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NARSTO PAC2001 Cassiar Tunnel Gaseous and Particle Mass and Composition Data |
The Cassiar Tunnel site is located at 49.28139 N and -123.0318 W, at 40 m above sea level (a.s.l.). The tunnel is used mostly by light duty traffic with peak traffic volumes at rush hours. The goal of measurements at this site was to reduce the uncertainty in mobile source inventory for gas and particle emissions from light duty traffic sources, emphasizing the emissions of the precursors to PM formation and primary PM emissions for comparison with tailpipe emissions data from traditional testing conducted in laboratory on mobile source emissions, particularly for mass emission rates and chemical profiles. Duration of the emission study was from August 3rd to 10th, 2001.
For several measurements, different sampling and analytical techniques were used as a check on the accuracy of the measurements. For most gas measurements, two sets of instruments were deployed, one at each end of the tunnel, whereas most of the PM measurements were conducted at the exit end of the tunnel. Gas measurements included the typical pollution gases (SF6 as the tracer, NOx, N2O, CO, CO2, methane, SO2, VOCs, carbonyls, organic acids, NH3, Graham and Gray, 2002). The PM chemical and physical properties were measured in great details. For physical properties, particle number size distributions from 10 nm to 3 µm were measured, and hygroscopic properties were measured at two sizes (Prenni et al., 2002). Chemical measurements characterized the mass, inorganic and carbonaceous compositions of the primary particles.
| Measurements | Technique | Time resolution | Frequency | |
|---|---|---|---|---|
| Gas phase measurements | NO2 | DNPH cartridges | 3-h | 3 day-1 |
| Organic acids | KOH-impregnated filters-IC | 3-h | 3 day-1 | |
| C1-C7 carbonyls | DNPH-cartridges | 3-h | 3 day-1 | |
| NMHCs, including aromatics | Canisters-GC/FID | 3-h | 3 day-1 | |
| CO, CO2, CH4, N2O, SF6 | Canisters-GC | 3-h | 3 day-1 | |
| Particle characterization measurements | PM1, PM20.5 mass | Low-vol FP-microbalance weight difference | 3-h | 3 day-1 |
| OC/EC (<1 µm), OC/EC (<2.5 µm) | Low-vol FP-thermal optical detection | 3-h | 3 day-1 | |
| Black carbon | PSAP - Absorption | 1-h | Continuous | |
| Trace organic species-organic ions, inorganic ions | Low-vol FP-IC | 3-h | 3 day-1 | |
| Trace metals | Low-vol FP-XRF | 3-h | 3 day-1 | |
| Number size distribution (0.06-0.3 µm)) | Differential mobility analyzer (DMA) | 10-min | Continuous | |
The Pacific 2001 Air Quality Study (PAC2001) was conducted from 1 August to 31 September, 2001 in the Lower Fraser Valley (LFV), British Columbia, Canada. The study consisted of individual research projects organized to address several issues on ambient particulate matter and ozone that are important to policy makers. A special issue of Atmospheric Environment [Vol. 38(34), Nov 2004] describes specific study objectives (Li, 2004) and presents a series of results papers from the field study. The ground sampling sites during the study were (1) Cassiar Tunnel, (2) Slocan Park, (3) Langley Ecole Lochiel, (4) Sumas Eagle Ridge, and (5) Golden Ears Provincial Park and aloft measurements were taken from a Convair 580 and a Cessna 188. Selected measurement data have been compiled for each site and aircraft and are archived as site-specific data sets.
The data set should be cited as follows:
Li, Shao-meng. 2004. NARSTO PAC2001 Cassiar Tunnel Gaseous and Particle Mass
and Composition Data. Available on-line
(http://eosweb.larc.nasa.gov/PRODOCS/narsto/table_narsto.html)
at the Atmospheric Science Data Center at NASA Langley Research Center,
Hampton, Virginia, U.S.A.
Data files are in the NARSTO Data Exchange Standard (DES) format that is described in detail on the NARSTO Quality Systems Science Center (QSSC) web site. The files follow a tabular layout and are stored as ASCII comma-separated values files (.csv). The DES does not rely on row position to identify specific information, but uses a tag to describe the information contained in the row. The DES is a self-documenting format with three main sections: the header contains information about the contents of the file and the data originator; the middle section contains metadata tables that describe/define sites, flags, and other codified fields; and the final section is the main data table that contains key sampling and analysis information and the data values. Descriptions of the standardized metadata fields are also available on the QSSC web site.
| Data File Names | Link to Time Series Plots of Reported Variables (PDF) |
|---|---|
| NARSTO_PAC2001_CSRT_LAG_ACIDS_FP-IC-CE_20010809D7_V1.csv | View CSRT_LAG_ACIDS_FP-IC-CE_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_CARBONYLS_DNPH-HPLC_20010809D7_V1.csv | View CSRT_LAG_CARBONYLS_DNPH-HPLC_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_GASES_CANISTER_20010809D7_V1.csv | View CSRT_LAG_GASES_CANISTER_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_HALOVOC_CANISTER_20010809D7_V1.csv | View CSRT_LAG_HALOVOC_CANISTER_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_IONS-PM25_FP-IC-CE_20010809D7_V1.csv | View CSRT_LAG_IONS-PM25_FP-IC-CE_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_METALS-PM10_FP-XRF_20010809D7_V1.csv | View CSRT_LAG_METALS-PM10_FP-XRF_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_METALS-PM1_FP-XRF_20010809D7_V1.csv | View CSRT_LAG_METALS-PM1_FP-XRF_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_METALS-PM25_FP-XRF_20010809D7_V1.csv | View CSRT_LAG_METALS-PM25_FP-XRF_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_NMHC1_CANISTER_20010809D7_V1.csv | View CSRT_LAG_NMHC1_CANISTER_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_NMHC1_CONT_CANISTER_20010809D7_V1.csv | View CSRT_LAG_NMHC1_CONT_CANISTER_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_NMHC2_CANISTER_20010809D7_V1.csv | View CSRT_LAG_NMHC2_CANISTER_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_NMHC2_CONT_CANISTER_20010809D7_V1.csv | View CSRT_LAG_NMHC2_CONT_CANISTER_20010809D7 |
| NARSTO_PAC2001_CSRT_LAG_OCEC_FP-TOT_20010809D7_V1.csv | View CSRT_LAG_OCEC_FP-TOT_20010809D7 |
| NARSTO_PAC2001_CSRT_S-L_PART-FATTY-ACIDS_20010810D05_V1.csv | View CSRT_S-L_PART-FATTY-ACIDS_20010810D05 |
| NARSTO_PAC2001_CSRT_S-L_PART-OHSSTEROLS_20010810D05_V1.csv | View CSRT_S-L_PART-OHSSTEROLS_20010810D05 |
| NARSTO_PAC2001_CSRT_WRL_HYGGRO_HTDMA_20010812D3_V1.csv | View CSRT_WRL_HYGGRO_HTDMA_20010812D3 |
| NARSTO_PAC2001_CSRT_J-R_PAH_HIVOL_20010810D5_V1.csv | View CSRT_J-R_PAH_HIVOL_20010810D5 |
| NARSTO_PAC2001_CSTN_J-R_AROM-ACIDS_HIVOL_20010810D5_V1.csv | View CSTN_J-R_AROM-ACIDS_HIVOL_20010810D5 |
| NARSTO_PAC2001_CSTS_J-R_AROM-ACIDS_HIVOL_20010810D5_V1.csv | View CSTS_J-R_AROM-ACIDS_HIVOL_20010810D5 |
| NARSTO_PAC2001_CSTN_R-M_PART-ORG_HIVOL_20010809D6_V1.csv | View CSTN_R-M_PART-ORG_HIVOL_20010809D6 |
| NARSTO_PAC2001_CSRT_S-S_BC_PSAP_20010808_D04_V1.csv | View CSRT_S-S_BC_PSAP_20010808_D04 |
Pacific 2001 data file names are comprised of nine sections, defined as follows:
Model file name: NARSTO_PAC2001_SLPK_JRB_MET_TOWER_200108D75_V1.csv
| Abbreviation | Site Name |
|---|---|
| BNDB | Boundary Bay |
| CSRT (CSTN, CSTS) | Cassiar Tunnel |
| GEPP | Golden Ears Provincial Park |
| LNEL | Langley Ecole Lochiel |
| LPHS | Langley Poppy High School |
| SLPK | Slocan Park |
| SLPS | Slope Study |
| SMMT | Sumas Mountain |
| CSNA | CFS Cessna 188 |
| CNVR | NRC-IAR Convair 580 |
| Initials | Name | Affiliation |
|---|---|---|
| AMM | Anne Marie Macdonald | Environment Canada |
| ANL | Anna Lise Norman | University of Calgary |
| C-M | Cris Mihele | Environment Canada |
| DKW | Danny Wang | Environment Canada |
| FAF | Frank Froude | Environment Canada |
| GVRD | Greater Vancouver Regional District | Greater Vancouver Regional District |
| HAB | H. A. Weibe | Environment Canada |
| J-R | Jochen Rudolph | York University |
| JRB | Jeff Brook | Environment Canada |
| JWB | Jan Bottenheim | Environment Canada |
| KGA | Kurt Anlauf | Environment Canada |
| LAG | Lisa Graham | Environment Canada |
| M-M | Mike Mozurkewich | York University |
| M-S | Mahiba Shoeib | Environment Canada |
| PCB | Peter Brickell | Environment Canada |
| R-M | Robert McLaren | York University |
| S-L | Shoa-meng Li | Environment Canada |
| S-P | Sara Pryor | University of Indiana |
| S-S | Sangeeta Sharma | Environment Canada |
| WOR | Douglas Worsnop | Aerodyne Research Inc. |
| WRL | Richard Leaitch | Environment Canada |
Graham, L., Gray, C., 2002. Pacific 2001: Cassiar Tunnel study - gaseous emissions measurements. Presentation at the Symposium on Atmospheric Aerosols and Pacific 2001 Field Study, 85th CSC Conference, Vancouver, Canada, June 1-5, 2002.
Prenni, A.J., Kreidenweis, S.M., DeMott, P.J., 2002. Hygroscopic growth measurements during PACIFIC 2001. Presentation at the Symposium on Atmospheric Aerosols and Pacific 2001 Field Study, 85th CSC Conference, Vancouver, Canada, June 1-5, 2002.
Li, Shao-Meng. 2004. A concerted effort to understand the ambient particulate matter in the Lower Fraser Valley: the Pacific 2001 Air Quality Study. Atmospheric Environment, Volume, 38(34), pp. 5719-5731. (Pacific 2001 Special Issue)
Name: Li, Shao-meng
E-mail: shao-meng.li@ec.gc.ca
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