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/// Define functions to download surface and pressure level variables for ICON
protocol IconVariableDownloadable: GenericVariable {
func skipHour(hour: Int, domain: IconDomains, forDownload: Bool, run: Timestamp) -> Bool
var multiplyAdd: (multiply: Float, add: Float)? { get }
func getVarAndLevel(domain: IconDomains) -> (variable: String, cat: String, level: Int?)?
}
extension IconSurfaceVariable: IconVariableDownloadable {
/// Vmax and precip always are empty in the first hour. Weather codes differ a lot in hour 0.
func skipHour(hour: Int, domain: IconDomains, forDownload: Bool, run: Timestamp) -> Bool {
if self == .direct_radiation && domain == .iconEps && hour % 3 != 0 {
// ICON-EPS only has 3-hourly data for direct radiation
return true
}
if domain == .iconEuEps &&
[.wind_u_component_80m, .wind_v_component_80m, .temperature_80m].contains(self) &&
[57, 63, 69].contains(hour) {
// Upper levels have fewer timestamps
return true
}
if domain == .iconEuEps &&
[Self.snowfall_convective_water_equivalent, .snowfall_water_equivalent].contains(self) &&
[6,18].contains(run.hour) &&
hour % 6 != 0 {
return true
}
// only 6h pressure in icon
if domain == .iconEps && self == .pressure_msl && hour % 6 != 0 {
return true
}
// only 6h cape in icon-eu for 6 and 18z run
if domain == .iconEuEps && self == .cape && [6,18].contains(run.hour) && (hour % 6 != 0 || hour == 0) {
return true
}
if hour != 0 {
return false
}
// download hour0 from ICON-D2, because it still contains 15 min data
if forDownload && domain == .iconD2 && self != .weather_code {
return false
}
switch self {
case .wind_gusts_10m: return true
case .sensible_heat_flux: return true
case .latent_heat_flux: return true
case .direct_radiation: return true
case .diffuse_radiation: return true
case .weather_code: return true
case .snowfall_water_equivalent: fallthrough
case .snowfall_convective_water_equivalent: fallthrough
case .precipitation: fallthrough
case .showers: fallthrough
case .rain: return true
case .updraft: return true
default: return false
}
}
func getVarAndLevel(domain: IconDomains) -> (variable: String, cat: String, level: Int?)? {
if domain == .iconEps || domain == .iconEuEps || domain == .iconD2Eps {
switch self {
case .diffuse_radiation:
if domain == .iconEps {
// ICON-EPS does not have diffuse radiation
// Put regular shortwave radiation into this field
return ("asob_s", "single-level", nil)
}
break
case .pressure_msl:
if domain == .iconEps || domain == .iconEuEps {
// use surface pressure instead of sea level pressure
return ("ps", "single-level", nil)
}
break
case .direct_radiation:
break // ICON-EPS has only 3-hourly data
case .cloud_cover:
break
case .temperature_2m:
break
case .relative_humidity_2m:
if domain == .iconEps {
// use dewpoint, because relative humidity is only 6 hourly
return ("td_2m", "single-level", nil)
}
if domain == .iconEuEps {
// No dewpoint or relative humidity available in EU-EPS
return nil
}
break
case .precipitation:
break
case .wind_u_component_10m:
break
case .wind_v_component_10m:
break
// all variables below are not in the global EPS model
case .wind_u_component_80m:
fallthrough
case .wind_v_component_80m:
fallthrough
case .temperature_80m:
fallthrough
case .wind_gusts_10m:
fallthrough
case .snowfall_convective_water_equivalent:
fallthrough
case .snowfall_water_equivalent:
fallthrough
case .cape:
if domain == .iconEps {
return nil // not in global
}
break
// all variables below are only in the D2 EPS model
case .wind_u_component_120m:
fallthrough
case .wind_v_component_120m:
fallthrough
case .temperature_120m:
fallthrough
case .wind_u_component_180m:
fallthrough
case .wind_v_component_180m:
fallthrough
case .rain:
fallthrough
case .showers:
fallthrough
case .snow_depth:
fallthrough
case .temperature_180m:
if domain != .iconD2Eps {
return nil
}
break
default:
return nil
}
}
if domain == .iconD2_15min {
switch self {
case .direct_radiation:
break
case .diffuse_radiation:
break
case .precipitation:
break
case .cape:
break
case .lightning_potential:
break
case .snowfall_height:
break
case .snowfall_water_equivalent:
break
case .freezing_level_height:
break
case .rain:
break
default:
return nil
// All other variables are not in ICON-D2 15 minutes
}
}
switch self {
case .soil_temperature_0cm: return ("t_so", "soil-level", 0)
case .soil_temperature_6cm: return ("t_so", "soil-level", 6)
case .soil_temperature_18cm: return ("t_so", "soil-level", 18)
case .soil_temperature_54cm: return ("t_so", "soil-level", 54)
case .soil_moisture_0_to_1cm: return ("w_so", "soil-level", 0)
case .soil_moisture_1_to_3cm: return ("w_so", "soil-level", 1)
case .soil_moisture_3_to_9cm: return ("w_so", "soil-level", 3)
case .soil_moisture_9_to_27cm: return ("w_so", "soil-level", 9)
case .soil_moisture_27_to_81cm: return ("w_so", "soil-level", 27)
case .wind_u_component_80m: return ("u", "model-level", domain.numberOfModelFullLevels-2)
case .wind_v_component_80m: return ("v", "model-level", domain.numberOfModelFullLevels-2)
case .wind_u_component_120m: return ("u", "model-level", domain.numberOfModelFullLevels-3)
case .wind_v_component_120m: return ("v", "model-level", domain.numberOfModelFullLevels-3)
case .wind_u_component_180m: return ("u", "model-level", domain.numberOfModelFullLevels-4)
case .wind_v_component_180m: return ("v", "model-level", domain.numberOfModelFullLevels-4)
case .temperature_80m: return ("t", "model-level", domain.numberOfModelFullLevels-2)
case .temperature_120m: return ("t", "model-level", domain.numberOfModelFullLevels-3)
case .temperature_180m: return ("t", "model-level", domain.numberOfModelFullLevels-4)
case .temperature_2m: return ("t_2m", "single-level", nil)
case .cloud_cover: return ("clct", "single-level", nil)
case .cloud_cover_low: return ("clcl", "single-level", nil)
case .cloud_cover_mid: return ("clcm", "single-level", nil)
case .cloud_cover_high: return ("clch", "single-level", nil)
case .convective_cloud_top:
let shallowOrDeepConvectionTop = domain == .iconD2 ? "htop_sc" : "htop_con"
return (shallowOrDeepConvectionTop, "single-level", nil)
case .convective_cloud_base:
let shallowOrDeepConvectionBase = domain == .iconD2 ? "hbas_sc" : "hbas_con"
return (shallowOrDeepConvectionBase, "single-level", nil)
case .precipitation: return ("tot_prec", "single-level", nil)
case .weather_code: return ("ww", "single-level", nil)
case .wind_v_component_10m: return ("v_10m", "single-level", nil)
case .wind_u_component_10m: return ("u_10m", "single-level", nil)
case .snow_depth: return ("h_snow", "single-level", nil)
case .sensible_heat_flux: return ("ashfl_s", "single-level", nil)
case .latent_heat_flux: return ("alhfl_s", "single-level", nil)
case .showers: return ("rain_con", "single-level", nil)
case .rain: return ("rain_gsp", "single-level", nil)
case .wind_gusts_10m: return ("vmax_10m", "single-level", nil)
case .freezing_level_height: return ("hzerocl", "single-level", nil)
case .relative_humidity_2m: return ("relhum_2m", "single-level", nil)
case .pressure_msl: return ("pmsl", "single-level", nil)
case .diffuse_radiation: return ("aswdifd_s", "single-level", nil)
case .direct_radiation: return ("aswdir_s", "single-level", nil)
case .snowfall_convective_water_equivalent: return ("snow_con", "single-level", nil)
case .snowfall_water_equivalent: return ("snow_gsp", "single-level", nil)
case .cape: return ("cape_ml", "single-level", nil)
case .lightning_potential:
return domain == .iconD2 ? ("lpi", "single-level", nil) : nil // only in icon d2
case .snowfall_height:
return domain == .icon ? nil : ("snowlmt", "single-level", nil) // not in icon global
case .updraft:
return domain == .iconD2 ? ("w_ctmax", "single-level", nil) : nil // only in icon d2
case .visibility:
return domain == .icon ? nil : ("vis", "single-level", nil) // not in icon global
}
}
var multiplyAdd: (multiply: Float, add: Float)? {
switch self {
case .temperature_2m: fallthrough
case .temperature_80m: fallthrough
case .temperature_120m: fallthrough
case .temperature_180m: fallthrough
case .soil_temperature_0cm: fallthrough
case .soil_temperature_6cm: fallthrough
case .soil_temperature_18cm: fallthrough
case .soil_temperature_54cm:
return (1, -273.15) // Temperature is stored in kelvin. Convert to celsius
case .pressure_msl:
return (1/100, 0) // convert to hPa
case .soil_moisture_0_to_1cm:
return (0.001 / 0.01, 0) // 1cm depth
case .soil_moisture_1_to_3cm:
return (0.001 / 0.02, 0) // 2cm depth
case .soil_moisture_3_to_9cm:
return (0.001 / 0.06, 0) // 6cm depth
case .soil_moisture_9_to_27cm:
return (0.001 / 0.18, 0) // 18cm depth
case .soil_moisture_27_to_81cm:
return (0.001 / 0.54, 0) // 54cm depth
default:
return nil
}
}
}
extension IconPressureVariable: IconVariableDownloadable {
func skipHour(hour: Int, domain: IconDomains, forDownload: Bool, run: Timestamp) -> Bool {
return false
}
var multiplyAdd: (multiply: Float, add: Float)? {
switch variable {
case .temperature:
return (1, -273.15)
case.geopotential_height:
// convert geopotential to height (WMO defined gravity constant)
return (1/9.80665, 0)
default:
return nil
}
}
func getVarAndLevel(domain: IconDomains) -> (variable: String, cat: String, level: Int?)? {
if domain == .iconD2_15min {
return nil
}
switch variable {
case .temperature:
return ("t", "pressure-level", level)
case .wind_u_component:
return ("u", "pressure-level", level)
case .wind_v_component:
return ("v", "pressure-level", level)
case .geopotential_height:
return ("fi", "pressure-level", level)
case .relative_humidity:
return ("relhum", "pressure-level", level)
}
}
}
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