Articles | Volume 15, issue 21
Atmos. Chem. Phys., 15, 12487–12517, 2015
https://doi.org/10.5194/acp-15-12487-2015

Special issue: Monitoring atmospheric composition and climate, research in...

Atmos. Chem. Phys., 15, 12487–12517, 2015
https://doi.org/10.5194/acp-15-12487-2015

Research article 10 Nov 2015

Research article | 10 Nov 2015

A multi-year study of lower tropospheric aerosol variability and systematic relationships from four North American regions

J. P. Sherman et al.

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Short summary
Variability in aerosol optical properties relevant to radiative forcing were studied on several timescales at four continental North American NOAA-ESRL sites. Light scattering and intensive properties varied most on seasonal scales while absorption variability on weekly and diurnal timescales was comparable to its seasonal variability. Large reductions in light scattering were observed at the two long-term sites (relative to late 1990s), along with a smaller contribution by sub-1µm particles.
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