Vertical profiles of aerosols, O3 and CO at Whistler, BC during Intex-B
Abstract
Measurements of ozone, carbon monoxide and the composition and size distribution of aerosol particles were made from a Cessna 207 aircraft from April 22 to May 17, 2006 at Whistler, BC. The flights consisted of vertical profiles from about 1 km (MSL) to 5.5 km, conducted near the continuous measurement site at the peak of Whistler Mountain (elevation 2.1 km) that also measures ozone, carbon monoxide and aerosol particle composition and size distribution. Ozone and carbon monoxide were measured from the aircraft with a TECO 49 ozone monitor and an Aerolaser AL5002 respectively. Aerosol particle composition and size distribution were measured with an Aerodyne Quadrapole Aerosol Mass Spectrometer (Q-AMS), and particle size distribution was also measured with a PMS-PCASP100X and a PMS FSSP300. The AMS was mounted inside the aircraft and sampled the aerosol from a short stainless steel tube directed into the airstream. The PCASP100X and FSSP300 were mounted under the wings of the aircraft. Preliminary comparisons of data collected from the aircraft at 2.1 km with those from the Whistler peak site indicate good agreement. The profiles typically showed a boundary layer dominated by organic material in the particles, possibly the product of biogenic trace gas oxidation. Above the boundary layer, plumes were often dominated by sulfate. During one period, a plume consisting of mostly organic particles was observed with relatively low ozone and carbon monoxide. The overall results are summarized, and a couple of the plume cases are examined for potential sources.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2006
- Bibcode:
- 2006AGUFM.A44B..02L
- Keywords:
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- 0305 Aerosols and particles (0345;
- 4801;
- 4906);
- 0365 Troposphere: composition and chemistry;
- 0368 Troposphere: constituent transport and chemistry