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Online Seminar
A global distribution of major aerosol components: sea salt and stratospheric particles
Nov. 06, 2019, 16:00 - 17:00
University of Leeds

At NOAA we have measured the composition of single particles in the atmosphere. We have explored the composition of particles over a wide range of altitudes and latitudes. Our group has recently developed techniques to combine single particle composition with data from optical particle counters in order to retrieve quantitative, size-resolved aerosol composition.  In this talk I will focus on the highest and lowest altitude particles.

Stratospheric particles differ depending on where they were formed. Some time ago we were able to estimate the influx of meteors from these data. More recently we have explored whether the meteoric metals are in solid form or in dissolved in liquid particles. The data also yield quantitative abundances for particles in the lower stratosphere and show that tropospheric particles play an important role in the lower stratosphere, with probable anthropogenic influence. Particles that were formed in the stratosphere are consistently larger than particles transported up from the troposphere.  There is possible evidence of occasional transport from Asia into the lowermost stratosphere.

This event is part of the eventgroup ICAS External Seminar
Dan Murphy

University of Leeds
University of Leeds
Mail:M VanDerGuchtSgx4∂leeds ac uk
Scientific Staff
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