rnoaa (version 0.8.4)

ghcnd_stations: Get information on the GHCND weather stations

Description

This function returns an object with a dataframe with meta-information about all available GHCND weather stations.

Usage

ghcnd_stations(...)

Arguments

...

In the case of ghcnd additional curl options to pass through to HttpClient. In the case of ghcnd_read further options passed on to read.csv

Value

This function returns a tibble (dataframe) with a weather station on each row with the following columns:

• id: The weather station's ID number. The first two letters denote the country (using FIPS country codes).

• latitude: The station's latitude, in decimal degrees. Southern latitudes will be negative.

• longitude: The station's longitude, in decimal degrees. Western longitudes will be negative.

• elevation: The station's elevation, in meters.

• name: The station's name.

• gsn_flag: "GSN" if the monitor belongs to the GCOS Surface Network (GSN). Otherwise either blank or missing.

• wmo_id: If the station has a WMO number, this column gives that number. Otherwise either blank or missing.

• element: A weather variable recorded at some point during that station's history. See the link below in "References" for definitions of the abbreviations used for this variable.

• first_year: The first year of data available at that station for that weather element.

• last_year: The last year of data available at that station for that weather element.

If a weather station has data on more than one weather variable, it will be represented in multiple rows of this output dataframe.

References

For more documentation on the returned dataset, see http://www1.ncdc.noaa.gov/pub/data/ghcn/daily/readme.txt.

Examples

# NOT RUN {
# Get stations, ghcnd-stations and ghcnd-inventory merged
(stations <- ghcnd_stations())

library(dplyr)
# filter by state
stations %>% filter(state == "IL")
stations %>% filter(state == "OR")
# those without state values
stations %>% filter(state == "")
# filter by element
stations %>% filter(element == "PRCP")
# filter by id prefix
stations %>% filter(grepl("^AF", id))
stations %>% filter(grepl("^AFM", id))
# filter by station long name
stations %>% filter(name == "CALLATHARRA")
# }

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