Aerosol number distributions from Kaashidhoo Climate Observatory

PI : Glenn Shaw, University of Alaska Fairbanks
shaw@gi.alaska.edu

Student (now collaborator) : Will Cantrell, (now at) Indiana University
wcantrel@indiana.edu

Instrumentation
TSI Scanning Mobility Particle Sizer
Size resolution : Diameter 20nm to 530nm
Time resolution : 5 minutes
Relative humidity : Sheath air in DMA dried with mol sieve
CliMET Optical Particle Counter
Size resolution : 0.3 µm to 10 µm
Time resolution : variable
RH : Sheath air dried with mol sieve
No impactor

As you can see, there is a large discrepancy between the SMPS data and the OPC. The reason is currently unknown, but tests are underway to resolve it. We do see occasional "spikes" in the distributions as the result of local contamination (village, passing dhonis, etc…)  The data displayed above is from February 20, 1 hour before and after the C130 flyby at 10:31.