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。这个项目涉及研究春季在遥远的北极大气中产生的新颗粒，因为冬季积累的污染物在光化学活动开始时被迅速处理。这项研究将包括在NCAR C-130上对超细颗粒光谱和凝聚核进行航空测量，这是对流层臭氧产生关于春分(TOPSE)计划的一部分。超细颗粒测量将与气相硫酸的同步测量相结合，这将提供对新颗粒形成和颗粒生长的物理/化学机制的洞察。

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.