摘要:
用聚类分析法比较了西南地区云水和雨水的化学组成。组成中若包括如H2O2,S（Ⅳ）等活性组分,云水组成不同于雨水组成,因为云水中H2O2浓度高。若其中不包括活性组分,云水组成类似于典型农村地区或城市上风点除第一分段雨样外的分段降雨组成。重污染区,如贵阳市区和重庆市区的降雨组成不同于云水组成,云下洗脱对该地区的降雨酸化可能起着重要作用。观察到云水、雨水组成在冷峰过境前后的不同。
Abstract:
The chemical composition of cloud-water and rainwater of Southwestern China is compared by Cluster Analysis Approach. If active components, such as H2O2, S (IV), were included, the rainwater composition was very different from that of cloud-water, because of high level of H2O2 in cloud-water. If active components were not included the composition of cloud-water was similar to that of sequential rainwater samples, except the first one, collected at typical rural sites or suburb of upwind. The rainwater composition of heavy polluted region, for example Guiyang City and Chongqing City, was very different from that of cloud-water, the below-cloud scavenging might play an important role for the acidification of rain in the region. The difference of chemical composition of rainwater or cloud-water before and after a cold front was also observed.
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