chemical Characteristics of Precipitation and Flow Field of Atmospheric Boundary-Layer in Liaozhong,Liaoning Province

作　　者：刘厚凤[1] 陈义珍[2] 柴发合[2] 张萌[2] 刘遵永[1] 汪凯庆[1] 

机构地区：[1]山东师范大学人口.资源与环境学院,山东济南250014 [2]中国环境科学研究院,北京100012

出　　处：《环境科学研究》2010年第5期533-538,共6页Research of Environmental Sciences

基　　金：国家重点基础研究发展计划(973)项目(2005CB422202)

摘　　要：于2007年2月—2008年1月在辽宁省辽中县进行了酸雨观测,获取了辽中站降水中主要化学离子组成,并观测了同期的地面气象条件,结合不同气象流场分析方法,分析降水化学特征与边界层流场的关系.结果表明:①降水酸碱性与风向有一定关系,偏南风易出现酸性降水,而偏北风易出现碱性降水,降水的酸碱性与850～925 hPa(约700～1 500 m)高度上的风向相关性较强,与近地面风向的相关性不明显;②降水的酸碱性和离子组成与研究区所处天气系统的相对位置关系显著,同是偏北气流,如研究区位于大陆反气旋东部,气流来源于西北地区,Ca2+浓度较高,反之,如位于海洋气旋的西部,由于气流来源于东南海上,故Na+浓度相对较高.Based on the chemical composition of principal ions in acid rain（from February 2007 to January 2008） at a meteorological station located in Malong Village in Liaozhong County of Liaoning Province in northeatern China and ground meteorological conditions during the corresponding period,the correlation between chemical characteristics of precipitation and flow field of the atmospheric boundary-layer was analyzed by different analytical methods on meteorological flow fields.The results indicated that： ① pH of the precipitation had a relationship with wind direction as follows： southerly wind brings more acid precipitation,but alkaline precipitation dominates during northerly wind;precipitation acidity and wind direction in the 850-925 hPa（700-1500 m） height had a strong correlation,and its relationship with near-surface wind direction was not significant;② there was a more significant relationship between pH and ionic composition of precipitation and relative positions of regional weather systems,namely,under the conditions of constant northerly airflows,the atmosphere was affected by the northwest,whereas calcium ion concentration was relatively high if the study area was located east of the west side of the continental anti-cyclone.However,if the study area was located west of the east side of the ocean cyclones,the atmosphere was affected by southeast marine,in which sodium ions concentration was relatively high.

关 键 词：酸雨 化学特征 边界层流场 天气系统 辽中 辽宁省 

分 类 号：X517[环境科学与工程—环境工程]