The traj_data dataset is provided as an example dataset as part of the
openairmaps package. The dataset contains HYSPLIT back trajectory data for
air mass parcels arriving in London in 2009. It has been joined with air
quality pollutant concentrations from the "London N. Kensington" AURN urban
background monitoring site.
Format
A data frame with 53940 rows and 10 variables:
- date
The arrival time of the air-mass
- receptor
The receptor number
- year
Trajectory year
- month
Trajectory month
- day
Trajectory day
- hour
Trajectory hour
- hour.inc
Trajectory hour offset from the arrival date
- lat
Latitude
- lon
Longitude
- height
Height of trajectory in m
- pressure
Pressure of the trajectory in Pa
- date2
Date of the trajectory
- nox
Concentration of oxides of nitrogen (NO + NO2)
- no2
Concentration of nitrogen dioxide (NO2)
- o3
Concentration of ozone (O3)
- pm10
Concentration of particulates (PM10)
- pm2.5
Concentration of fine particulates (PM2.5)
Source
traj_data was compiled from data using the openair::importTraj()
function from the openair package with air quality data from
openair::importAURN() function.
Details
traj_data is supplied with the openairmaps package as an example dataset
for use with documented examples.
Examples
# basic structure
head(traj_data)
#> # A tibble: 6 × 17
#> date receptor year month day hour hour.inc lat lon
#> <dttm> <int> <dbl> <int> <int> <int> <dbl> <dbl> <dbl>
#> 1 2010-04-15 00:00:00 1 2010 4 15 0 0 51.5 -0.1
#> 2 2010-04-15 00:00:00 1 2010 4 14 23 -1 51.7 0.139
#> 3 2010-04-15 00:00:00 1 2010 4 14 22 -2 51.9 0.378
#> 4 2010-04-15 00:00:00 1 2010 4 14 21 -3 52.1 0.618
#> 5 2010-04-15 00:00:00 1 2010 4 14 20 -4 52.2 0.859
#> 6 2010-04-15 00:00:00 1 2010 4 14 19 -5 52.4 1.10
#> # ℹ 8 more variables: height <dbl>, pressure <dbl>, date2 <dttm>, nox <dbl>,
#> # no2 <dbl>, o3 <dbl>, pm2.5 <dbl>, pm10 <dbl>