Title

Surface ozone in Joshua Tree National Park

Status

Faculty

School

School of Science

Department

Chemistry

Document Type

Article

Publication Date

4-2014

Publication Title

Atmospheric Environment

Description/Abstract

Surface ozone concentrations are high throughout Joshua Tree National Park (JOTR), as demonstrated by direct monitoring at multiple sites within JOTR. Multiple years of data from continuous ozone monitors and passive samplers indicate that the highest ozone concentrations occur in the northwest corner of JOTR, and decrease as one moves to the south and east. Analysis of long-term (1994–2010) hourly data from the Black Rock monitoring station indicates that average summertime ozone concentrations have remained essentially constant, with a concurrent decrease in the number, and magnitude, of high ozone events. Calculation of ozone exposure indices suggests that ozone concentrations may be high enough to adversely affect local flora, especially in the northwestern region of the park. Back-trajectory analysis using the HYSPLIT model suggests that most of the ozone measured in JOTR is transported into the park from a high source area (Los Angeles and surrounding suburbs) to the west.

Keywords

Portable ozone monitor, Passive samplers, Spatial interpolation, HYSPLIT model, Ozone exposure indices

SMC Affiliated Work

1

Volume

87

First Page

95

Last Page

107

Scholarly

yes

DOI

10.1016/j.atmosenv.2013.12.043

Disciplines

Chemistry | Environmental Sciences

Original Citation

Joel Burley (Chemistry) "Surface ozone in Joshua Tree National Park," with Bytnerowicz, A., Ray, J. D., Schilling, S., and Allen, E. B. in Atmospheric Environment 87, pp. 95-107 (2014). doi:10.1016/j.atmosenv.2013.12.043.

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