Ogimet - download and visualize wind patterns over Svalbard
- Downloading hourly data from the Ogimet repository for the defined
time frame (2018/01/01-2018/12/31); chosen station: Svalbard
Lufthavn
- Using external package ‘openair’ to visualize the downloaded
results
## station: 01008
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##
## Attaching package: 'dplyr'
## The following objects are masked from 'package:stats':
##
## filter, lag
## The following objects are masked from 'package:base':
##
## intersect, setdiff, setequal, union
library(openair) # external package for plotting wind roses
# converting wind direction from character into degress required by most
wdir <- data.frame(ddd = c("CAL","N","NNE","NE","ENE","E","ESE","SE","SSE",
"S","SSW","SW","WSW","W","WNW","NW","NNW"),
dir = c(NA, 0:15 * 22.5), stringsAsFactors = FALSE)
# changing date column to the format required by openair package:
df$Date <- as.POSIXct(df$Date, tz = "UTC")
df$date <- df$Date
df <- left_join(df, wdir)
## Joining with `by = join_by(ddd)`
df$ws <- df$ffkmh / 3.6 # conversion to m/s from km/h
df$gust <- df$Gustkmh / 3.6 # conversion to m/s from km/h
windRose(mydata = df, ws = "ws", wd = "dir", type = "season", paddle = FALSE,
main = "Svalbard Lufthavn (2018)", ws.int = 3, dig.lab = 3, layout = c(4, 1))

# do we miss any data?
summaryPlot(df[ ,c("date", "TC", "ws", "gust")])

# which sectors are responsible for warm/cold air mass advection:
polarPlot(df, pollutant = "TC", x = "ws", wd = "dir", k = 50, force.positive = FALSE,
type = "season", layout = c(4, 1), resolution = "fine", normalise = FALSE)
