【作者】 李爱华； 袁野； 周述学； 吴汪毅； 王磊； 纪雷；

【Author】 LI Aihua 1,2 , YUAN Ye 1 , ZHOU Shuxue 1 , WU WangYi 1 , WANG Lei 1 , JI Lei 1 1 Anhui Weather Modification Office, Hefei 230031 2 Key Laboratory of Cloud Physics and Environment of China Meteorological Administration, Beijing,100081

【机构】 安徽省人工影响天气办公室； 中国气象局云雾物理环境重点开放实验室；

【摘要】 本文利用美国的CCN计数器于2008年4-7月、2009年5-8月和2011年的观测数据分析了黄山光明顶的成云凝结核的特征。经分析发现晴天时ccn数浓度偏高,有雾和降水时CCN数浓度明显偏小,降水过程对CCN有明显的冲刷作用。黄山光明顶ccn数浓度在0-10000个/cm3,日平均ccn最小数浓度为几十个,最大为10000个/cm3左右。按照Hobbs对CCN活化谱的经验NCCN=ESK中E、K值把核谱分为大陆型(E≥2200cm-3,K<1)、过渡型(1000<E<2200,K>1)、海洋型(E<1000cm-3,K<1)三种类型核谱的标准来分析黄山光明顶每日的活化谱型,在188天有效的观测日中有113天确定系数在0.9以上,说明拟合效果较好,其中大陆型核谱为48天,占42.5%,海洋型核谱为15天,占13.3%,大陆型向海洋型过渡核谱为50天,占44.2%,黄山光明顶CCN核谱为过渡性和大陆型核谱为主,同时指出黄山光明顶CCN数浓度晴天时有明显的日变化特征,主要变现为:清晨核浓度具有极小值,约8:00以后核数浓度由明显的增加,中午前后核浓度为极大,下午数浓度由重新减少,至16:30左右大达到极小值,随后增加,至20点前后达到极大值,深夜以后核浓度明显偏小,总体来看在人类活动期间核数浓度较大。更多还原

【Abstract】 This article analyzed the characteristics of Cloud Condensation Nuclei(CCN) on Brightness Apex in Huangshan, based on the observation data using American CCN counter during April to July 2008, May to August 2009 and 2011.It found that number concentration of CCN is high on clear days, while obviously low on foggy or rainy days. Precipitation Processes have washout effect on CCN. Number concentration of Brightness Apex’s CCN is between 0-105/cm3. The average daily minimum is only a few dozen, and the maximum value is almost 105/cm3.According to the three types of nuclear spectrum proposed by Hobbs , which were divided by the empirical formula N CCN =ES K into Continental(E≥2200cm-3,K<1), Transitional (1000<E<2200,K>1) and Oceanic (E<1000 cm-3,K<1), this article also analyzed daily activation of spectral type on Huangshan Bright Summit. And the fitting results show well that there are 113 days in the 188 days of observation that the determinate coefficients are above 0.9,in which the nuclear spectrum of Continental, Oceanic and Transitional accounts 48(42.5%),15(13.3%) and 50 days (44.2%) respectively. Besides, the results show that the CCN nuclear spectrum are mainly Continental and Transitional and the number of CCN have apparent daily variation in a sunny day on Huangshan Bright Summit.更多还原