1. Black Carbon Measurements at Whistler Sarah Hanna (UBC)

2. The Whistler Peak High Elevation Research Site Located at 50.06°N and 122.96°W and at 2182m Environment Canada (ec.gc.ca)

3. The Single Particle Soot Photometer (SP2) Measures refractory black carbon (rBC) in individual aerosol particles Detection limit of 0.24 fg rBC (upper limit of ~7.5 fg) Also measures scattered light at 1064 nm which can be used to determine rBC coating state Droplet Measurement Technologies (dropletmeasurement.com)

4. Black carbon mass and number concentrations 2009-2013

5. Our current focus  Biomass burning periods  Free troposphere sampling  Free troposphere sampling when air masses had an Asian origin

6. Periods of biomass burning Local firesSiberian fires

7. Determining periods influenced by BB 1. Forest emissions are separated from anthropogenic sources using OM /(OM+SO4) (>0.7 indicates forest emissions) 2. Periods of biomass burning are further separated by the increased concentration of levoglucosan fragments at m/z 57, 60, and 73.

8. Siberian smoke event in July 2012 From July 6-8, 2012 elevated rBC concentrations were measured. There is some evidence that at least for the morning of July 8 we were sampling a plume from Siberia. Navy Aerosol Analysis and Prediction System (NAAPS)

9. Microphysical properties of local vs Siberian smoke Local smoke (July 6-7, 2012) Siberian smoke (July 8, 2012)

10. Determining FT and FT with Asian-origin using HYSPLIT Free Troposphere 1. January to April 2. 2000 to 0800 PST 3. 900hPa Free Troposphere and Asian-origin All of the above plus: 1. ≥ 12 hours in Asian box (red) 2. did not arrive from east of 121°W

11. Mass concentration histograms DatasetMinMaxMeanMedian Full Record 0.0011476.26.61.2 BB 0.05329.355.641.2 FT 0.00274.81.90.7 FT Asian-origin 0.0034.60.60.4

12. Comparison of measurements with GEOS-Chem data - Monthly average mass concentrations in ng/m 3 - The 2012-2013 measurements are compared with 2010- 2011 GEOS-Chem data - Thanks to Andy Morrow for the GEOS-Chem data

13. Thank You!

14. HYSPLIT back-trajectories All FT for January 2013 Asian-origin FT for January 2013