摘要
为保证湿沉降监测数据的可靠性及国际间数据的可比性，对不同类型湿沉降临测的离子平衡参数（R1）的参考值XR1，的范围进行了计算和分析。结果表明，XR1的取值主要受降水中离子组成、离子浓度以及监测准确性的影响不同类型降水的XR1的取值范围有所差别，同一类型降水的XR1也会因降水中总离子浓度的差别而不同，降水中总离子浓度（C＋A）〉100μeq／L时，海陆相间型降水的XR1的取值范围为5％～7％；内陆型降水的XR1的取值范围为5％～9％；海洋型降水XR1的取值范围为5％～11％，当（C＋A）〈50μeq／L时，总离子浓度越小，实验的精密度越差，离子浓度的精密度（αi）值越大．当αi取100％时，XR1的取值范围为33％-71％，国际间同类降水监测规范比较，（C＋A）≥50μeq／L时，R1的取值基本在XR1的计算范围内；而（C＋A）〈50μeq／L时，各个标准之间的差别较大。
In order to ensure the reliability of wet deposition monitoring data and the comparability of international data, the range of different types of wet deposition monitoring ion balance parameter RI which was defined as XR1 was calculated and analyzed. The value of XR1 was affected mainly by the ion composition, total ion concentration （C＋A） （cations ＋ anions） and the accuracy of monitoring. The range of XR1 values of different types of precipitation differed a little, while XR1 of same type of precipitation could defer, due to the difference of total ion concentration in precipitation. When the total ion concentration in precipitation was （C＋A）〉100μeq/L, the range of XR1 value of ocean and continent type deposition, continent type and ocean type precipitation were 5%-7%, 5%-9% and 5%-11%, respectively. When（C＋A）〉50μeq/L, the smaller the total ion concentration, the worse the test accuracy, the greater αi the value; when ai was 100%, the range of XR1 value range was 33%-71%. Compared with the international same type precipitation monitoring system, the R1 value was basically in the range of calculation when （C＋A）≥50μμeq/L; while when （C＋A）〈50μeq/L, the variation between each criteria was great.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2006年第5期627-631,共5页
China Environmental Science
基金
国家"973"项目(2005CB422203)
关键词
湿沉降
离子平衡
平衡参数
精密度
wet deposition
ion balance
balance parameter
accuracy
