Spaces:
Sleeping
Sleeping
File size: 11,353 Bytes
6ee917b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 |
enum GfsGraphCastVariableDerivedSurface: String, CaseIterable, GenericVariableMixable {
case windspeed_10m
case winddirection_10m
case wind_speed_10m
case wind_direction_10m
case surface_pressure
case weathercode
case weather_code
case is_day
case rain
case snowfall
case showers
case cloudcover
case cloudcover_low
case cloudcover_mid
case cloudcover_high
var requiresOffsetCorrectionForMixing: Bool {
return false
}
}
/**
Types of pressure level variables
*/
enum GfsGraphCastPressureVariableDerivedType: String, CaseIterable {
case windspeed
case winddirection
case dewpoint
case wind_speed
case wind_direction
case dew_point
case relativehumidity
case cloudcover
case cloud_cover
}
/**
A pressure level variable on a given level in hPa / mb
*/
struct GfsGraphCastPressureVariableDerived: PressureVariableRespresentable, GenericVariableMixable {
let variable: GfsGraphCastPressureVariableDerivedType
let level: Int
var requiresOffsetCorrectionForMixing: Bool {
return false
}
}
typealias GfsGraphCastVariableDerived = SurfaceAndPressureVariable<GfsGraphCastVariableDerivedSurface, GfsGraphCastPressureVariableDerived>
typealias GfsGraphCastVariableCombined = VariableOrDerived<GfsGraphCastVariable, GfsGraphCastVariableDerived>
struct GfsGraphCastReader: GenericReaderDerived, GenericReaderProtocol {
typealias Domain = GfsGraphCastDomain
typealias Variable = GfsGraphCastVariable
typealias Derived = GfsGraphCastVariableDerived
typealias MixingVar = GfsGraphCastVariableCombined
let reader: GenericReaderCached<GfsGraphCastDomain, GfsGraphCastVariable>
let options: GenericReaderOptions
public init?(domain: Domain, lat: Float, lon: Float, elevation: Float, mode: GridSelectionMode, options: GenericReaderOptions) throws {
guard let reader = try GenericReader<Domain, Variable>(domain: domain, lat: lat, lon: lon, elevation: elevation, mode: mode) else {
return nil
}
self.reader = GenericReaderCached(reader: reader)
self.options = options
}
public init(domain: Domain, gridpoint: Int, options: GenericReaderOptions) throws {
let reader = try GenericReader<Domain, Variable>(domain: domain, position: gridpoint)
self.reader = GenericReaderCached(reader: reader)
self.options = options
}
func get(raw: GfsGraphCastVariable, time: TimerangeDtAndSettings) throws -> DataAndUnit {
return try reader.get(variable: raw, time: time)
}
func prefetchData(raw: GfsGraphCastVariable, time: TimerangeDtAndSettings) throws {
try reader.prefetchData(variable: raw, time: time)
}
func prefetchData(variable: GfsGraphCastSurfaceVariable, time: TimerangeDtAndSettings) throws {
try prefetchData(variable: .raw(.surface(variable)), time: time)
}
func get(raw: GfsGraphCastSurfaceVariable, time: TimerangeDtAndSettings) throws -> DataAndUnit {
return try get(variable: .raw(.surface(raw)), time: time)
}
func prefetchData(derived: GfsGraphCastVariableDerived, time: TimerangeDtAndSettings) throws {
switch derived {
case .surface(let surface):
switch surface {
case .wind_speed_10m, .windspeed_10m, .wind_direction_10m, .winddirection_10m:
try prefetchData(variable: .wind_u_component_10m, time: time)
try prefetchData(variable: .wind_v_component_10m, time: time)
case .surface_pressure:
try prefetchData(variable: .pressure_msl, time: time)
try prefetchData(variable: .temperature_2m, time: time)
case .weather_code, .weathercode:
try prefetchData(variable: .cloud_cover, time: time)
try prefetchData(variable: .precipitation, time: time)
try prefetchData(variable: .temperature_2m, time: time)
case .is_day:
break
case .cloudcover:
try prefetchData(variable: .cloud_cover, time: time)
case .cloudcover_low:
try prefetchData(variable: .cloud_cover_low, time: time)
case .cloudcover_mid:
try prefetchData(variable: .cloud_cover_mid, time: time)
case .cloudcover_high:
try prefetchData(variable: .cloud_cover_high, time: time)
case .rain, .snowfall:
try prefetchData(variable: .precipitation, time: time)
try prefetchData(variable: .temperature_2m, time: time)
case .showers:
try prefetchData(variable: .precipitation, time: time)
}
case .pressure(let v):
switch v.variable {
case .windspeed, .wind_speed:
fallthrough
case .winddirection, .wind_direction:
try prefetchData(raw: .pressure(GfsGraphCastPressureVariable(variable: .wind_u_component, level: v.level)), time: time)
try prefetchData(raw: .pressure(GfsGraphCastPressureVariable(variable: .wind_v_component, level: v.level)), time: time)
case .dewpoint, .dew_point:
try prefetchData(raw: .pressure(GfsGraphCastPressureVariable(variable: .temperature, level: v.level)), time: time)
try prefetchData(raw: .pressure(GfsGraphCastPressureVariable(variable: .relative_humidity, level: v.level)), time: time)
case .relativehumidity:
try prefetchData(raw: .pressure(GfsGraphCastPressureVariable(variable: .relative_humidity, level: v.level)), time: time)
case .cloudcover, .cloud_cover:
try prefetchData(raw: .pressure(GfsGraphCastPressureVariable(variable: .relative_humidity, level: v.level)), time: time)
}
}
}
func get(derived: GfsGraphCastVariableDerived, time: TimerangeDtAndSettings) throws -> DataAndUnit {
switch derived {
case .surface(let variableDerivedSurface):
switch variableDerivedSurface {
case .windspeed_10m, .wind_speed_10m:
let u = try get(raw: .wind_u_component_10m, time: time).data
let v = try get(raw: .wind_v_component_10m, time: time).data
let speed = zip(u,v).map(Meteorology.windspeed)
return DataAndUnit(speed, .metrePerSecond)
case .winddirection_10m, .wind_direction_10m:
let u = try get(raw: .wind_u_component_10m, time: time).data
let v = try get(raw: .wind_v_component_10m, time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .surface_pressure:
let temperature = try get(raw: .temperature_2m, time: time).data
let pressure = try get(raw: .pressure_msl, time: time)
return DataAndUnit(Meteorology.surfacePressure(temperature: temperature, pressure: pressure.data, elevation: reader.targetElevation), pressure.unit)
case .weathercode, .weather_code:
let cloudcover = try get(raw: .cloud_cover, time: time).data
let precipitation = try get(raw: .precipitation, time: time).data
let snowfall = try get(derived: .surface(.snowfall), time: time).data
return DataAndUnit(WeatherCode.calculate(
cloudcover: cloudcover,
precipitation: precipitation,
convectivePrecipitation: nil,
snowfallCentimeters: snowfall,
gusts: nil,
cape: nil,
liftedIndex: nil,
visibilityMeters: nil,
categoricalFreezingRain: nil,
modelDtSeconds: time.dtSeconds), .wmoCode
)
case .is_day:
return DataAndUnit(Zensun.calculateIsDay(timeRange: time.time, lat: reader.modelLat, lon: reader.modelLon), .dimensionlessInteger)
case .cloudcover:
return try get(raw: .cloud_cover, time: time)
case .cloudcover_low:
return try get(raw: .cloud_cover_low, time: time)
case .cloudcover_mid:
return try get(raw: .cloud_cover_mid, time: time)
case .cloudcover_high:
return try get(raw: .cloud_cover_high, time: time)
case .snowfall:
let temperature = try get(raw: .temperature_2m, time: time)
let precipitation = try get(raw: .precipitation, time: time)
return DataAndUnit(zip(temperature.data, precipitation.data).map({ $1 * ($0 >= 0 ? 0 : 0.7) }), .centimetre)
case .rain:
let temperature = try get(raw: .temperature_2m, time: time)
let precipitation = try get(raw: .precipitation, time: time)
return DataAndUnit(zip(temperature.data, precipitation.data).map({ $1 * ($0 >= 0 ? 1 : 0) }), .millimetre)
case .showers:
let precipitation = try get(raw: .precipitation, time: time)
return DataAndUnit(precipitation.data.map({min($0, 0)}), precipitation.unit)
}
case .pressure(let v):
switch v.variable {
case .windspeed, .wind_speed:
let u = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .wind_u_component, level: v.level)), time: time)
let v = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .wind_v_component, level: v.level)), time: time)
let speed = zip(u.data,v.data).map(Meteorology.windspeed)
return DataAndUnit(speed, u.unit)
case .winddirection, .wind_direction:
let u = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .wind_u_component, level: v.level)), time: time).data
let v = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .wind_v_component, level: v.level)), time: time).data
let direction = Meteorology.windirectionFast(u: u, v: v)
return DataAndUnit(direction, .degreeDirection)
case .dewpoint, .dew_point:
let temperature = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .temperature, level: v.level)), time: time)
let rh = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .relative_humidity, level: v.level)), time: time)
return DataAndUnit(zip(temperature.data, rh.data).map(Meteorology.dewpoint), temperature.unit)
case .cloudcover, .cloud_cover:
let rh = try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .relative_humidity, level: v.level)), time: time)
return DataAndUnit(rh.data.map({Meteorology.relativeHumidityToCloudCover(relativeHumidity: $0, pressureHPa: Float(v.level))}), .percentage)
case .relativehumidity:
return try get(raw: .pressure(GfsGraphCastPressureVariable(variable: .relative_humidity, level: v.level)), time: time)
}
}
}
}
|