Panayiotis Kalkavouras

TL;DR: In this paper, a field evaluation of Purple Air PA-II devices (low-cost, compact, particulate matter (PM) sensors) is performed in two urban environments and across three seasons in Greece, in comparison to different types of reference instruments.

TL;DR: In this paper, the authors examined how new particle formation (NPF) in the eastern Mediterranean in summer affects CCN (cloud condensation nuclei) concentrations and cloud droplet formation, and they found that NPF can double CCN number (at 0.1% supersaturation), but the resulting strong competition for water vapor in cloudy updrafts decreases maximum supersaturation by 14% and augments the potential droplet number only by 12%.

TL;DR: In this paper, the effects of a 7-week lockdown in the Greater Area of Athens, coupled with in situ observations with estimations from a meteorology-atmospheric chemistry model, were assessed.

TL;DR: In this article, the impact of new particle formation (NPF) on cloud formation and droplet number concentration (CDNC) in the Eastern Mediterranean region was investigated. But the authors focused on the early stages of the process of droplet formation.

TL;DR: In this paper, the authors presented the longest time series of Atmospheric New Particle Formation (NPF) records in the eastern Mediterranean region by analyzing 10 years of aerosol number size distribution data obtained with a mobility particle sizer.