ozone
Ozone Concentrations in the Northeast U.S.

### Description

The data sets ozone.median, ozone.quartile, ozone.city, and ozone.xy contain data on ozone concentrations in 41 U.S. cities.

### Arguments

ozone.median | median of daily maxima ozone concentration for June 1974 through August 1974. Concentrations are in parts per billion (ppb).
ozone.quartile | upper quartile of daily maxima ozone concentration, in parts per billion (ppb).
ozone.city | character name of ozone monitoring site.
ozone.xy | list containing components named x and y that give the negative longitude and latitude of the monitoring sites, respectively, as measured in the coordinate system used by the usa function.

Source
Cleveland, W.S., Kleiner, B., McRae, J.E., Warner, J.L., and Pasceri, P.E. (1975). The Analysis of Ground-Level Ozone Data from New Jersey, New York, Connecticut, and Massachusetts: Data Quality Assessment and Temporal and Geographical Properties. Bell Laboratories Memorandum.
The original data were collected by the New Jersey Department of Environmental Protection, the New York State Department of Environmental Protection, the Boyce Thompson Institute (Yonkers, for New York data), the Connecticut Department of Environmental Protection, and the Massachusetts Department of Public Health.
Package Sdatasets version 6.1.5-18
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