Airborne Studies of New Particle Formation During the Arctic Winter/Spring Transition

人们对新粒子在大气中成核的过程知之甚少。 该项目涉及研究遥远的北极大气在春季产生的新粒子，冬季积累的污染物在春季由于光化学活动的开始而迅速得到处理。 该研究将涉及NCAR C-130上的超细颗粒尺寸光谱和凝结核的空中测量，作为春分对流层臭氧生产（TOPSE）计划的一部分。 超细颗粒测量将与气相硫酸的同时测量一起进行，这将提供对新颗粒形成和颗粒生长的物理/化学机制的深入了解。

The process by which new particles nucleate in the atmosphere are poorly understood. This project involves the study of new particle production in the remote Arctic atmosphere during spring, when the pollutants accumulated over the wintertime are rapidly processed by the onset of photochemical activity. The study will involve airborne measurements of ultrafine particle size spectra and condensation nuclei aboard the NCAR C-130 as part of the Tropospheric Ozone Production about the Spring Equinox (TOPSE) program. The ultrafine particle measurements will be made in conjunction with simultaneous measurements of gas phase sulfuric acid, which will provide insight into the physical/chemical mechanisms of new particle formation and particle growth.