Here, we present preliminary observations of the free tropospheric aerosols (particles) intercepted at the Observatory in 2015, 2016 and 2017. These particles were likely transported for long distances over the Atlantic from surrounding continents.
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The following graphs depict the atmospheric aerosol number concentration (particles of size above 0.3 micrometers in green and 0.4 micrometers in blue) time series.
The particle counter stopped running on August 3rd, but the scattering data (below) are still acquired.
Aerosol Light Scattering
The following graphs depict the time series of the aerosol ability to scatter solar radiation (at three different wavelengths: blue, green and red), which is a climate-relevant aerosol measurement.
Disclaimer: Data shown here are only minimally processed and quality controlled (for additional information please contact Claudio Mazzoleni: cmazzoleni(at)mtu.edu).