International Workshop on Comparing Ice Nucleation Measuring Systems 2014 (ICIS 2014) #3

该项目是一个由三部分组成的讲习班的第二部分，目的是提高与更好地了解大气中冰粒的形成有关的科学知识。这次研讨会将在卡尔斯鲁厄理工学院的大气气溶胶相互作用和动力学(AIDA)进行，这是世界上在受控环境下产生冰云的最先进的设施。目前，人们对大气中冰核粒子的组成和浓度以及冰粒子与云层之间的关系了解甚少。本研讨会将通过共同定位和比较进行这些测量的不同仪器来讨论冰核颗粒数密度的测量。由于冰核在很大程度上控制了降水，这项工作可以通过更好地预测降雨和降雪为社会带来重大好处。研讨会的第一部分于2014年11月在AIDA举行，几种测量颗粒组成的仪器在实验室进行了测试和比较。第三部分将在沙漠研究所的风暴峰实验室进行，这是一个不受当地排放影响的高海拔地点，来自冰核仪器的测量结果将在现场进行比较。讲习班的重点是：(1)颗粒如何成冰的微观物理；(2)结冰颗粒的数量与温度和相对湿度等大气特性的函数关系；(3)结冰颗粒的大气分布；(4)人类活动在产生或改变结冰颗粒行为方面的作用。该项目可在冰核颗粒测量技术和对冰核形成过程的理解方面取得突破。

This project is the second part of a three-part workshop to improve scientific knowledge related to developing a better understanding of the atmospheric formation of ice particles. This workshop will take place at Aerosol Interaction and Dynamics in the Atmosphere (AIDA) at the Karlsruhe Institute of Technology, the world's foremost facility for producing ice clouds in a controlled setting. There is currently a poor understanding of the composition and concentration of ice-nucleating particles in the atmosphere and of the relationship between ice particles and clouds. This workshop will address the measurement of ice nucleating particle number density by co-locating and comparing different instruments making these measurements. Because ice nucleation largely controls precipitation, this work could provide major benefits for society by enabling better predictions of rain and snowfall.Part 1 of the workshop took place in November 2014 at AIDA where several instruments that measure particle composition were tested and compared with each other in the laboratory. Part 3 will take place at the Desert Research Institute's Storm Peak Laboratory, a high elevation site not subject to local emissions, where measurements from ice-nucleating instruments will be compared at a field site. The workshop focuses on: (1) the microphysics of how particles nucleate ice, (2) the number of ice forming particle as a function of atmospheric properties such as temperature and relative humidity, (3) the atmospheric distribution of ice forming particles and (4) the role of anthropogenic activities in producing or changing the behavior of ice forming particles. The project could provide a breakthrough in ice-nucleating particle measurement technology and in the understanding of ice-nucleating processes.