Real-time ozone mapping using a regression-interpolation hybrid approach, applied to Tucson, Arizona

Joseph S. Abraham, Andrew Comrie

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Real-time ozone (O3) maps, intended for public access and mass media, are generated from spatially interpolating (i.e., kriging) sparse monitoring data and are typically characterized by over-smoothed surfaces that inadequately represent local-scale spatial patterns (e.g., averaged over 1 km2). In this paper, a hybrid regression-interpolation methodology is developed to enhance the representation of local-scale spatiotemporal patterns with an application to Tucson, Arizona. The mapping of local patterns is enhanced with pre-interpolation regression modeling of local-scale deviation-from-mean variability, preserving variation in the monitor data that is ubiquitous across the modeling domain (i.e., the areal mean). The model is trained on several years of deviation-from-mean hourly O3 data, and predictor variables are developed using theoretically and empirically derived proxy regression variables. The regression model explains a significant proportion of the variation in the data (r2 = 0.54), with an average error of 7.1 ppb. When augmented with the areal mean, the r2 of the pre-interpolation model increases to 0.847. Model residuals are then spatially interpolated to the extents of the modeling domain. Final concentration estimate maps are the summation of areal mean, regression, and spatially interpolated surfaces, preserving absolute values at monitor locations.

Original languageEnglish (US)
Pages (from-to)914-925
Number of pages12
JournalJournal of the Air and Waste Management Association
Volume54
Issue number8
StatePublished - 2004

Fingerprint

Ozone
interpolation
Interpolation
ozone
modeling
public access
mass media
kriging
methodology
Monitoring

ASJC Scopus subject areas

  • Atmospheric Science
  • Waste Management and Disposal
  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Real-time ozone mapping using a regression-interpolation hybrid approach, applied to Tucson, Arizona. / Abraham, Joseph S.; Comrie, Andrew.

In: Journal of the Air and Waste Management Association, Vol. 54, No. 8, 2004, p. 914-925.

Research output: Contribution to journalArticle

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