NARSTO PAC2001 Langley Site Gaseous, Particle, and Meteorological DataEntry ID: NARSTO_PAC2001_LANGLEY
Abstract: The NARSTO_PAC2001_LANGLEY_GAS_PM_MET_DATA were obtained between August 8 and September 2, 2001 during the Pacific 2001 Air Quality Study (PAC2001).
The Langley Ecole Lochiel (LEL) site was at 49.0289 N and -122.6025 W and at 90m a.s.l. The site was surrounded by hobby farms and by relatively few country roads that are lined with both coniferous and deciduous trees, with little change in terrain ... heights within a radius of 15 km. Nontraditional agricultural practices, such as mushroom and chicken farming and small orchards, are common within this radius of the site. The nearest small urban center, Langley, is about 6 km north of the site. The site was approximately 10 km to the major expressways of Highway 1 in Canada and I-5 in the US, and was approximately 6km to Highway 1A in Canada. Particle sampling was done in the center of an unobstructed field of approximately 30-50m2 about 2.5m from ground. On-site measurements were conducted from five temporary labs with inlets about 5m above ground.
Measurements at this site, from August 13th to 31st, were intended to address the unknowns related to particles and ozone, with an emphasis on the transition from the urban mix to a suburban/rural setting, particularly the impact of agricultural sources on the particulate matter formation and evolution.
Similar to the instrumentation package at Slocan Park site, the instrumentation package includes measurements in five categories.
1) Measurements related to the precursors of fine PM and the oxidation environment in which the fine PM is formed.
2) Measurements related to the characterization of fine PM and the evolution process of PM.
3) Measurements related to the emission of fine PM and its precursors in the valley.
4) Measurements related to the mapping of fine PM horizontal and vertical
distribution in the valley.
5) Measurements of meteorological parameters in the valley.
Measurements included detailed gas phase measurements of NOx=NOy (total and speciated), CO, O3, SO2, VOCs, OVOCs, carbonyls, NH3, HOx, and NH3 intended for a detailed understanding of the oxidation environment and chemical processes in which both O3 and secondary particulate matter are formed. Detailed measurements were made on size distributed inorganic ionic components, organic carbon, elemental carbon, and mass from 0.05 to 18 mm AD twice a day. High-time resolution measurements using a second AMS were made, measuring the size distribution of inorganic species and homologues of organic species from 0.06 to 0.7 mm. Detailed organic carbon speciation measurements, carbon isotope characterization, sulfur isotope characterization, and amorphous carbon were made for particles 2.5 mm on 10-h day samples collected twice daily. The gas-particle partitioning of semi-volatile organic compounds was studied using a Hi-cap denuder sampling system and detailed lab organic analyses. Continuous mass measurements for particles 2.5 mm were made using a TEOM with a diffusion dryer on the inlet. Particle number size distributions were measured from 0.01 to 3 mm using a DMA and an optical probe. Hygroscopic properties of particles were measured at two particle sizes using two DMAs in tandem. For NH3, HNO2, HNO3, HCHO, and PM 2.5 mm mass measurements and the particle chemical size distributions, more than one technique were deployed at this site. The multiple measurements of these species provided a test of the performance and validation of the different techniques and ensure that instrument biases were corrected. They also provide complementing data of different characteristics, such as better sensitivities versus time resolution. The diurnal evolution of the boundary layer height was studied using a scanning LIDAR that scanned the north, east and west quadrants. Radiation measurements, both UV and visible, were done using an Eppley and a CIMEL sun photometer.
Vertical distribution of certain parameters, such as O3 and meteorological parameters, in the lower part of the atmosphere were also assessed from tethered balloons at Langley Poppy High School, 7.9km northeast of the Langley Ecole Lochiel site. Number size distribution between 0.25 and 10 mm were done from ground the Langley Ecole Lochiel site. This was further aided by a scanning lidar that based at the Langley Ecole Lochiel site.
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] described specific study objectives (Li, 2004) and presented 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. Aloft measurements were taken from a Convair 580 and a Cessna 188. Selected measurement data were compiled for each site and aircraft and are archived as site-specific data sets.
NARSTO (formerly North American Research Strategy for Tropospheric Ozone) is a public/private partnership, whose membership spans government, the utilities, industry, and academe throughout Mexico, the United States, and Canada. The primary mission is to coordinate and enhance policy-relevant scientific research and assessment of tropospheric pollution behavior; activities provide input for science-based decision-making and determination of workable, efficient, and effective strategies for local and regional air-pollution management. Data products from local, regional, and international monitoring and research programs are available.
Start Date: 2001-08-08Stop Date: 2001-09-02
ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES
ATMOSPHERE > AEROSOLS > CARBONACEOUS AEROSOLS
ATMOSPHERE > AEROSOLS > NITRATE PARTICLES
ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON MONOXIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > NON-METHANE HYDROCARBONS/VOLATILE ORGANIC COMPOUNDS
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITROGEN OXIDES
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS > OZONE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > SULFUR COMPOUNDS > SULFUR DIOXIDE
ISO Topic Category
Data Set Progress
Email: shao-meng.li at ec.gc.ca
Role: TECHNICAL CONTACT
Email: shao-meng.li at ec.gc.ca
Role: DIF AUTHOR
Email: support-asdc at earthdata.nasa.gov
NASA Langley Atmospheric Science Data Center User and Data Services NASA Langley Research Center Mail Stop 157D
Province or State: VA
Postal Code: 23681-2199
Alfarra, et al., 2003. Characterization of organic aerosols in the Lower Fraser
Valley during the Pacific 2001 using two Aerodyne aerosol mass spectrometers.
Atmospheric Environment, this issue, doi:10.1016/j.atmosenv.01.054
Anlauf, K.G., Li, S.-M., Leaitch, W.R., Brook, J., Hayden, K., Wiebe, A., 2002.
Chemical and size characteristics of particles in the Lower Fraser Valley:
Pacific 2001 Field ... Study, Presentation at the American Geophysical Union Fall
Meeting, December 2002, San Francisco, CA, USA.
Brook, et al., 2003. OC and EC measurement during Pacific 2001. Presentation at
the European Aerosol Conference, 2003.
Boudries, H., et al., 2004. Chemical and physical processes controlling the
distribution of aerosols in the Lower Fraser Valley, Canada, during the PACIFIC
2001 field campaign. Atmospheric Environment, this issue,
Hayden, et al., 2004. Gaseous chemical characterization of the Lower Fraser
Valley airshed during Pacific 2001. Atmospheric Environment, this issue,
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
McCarry, B.E., Rosati, M., Yang, R., 2002. PAH and nitro-PAH analyses of air
particulate material collected during Pacific 2001 study. Presentation at the
Symposium on Atmospheric Aerosols and Pacific 2001 Field Study, 85th CSC
Conference, Vancouver, Canada, June 1-5, 2002.
Norman, A.L., Belzer, W., Barrie, L., Wang, D., 2002. Sulphate in PM2.5:
results from the Pacific 2001 field campaign. Presentation at the American
Geophysical Union Fall Meeting, December 2002, San Francisco, CA, USA.
Pryor, et al., 2004. Spatial and temporal variability of reduced nitrogen
concentrations in the Fraser Valley. Atmospheric Environment, this issue,
Wang, D., Fuentes, J.D., Dann, T., Travers, D., Connolly, T., Arktas, Y., 2002.
Non-methane hydrocarbon measurements in the Vancouver region during Pacific
2001. Presentation at the American Geophysical Union Fall Meeting, December
2002, San Francisco, CA, USA.
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date: 2005-11-29
Last DIF Revision Date: 2014-04-07