Chemistry of Particles and Selected Trace Gases at Whistler, BC
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Chemistry of Particles and Selected Trace Gases at Whistler, BC A.M. Macdonald, K.G. Anlauf and W.R. Leaitch. Chemistry of Particles and Selected Trace Gases at Whistler, BC. Objectives Establish a baseline of particle and trace gas measurements at a lower free-tropospheric site.

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Chemistry of Particles and Selected Trace Gases at Whistler, BCA.M. Macdonald, K.G. Anlauf and W.R. Leaitch


Chemistry of Particles and Selected Trace Gases at Whistler, BC

  • Objectives

  • Establish a baseline of particle and trace gas measurements at a lower free-tropospheric site.

  • Examine incidences of trans-Pacific pollution transport from Asia into western Canada.

  • 2004/2005 Objectives/Deliverables

  • Measure sulphate and other inorganic particle chemistry in the free troposphere for a three-year period (Completion of 2003 data set - May 04)

  • Document frequency and duration of incidences of trans-Pacific transported pollution to the West Coast of Canada (Selection of case studies from summer 2003 - Oct 04)

  • Provide background ozone climatology at a free-tropospheric site for a three-year period, including springtime maxima associated with photochemistry or troposphere-stratosphere folding events. (Completion of 2003 data set for O3 and CO May 04)

  • Evaluation of site as a long-term sampling location (Mar 05)



Lift operator’s hut – Sep 2004 operates year-round.

Environment Canada samplers


Mar 2002 operates year-round.

April 2002

May 2002

June 2002

July 2002

Aug 2002

Sep 2002

Oct 2002

Nov 2002

Dec 2002

Jan 2003

Feb 2003

Mar 2003

April 2003

May 2003

June 2003

July 2003

Aug 2003

Sep 2003

Oct 2003

Nov 2003

Dec 2003

Jan 2004

Feb 2004

Mar 2004

April 2004

May 2004

June 2004

July 2004

Aug 2004

Sep 2004

Instrumentation at Whistler Site March 2002 to October 2004

Ozone

CO

Filter Packs

Particle Distributions

PCASP1, DMA2

Dust Monitor

Site Visits

POPs (PBDEs, PCBs)

1

2

2

2

T, RH, P

Ozone and CO calibrations

Measurement Periods


  • Updated logger to 23X operates year-round.

  • Updated communications software

  • Files regularly posted to internal web site


Results: Gas phase measurements operates year-round.Data set: Ozone and CO, March 2002 to present Status: QA/QC complete up to March 2004

2003 summer average CO 20% higher than 2002 average



2003: 22.5 Mha operates year-round.

2002: 11.7 Mha

2004: 5.6 Mha

From: Jaffe et al., GRL 2004


Results: Particle measurements operates year-round.

  • Chemistry from Filter packs

    Status: Flow corrected- Feb 2004

    Samples analyzed –June 7, 2004

  • Physical characterization from

    (1) Grimm OPC (300 nm – 30 um) (> 80% data coverage in 2003/2004)

    (2) DMA (10 nm to 400 nm)

    • Dec 2003 to May 2004 (> 40% data coverage in 2003/2004)


Particle sulphate at Whistler Peak, < 2.5 um (24 or 48 hour filter packs)

April 2002 to February 2004


Soluble inorganics on teflon filters – April 2002 to June 2003

Median sulphate is 0.09 g m-3 with 95 % of the samples less than 0.56 g m-3. The major cation is NH4+ with 95% of the samples less than 0.25 g m-3. Very little mass is found in Ca2+ and Mg2+ with this 2.5  m cut off.






Lonesome Lake Fire, July 28, 2004 burning

MODIS Image

Source: Earth Observatory

Other tools available:

Trajectories, TOMS Aerosol Index


  • Deliverables 2003/2004: burning

  • 2004/2005 Objectives/Deliverables

  • Measure sulphate and other inorganic particle chemistry in the free troposphere for a three-year period (Completion of 2003 data set - May 04)

  • Document frequency and duration of incidences of trans-Pacific transported pollution to the West Coast of Canada (Selection of case studies from summer 2003 - Oct 04) March 05

  • Provide background ozone climatology at a free-tropospheric site for a three-year period, including springtime maxima associated with photochemistry or troposphere-stratosphere folding events. (Completion of 2003 data set for O3 and CO May 04)

  • Evaluation of site as a long-term sampling location (Mar 05)

  • Next Steps:

    • Installation of temperature sensors at various altitudes.

    • Continue sampling, increase particle physical measurements

    • Continue data QA/QC

    • Installation of NOx instrument

    • Look for transport scenarios

    • Collaboration for modeling, vertical profile data

    • AMS on site for spring 2005 period


Acknowledgements burning

Data analysis - Art Tham

Web site – Gary Chung, Kathy Hayden

Site visits – Dave Halpin, Maurice Watt, Kathy Hayden,

John Deary

Sample analyses – CAPMoN

Site operators - Juniper Buller, Anton Horvath


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