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library(ecmwfr)
wf_set_key("38603", "e2a27a8e-18ee-47f8-a169-ade2b4385efd", service='cds')
## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables
## User 38603 for cds service added successfully
library(ncdf4)
library(raster)
## Loading required package: sp
library(maps)
request <- list("dataset"        = "reanalysis-era5-pressure-levels",
                "product_type"   = "reanalysis",
                "variable"       = "temperature",
                "pressure_level" = "850",
                "year"           = "2000",
                "month"          = "04",
                "day"            = "04",
                "time"           = "00:00",
                "area"           = "60/-10/50/5",
                "format"         = "netcdf",
                "target"         = "era5-demo.nc")
 ncfile <- wf_request(user = "38603",request = request,
                        transfer = TRUE,
                       path = "~",
                      verbose = FALSE)
## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables
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## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables

## Warning in default_backend_auto(): Selecting 'env' backend. Secrets are stored
## in environment variables
r <- raster::raster(ncfile)
raster::plot(r, main = "ERA-5 Reanalysis Demo (2m Temperature 850 hPa)")
maps::map("world", add = TRUE)