Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (473.0 KB bytes)

Title: A statistical approach to estimate O3 uptake of ponderosa pine in a mediterranean climate

Author: Grulke, N.E.; Preisler, H.K.; Fan, C.C.; Retzlaff, W.A.;

Date: 2002

Source: Environmental Pollution. 119: 163-175.

Publication Series: Scientific Journal (JRNL)

Description: In highly polluted sites, stomatal behavior is sluggish with respect to light, vapor pressure deficit, and internal CO2 concentration (Ci) and poorly described by existing models. Statistical models were developed to estimate stomatal conductance (gs) of 40-year-old ponderosa pine at three sites differing in pollutant exposure for the purpose of calculating O3 uptake. Gs was estimated using julian day, hour of day, pre-dawn xylem potential and photosynthetic photon flux density (PPFD). The median difference between estimated and observed field gs did not exceed 10 mmol H2O m–2 s–1, and estimated gs within 95% confidence intervals. O3 uptake was calculated from hourly estimated gs, hourly O3 concentration, and a constant to correct for the difference in diffusivity between water vapor and O3. The simulation model TREGRO was also used to calculate the cumulative O3 uptake at all three sites. O3 uptake estimated by the statistical model was higher than that simulated by TREGRO because gas exchange rates were proportionally higher. O3 exposure and uptake were significantly correlated (r2>0.92), because O3 exposure and gs were highly correlated in both statistical and simulation models. © 2002 Elsevier Science Ltd. All rights reserved.

Keywords: Ozone uptake, ponderosa pine, Stomatal conductance, TREGRO.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Grulke, N.E.; Preisler, H.K.; Fan, C.C.; Retzlaff, W.A. 2002. A statistical approach to estimate O3 uptake of ponderosa pine in a mediterranean climate. Environmental Pollution. 119: 163-175.


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.