Aerial photography to detect and evaluate air pollution damaged ponderosa pine

Journal Article · Fri May 01 00:00:00 EDT 1970 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1970.10469402· OSTI ID:6469792

Larsh, R N; Miller, P R; Wert, S L

Forests stands in the San Gabriel and San Bernardino Mountains of Southern California have been damaged severly by oxidants from Los Angeles smog. P.R. Miller was instrumental in isolating ozone as the principal toxic oxidant. On an estimated 25,000 acres of damaged forest land, ponderosa pine (Pinus ponderosa L.) is the most affected tree species according to Miller, et al., and J.R. Parmeter, Jr., et al. B.L. Richards, Sr., et al., reported that damage symptoms on pine are commonly exhibited by short, chlorotic needles, accelerated needle abscission, and high branch mortality. A feasibility study was conducted with aerial photography to attempt eventual development of a rapid survey technique for estimating the economic impact of oxidant damage on ponderosa pine in these mountains. Four aerial films and five photographic scales were employed. Anscochrome D-200 color film at scales of 1:7920 and 1:1584 was considered optimum for damage detection and evaluation, respectively.

• Research Organization: National Air Pollution Control Administration, Washington, DC
• OSTI ID: 6469792
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 20:5; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AERIAL SURVEYING
AIR POLLUTION
CALIFORNIA
CONIFERS
DETECTION
ECONOMIC IMPACT
FEDERAL REGION IX
FORESTS
INJURIES
MORTALITY
MOUNTAINS
NORTH AMERICA
PHOTOCHEMICAL OXIDANTS
PHOTOGRAPHY
PINES
PLANTS
POLLUTION
SAN BERNARDINO MOUNTAINS
SYMPTOMS
TOXICITY
TREES
USA