Assessing public perception of visibility for standard setting exercises
Pryor, SC
| HERO ID | 56598 |
|---|---|
| In Press | No |
| Year | 1996 |
| Title | Assessing public perception of visibility for standard setting exercises |
| Authors | Pryor, SC |
| Journal | Atmospheric Environment |
| Volume | 30 |
| Issue | 15 |
| Page Numbers | 2705-2716 |
| Abstract | #Using the photographs and optical measurements taken during a summer field program (REVEAL) designed to examine the chemical and physical characteristics of visibility impairment in the Fraser Valley, southwestern British Columbia, a protocol for gauging public perception of visibility in this region was devised and tested in a pilot survey. This paper details the protocol (which is based on previous studies conducted in the United States of America) and analysis techniques for survey responses. A preliminary assessment of the results of the pilot study is also presented. A public perception survey conducted in Denver (Ely et al., 1991), resolved a visibility standard for Denver of bext (total light extinction) = 0.076 Î 10-3 m-1. Assuming a homogeneous atmosphere, this level of bext is approximately equal to a visual range of 50 km. Using a similar protocol, responses from this pilot study were used to extrapolate visibility standards for two suburban locations in the Fraser Valley of b(ext) (approx) 0.09 Î 10-3-0.105 Î 10-3 m-1 (bsp (particle light scattering) (approx) 0.051 Î 10-3-0.063 Î 10-3 m-1) and b(sp) (approx) 0.39 Î 10-3 m-1. These levels of light extinction (bsp is the largest component of b(ext)) relate to approximate visual range of between 40 and 60 km in a homogeneous atmosphere. Possible reasons for the apparent discrepancies between locations are discussed and the effect of survey group are addressed. |
| Doi | 10.1016/1352-2310(95)00365-7 |
| Wosid | WOS:A1996UN84700004 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | ECRIB.Atmos. Environ. 30: 2705-2716. |
| Is Public | Yes |
| Keyword | visibility standards; visual air quality; perception; southwestern British Columbia |
| Is Qa | No |