查书平,陈建民,成天涛,董艳,胡秀芳
ZHA Shuping,CHEN Jianmin,CHENG Tiantao,DONG Yan,HU Xiufang

• 1:芜湖职业技术学院人文旅游学院
• 2:复旦大学环境科学与工程系
• 3:南通大学地理科学学院

摘要(Abstract)：

利用2009—2013年上海市降水量数据、上海市近地面云凝结核(cloud condensation nuclei,CCN)数据、K+浓度数据和农业秸秆露天焚烧火点数据,分析秸秆露天焚烧期间上海市CCN及降水分布特征。结果表明:受周边秸秆露天焚烧的影响,上海市近地面CCN日分布规律呈现单峰或多峰型的分布特征,秸秆焚烧影响日的CCN浓度明显高于非影响日的浓度,秸秆焚烧排放扩散的后期烟流比早期烟流更易活化成CCN;秸秆焚烧期间上海市降水分布呈现夏收季节降水普遍高于秋收季节,夏收的降水频次明显高于秋收,秸秆焚烧期间上海市降水均以小雨为主,年际变化呈现夏收为"W"型而秋收为"U"型的变化趋势;另外,通过对上海市多年受秸秆焚烧影响的天数与降水进行相关性分析,发现农业秸秆露天焚烧主要有助于促进上海市的小雨和大暴雨形成而对中雨具有抑制作用。可见,农业秸秆露天焚烧不仅影响环境空气质量,而且对区域气候有着显著的影响。
In this paper, the distribution characteristics of cloud condensation nuclei(CCN) and precipitation in Shanghai during the period of straw burning in the open air were analyzed by using the precipitation data, ground CCN data,K+concentration data and agricultural straw burning fire point data from 2009 to 2013 in Shanghai. The results showed that the daily distribution of CCN near the ground in Shanghai was single peak or multi peak, the concentration of CCN on the straw burning day was significantly higher than that on the non-burning day, and the later smoke flow of straw burning emission diffusion was easier to be activated into CCN than that in the early phase; the precipitation distribution in Shanghai during straw burning showed that the precipitation in summer harvest season was generally higher than that of autumn harvest and the precipitation frequency of summer harvest was significantly higher than that of autumn harvest. During the period of straw burning, there was mainly light rain in Shanghai, and the annual change was the "W" type of summer harvest and the "U" type of autumn harvest. In addition, through the correlation analysis of the days affected by straw burning and the precipitation in Shanghai for many years, it is found that the agricultural straw burning in open air has contributed to the formation of the light rain and the heavy rain in Shanghai but has a restraining effect on the moderate rain. It can be concluded that the straw burning in the open air not only affects the air quality, but also has a significant impact on the regional climate.

关键词(KeyWords)： 秸秆露天焚烧;上海市;云凝结核;降水
straw burning in the open air;Shanghai;cloud condensation nuclei;precipitation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（41475109,41601189,41701634）;; 安徽省高校自然科学重点研究项目（KJ2019A0984）;; 生态环境部大气重污染成因与治理攻关项目（DQGG-05-32）;; 芜湖职业技术学院高层次人才科研启动资金项目（wzyrc201701）;芜湖职业技术学院科技创新团队项目（wzykjtd202001）;; 安徽省职业与成人教育科研规划重点课题（Azcj001）

作者(Author): 查书平,陈建民,成天涛,董艳,胡秀芳
ZHA Shuping,CHEN Jianmin,CHENG Tiantao,DONG Yan,HU Xiufang

DOI: 10.12194/j.ntu.20200326001

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