using PyCall
cdsapi = pyimport("cdsapi")
c = cdsapi.Client()

year = "2019"
savename = "ERA5/T_W_F_$year.nc"
mkpath(dirname(savename))

c.retrieve(
    "reanalysis-era5-pressure-levels-monthly-means",
    Dict(
        "product_type" => "monthly_averaged_reanalysis",
        "variable" => [
            "fraction_of_cloud_cover", "temperature", "vertical_velocity",
        ],
        "pressure_level" => [
            "2", "5", "10",
            "30", "70", "125",
            "175", "225", "300",
            "400", "500", "600",
            "700", "775", "825",
            "875", "925", "975",
        ],
        "year" => year,
        "month" => [
            "01", "02", "03",
            "04", "05", "06",
            "07", "08", "09",
            "10", "11", "12",
        ],
        "time" => "00:00",
        "format" => "netcdf",
    ),
    savename # file to save the data.
)