The NARSTO_PAC2001_CONVAIR_PM_OZONE_MET_DATA were obtained between August 14 and August 30, 2001 during the Pacific 2001 Air Quality Study (PAC2001).
The main mission for the National Research Council (NRC) - Institute for Aerospace Research (IAR) Convair 580 was to map the particle spatial distribution in the valley through remote sensing, and to provide critical meteorological data, particle ... number size distribution and O3 profiles. The flights followed mostly meridional and two approximately east-west tracks at 4800 m over the valley for remote sensing using two LIDARs (Strapp and Chevrier, 2001). Spirals from 150-6000 m, for vertical profiles of O3, particle number size distribution, and meteorological parameters, were conducted at the model western boundary at 49° 20'N and 123° 45' W, at the model southern boundary of 48° 25' N and 123° W, as well as during takeoff and landing. A typical flight covered the valley in eight meridional legs, approximately equally spaced, with three of them directly over the ground sites Slocan Park (SP), Langley Ecole Lochiel (LEL), and Sumas Eagle Ridge (SER). East-west flight tracks were flown north and south of the Fraser River, covering most of the urban centers of the valley to probe the urban-suburban-rural gradient, with additional E-W tracks over the north shore lakes to help understand the valley flow situation.
The remote sensing was based on aerosol backscattering using upward- and downward-looking LIDARs at the 1064 nm wavelength with a depolarization channel (Strawbridge and Snyder, 2004a). The profiles were obtained during aircraft spirals, specifically located at the western and southern boundaries of the domains of air quality models UAM/V and Model 3/CMAQ, and were intended as the input as boundary conditions for further modeling. The Convair mission flights covered an area with boundaries roughly corresponding to the model domain of Model 3/CMAQ application to the region, with the eastern boundary at 121° 52' 30" W and the western boundary at 123° 50' 13" W, and extended from 48° 30' N to 49° 30' N over the mountain tops.
On August 26 and August 29, night missions were flown from approximately 9 p.m. to 2 a.m. the next morning, primarily to map the nighttime movement of the urban plume in the main and secondary valleys (Strawbridge and Snyder, 2004b). The ground site overflights provided an assessment of the vertical thermal structure and the extent of particle spatial distribution over the sites.
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.
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Strapp, J., and W.T. Chevrier, Pacific 2001 flight plan report, 26p, June 2001.
Strawbridge and Snyder, 2004a Strawbridge, K., Snyder, B., 2004a. Planetary boundary layer height determination during Pacific 2001 using the advantage of a scanning lidar instrument. Atmospheric Environment, this issue, doi:10.1016/j.atmosenv.2003.10.065.
Strawbridge and ... Snyder, 2004b Strawbridge, K., Snyder, B., 2004b. Daytime and nighttime aircraft lidar measurements showing evidence of particulate matter transport into the northern valleys of the Lower Fraser Valley, BC. Atmospheric Environment, this issue, doi:10.1016/j.atmosenv.2003.10.036.
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)