期刊文献+

干旱区云凝结核分布及其影响因子的观测研究 预览 被引量:9

Observational study on the distribution of cloud condensation nuclei and its causes in drought region
在线阅读 下载PDF
收藏 分享 导出
摘要 利用DMTCCN仪对宁夏盐池、银川地区地面及高空的云凝结核(CCN)进行实时连续观测.大量资料分析结果表明,CCN日变化明显,受人为因素影响,清晨和傍晚出现高值.夜晚温度与CCN浓度呈正相关,白天相反;强降水对CCN具有一定冲刷作用;沙尘气溶胶没有有效增加盐池地区的CCN浓度.与华北地区比较,银川、盐池地区CCN浓度偏低.此外,研究表明,过饱和度越高,活化CCN浓度越大.根据N=CSK拟合活化谱,银川属于典型大陆性核谱.由于云内清除作用,高空CCN浓度下降明显,但逆温层的存在使得该区CCN浓度累积增加. Using a droplet measurement technologies (DMT) cloud condensation nuclei (CCN) counter,distributions of CCN on the ground and in the air in Yanchi and Yinchuan of Ningxia Hui Autonomous Region were obtained.It was concluded that CCN had a distinctive diurnal cycle.The high concentration appears in the early morning and evening,affected by human activities.There was a positive correlation of CCN concentration with temperature during the day,and a negative correlation at the night.Heavy rainfall had a scavenging effect on CCN concentration,while dust aerosol did not increase CCN concentration effectively.With respect to other regions in North China,the CCN concentration in Yanchi was relatively low.With increasing supersaturation,more particles were activated.According to the expression N=CS k,the fitted spectra parameters in Yinchuan showed continental characteristic.In the air,CCN concentration decreased with height,especially in the cloud,which was due to scavenging while an inversion layer tended to increase CCN concentration.
作者 岳岩裕 牛生杰 桑建人 吕晶晶 YUEYan-yu,NIU Sheng-jie,SANG Jian-ren,Lü Jing-jing (1.Key Laboratory of Meteorological Disaster of Ministry of Education,School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China;2.Ningxia Academy of Meteorological Science,Yinchuan 750002,China)
出处 《中国环境科学》 EI CAS CSCD 北大核心 2010年第5期 593-598,共6页 China Environmental Science
基金 国家“973”项目(2006CB403706) 气象灾害省部共建教育部重点实验室基金(KLME05006)
关键词 干旱区 云凝结核 气象要素 高空观测 drought region cloud condensation nuclei meteorological condition upper-air observation
作者简介 作者简介:岳岩裕(1985~),女,山东威海人,南京信息工程大学大气物理学院硕士研究生,主要从事云降水物理学研究,发表论文1篇. 责任作者,教授,niusj@nuist.edu.cn
  • 相关文献

参考文献14

二级参考文献85

共引文献56

同被引文献205

引证文献9

二级引证文献74

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈
新型冠状病毒肺炎防控与诊疗专栏