wind.dl: Wind-data download

In rWind: Download, Edit and Include Wind and Sea Currents Data in Ecological and Evolutionary Analysis

Description

wind.dl downloads wind data from the Global Forecast System (GFS) of the USA's National Weather Service (NWS) (https://www.ncei.noaa.gov/products/weather-climate-models/global-forecast). Wind data are taken from NOAA/NCEP Global Forecast System (GFS) Atmospheric Model collection. Geospatial resolution is 0.5 degrees (approximately 50 km), and wind is calculated for Earth surface, at 10 m. More metadata information: https://pae-paha.pacioos.hawaii.edu/erddap/griddap/ncep_global.graph

Usage

wind.dl(
  yyyy,
  mm,
  dd,
  tt,
  lon1,
  lon2,
  lat1,
  lat2,
  type = "read-data",
  trace = 1
)

read.rWind(file)

Arguments

yyyy	Selected year.
mm	Selected month.
dd	Selected day.
tt	Selected time. There are currently several options at the GFS database: 00:00 - 03:00 - 06:00 - 09:00 - 12:00 - 15:00 - 18:00 - 21:00 (UTC).
lon1	Western longitude
lon2	Eastern longitude
lat1	Southern latitude
lat2	Northern latitude
type	Output type. "read-data" is selected by default, creating an R object. If you choose "csv", wind.dl create a a CSV file in your working directory named "wind_yyyy_mm_dd_tt.csv".
trace	if trace = 1 (by default) track downloaded files
file	file name of the saved ".csv" files.

Details

The output type is determined by type="csv" or type="read-data". If type="csv" is selected, the function creates a "wind_yyyy_mm_dd_tt.csv" file that is downloaded at the work directory. If type="read-data" is selected, an R object (data.frame) is created.

Value

"rWind" and "data.frame" class object or .csv file with U and V vector components and wind direction and speed for each coordinate in the study area defined by lon1/lon2 and lat1/lat2.

Note

Longitude coordinate are provided by GFS dataset in 0/360 notation and transformed internally into -180/180. Wind "dir" denotes where the wind is going (toward), not from where is coming.

Author(s)

Javier Fernández-López ([e-mail])

References

http://www.digital-geography.com/cloud-gis-getting-weather-data/#.WDOWmbV1DCL

https://pae-paha.pacioos.hawaii.edu/erddap/griddap/ncep_global.graph

See Also

wind.dl_2, wind2raster

Examples

# Download wind for Iberian Peninsula region at 2015, February 12, 00:00
## Not run: 

wind.dl(2015, 2, 12, 0, -10, 5, 35, 45)

## End(Not run)

rWind documentation built on Oct. 19, 2021, 5:06 p.m.