download_narr: Download meteorological data
In amadeus: Accessing and Analyzing Large-Scale Environmental Data

download_narr

R Documentation

Download meteorological data

Description

The download_narr function accesses and downloads daily meteorological data from NOAA's North American Regional Reanalysis (NARR) model.

Usage

download_narr(
  variables = NULL,
  year = c(2018, 2022),
  directory_to_save = NULL,
  acknowledgement = FALSE,
  download = FALSE,
  remove_command = FALSE,
  hash = FALSE
)

Arguments

`variables`	character. Variable(s) name acronym. See List of Variables in NARR Files for variable names and acronym codes.
`year`	character(1 or 2). length of 4. Year or start/end years for downloading data.
`directory_to_save`	character(1). Directory(s) to save downloaded data files.
`acknowledgement`	logical(1). By setting `TRUE` the user acknowledges that the data downloaded using this function may be very large and use lots of machine storage and memory.
`download`	logical(1). `FALSE` will generate a *.txt file containing all download commands. By setting `TRUE` the function will download all of the requested data files.
`remove_command`	logical(1). Remove (`TRUE`) or keep (`FALSE`) the text file containing download commands.
`hash`	logical(1). By setting `TRUE` the function will return an `rlang::hash_file()` hash character corresponding to the downloaded files. Default is `FALSE`.

Value

For hash = FALSE, NULL
For hash = TRUE, an rlang::hash_file character.
netCDF (.nc) files will be stored in directory_to_save.

Note

"Pressure levels" variables contain variable values at 29 atmospheric levels, ranging from 1000 hPa to 100 hPa. All pressure levels data will be downloaded for each variable.

Author(s)

Mitchell Manware, Insang Song

References

\insertRef

mesinger_north_2006amadeus

Examples

## Not run: 
download_narr(
  variables = c("weasd", "omega"),
  year = 2023,
  directory_to_save = tempdir(),
  acknowledgement = TRUE,
  download = FALSE, # NOTE: download skipped for examples,
  remove_command = TRUE
)

## End(Not run)

amadeus documentation built on April 4, 2025, 12:21 a.m.