【作者】 马帅帅； 杨溦； 庞树峰； 张韫宏；

【Author】 MA Shuai-shuai;YANG Wei;PANG Shu-feng;ZHANG Yun-hong;Institute of Chemical Physics,Beijing Institute of Technology;

【机构】 北京理工大学化学物理研究所；

【摘要】 大气气溶胶的吸湿性对太阳光散射、云的形成和大气化学有很重要的影响。研究采用真空型傅里叶变换红外光谱仪和脉动湿度控制系统实现了环境相对湿度(RH)和气溶胶颗粒质量增长因子(MGF)的直接测定,测量的时间分辨率可达0.12 s。为了验证该方法的准确性,本研究测定了NaCl颗粒的吸湿曲线和风化动力学过程。实验结果与EAIM(Extended AIM Aerosol Thermodynamics Model)预测值表现出了良好的一致性。更多还原

【Abstract】 The hygroscopicity of atmospheric aerosols has a significant effect or light scattering,cloud formation and atmospheric chemistry.In this work,we introduce a new method to directly determine mass growth factor(MGF) of aerosols and ambient relative humidity(RH) with a subsecond time resolution of 0.12 s,using a rapid scan vacuum FTIR combined with a RH controlling system.To illustrate the accuracy of this approach,NaCl was chosen to study the water cycle and stepwise efflorescence process.All experimental results show excellent agreement with theoretical data from EAIM(Extended AIM Aerosol Thermodynanics Model).更多还原