##' Real-world data on PM10 pollution in Rouen area, France
##'
##' These data are TEOM (Tapered Element Oscillating Microbalance) PM10
##' concentrations from 2004 to 2006 (1096 days) measured by Air Normand, and
##' the associated weather data provided by Meteo France, the French national
##' meteorological service, using six different monitoring sites.
##'
##' Six different monitoring stations of the Rouen (Haute Normandie, France)
##' area are considered. The urban station \code{jus}, the traffic station
##' \code{gui}, the second most polluted in the region, and \code{gcm} which is
##' located in an industrial area. In Le Havre, are considered the stations
##' \code{rep} (the most polluted in the region) and \code{hri} located at the
##' seaside. Lastly, the station \code{ail} near Dieppe, because it is rural and
##' coastal, and a priori hardly influenced by social and industrial activity.
##' Grouping by categories: \code{jus} and \code{hri} are background urban
##' monitoring sites, \code{gui} and \code{rep} are urban sites close to
##' traffic, \code{gcm} is industrial and \code{ail} is rural.
##'
##' @format Each object is a data frame.
##'
##' The description of the 18 variables is the following (note that for
##' \code{gcm} station, only the pollutant SO2 is available in addition to
##' PM10, and for \code{ail} station, there is no other pollutant in addition
##' to PM10):
##'
##' \describe{
##' \item{PM10}{Daily mean concentration of PM10, in \eqn{\mu g/m^3}}
##' \item{NO, NO2, SO2}{Daily mean concentration of NO, NO2 , SO2, in
##' \eqn{\mu g/m^3}}
##' \item{T.min, T.max, T.moy}{Daily minimum, maximum and mean temperature, in
##' degree Celsius}
##' \item{DV.maxvv, DV.dom}{Daily maximum speed and dominant wind direction,
##' in degree (for wind direction, 0 degree corresponds to north)}
##' \item{VV.max, VV.moy}{Daily maximum and mean wind speed, in m/s}
##' \item{PL.som}{Daily rainfall, in mm}
##' \item{HR.min, HR.max, HR.moy}{Daily minimum, maximum and mean relative
##' humidity, in \%}
##' \item{PA.moy}{Daily mean air pressure, in hPa}
##' \item{GTrouen, GTlehavre}{Daily temperature gradient, in degree Celsius}
##' }
##'
##' @source F.-X. Jollois, J.-M. Poggi, B. Portier, \emph{Three non-linear
##' statistical methods to analyze PM10 pollution in Rouen area}. CSBIGS 3(1):
##' 1-17, 2009
##'
##' @docType data
##' @name PM10
NULL
##' @rdname PM10
"ail"
##' @rdname PM10
"gcm"
##' @rdname PM10
"gui"
##' @rdname PM10
"hri"
##' @rdname PM10
"jus"
##' @rdname PM10
"rep"
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