Class WeatherParameters

Namespace

EncDotNet.S100.Datasets.Weather

Assembly

EncDotNet.S100.Datasets.Weather.dll

The canonical weather parameter table (design note weather-sources.md §3.5). GRIB2 and NetCDF-CF readers map their own codes to these ids; anything else is an unknown parameter, listed but not drawn.

public static class WeatherParameters

Inheritance

object

WeatherParameters

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

GRIB2 codes are (discipline, category, number) from WMO code table 4.2: discipline 0 category 2 is momentum, discipline 0 category 3 is mass and discipline 10 category 0 is oceanographic waves and discipline 10 category 3 is surface properties (water temperature); discipline 10 category 1 is currents. CF names are from the CF standard name table.

Where a row lists several codes or names, they're alternatives in order of preference: wave direction is the mean direction of combined wind waves and swell (10,0,14) before the primary wave direction (10,0,10), and wave period is the peak period (10,0,34) before the mean period of combined wind waves and swell (10,0,15) and the primary wave mean period (10,0,11). Mean sea level pressure is NCEP's PRMSL (0,3,1) before ECMWF's msl, which is plain pressure (0,3,0) at mean sea level: the row's level keeps surface pressure, also (0,3,0), out. Sea surface temperature takes the plain CF name first, then the GHRSST foundation, subskin and skin temperatures that satellite analyses such as MUR and the NOAA Geo-polar Blended analysis carry; GFS's surface TMP (0,0,0) is left out, as it is land skin temperature too. The current components take the plain CF names first, then the surface_ ones HF radar products carry. Current direction is the direction the water flows to, the oceanographic convention, unlike the wind and wave directions.

The current rows have no level: a model gives currents at its top layer (0 m for HYCOM, about 0.5 m for Copernicus, 15 m for OSCAR), and each reader keeps the level it finds, so a 15 m current is labelled as one.

Fields

CurrentGroup

Group id of the surface current: U, V, speed and direction.

public const string CurrentGroup = "current"

Field Value

string

CurrentSpeed

Canonical id of the current speed.

public const string CurrentSpeed = "current.speed"

Field Value

string

CurrentToDirection

Canonical id of the direction the current flows to, in degrees true.

public const string CurrentToDirection = "current.to_direction"

Field Value

string

CurrentU

Canonical id of the eastward (U) component of the sea water velocity.

public const string CurrentU = "current.u"

Field Value

string

CurrentV

Canonical id of the northward (V) component of the sea water velocity.

public const string CurrentV = "current.v"

Field Value

string

PressureGroup

Group id of the mean sea level pressure.

public const string PressureGroup = "pressure"

Field Value

string

PressureMsl

Canonical id of the air pressure reduced to mean sea level.

public const string PressureMsl = "pressure.msl"

Field Value

string

SeaSurfaceTemperature

Canonical id of the sea surface temperature, in kelvin.

public const string SeaSurfaceTemperature = "sea.temperature"

Field Value

string

SeaTemperatureGroup

Group id of the sea surface temperature.

public const string SeaTemperatureGroup = "sea.temperature"

Field Value

string

SwellGroup

Group id of the swell height.

public const string SwellGroup = "wave.swell"

Field Value

string

SwellHeight

Canonical id of the significant height of swell.

public const string SwellHeight = "wave.swell.hs"

Field Value

string

WaveDirection

Canonical id of the direction waves come from, in degrees true.

public const string WaveDirection = "wave.dir"

Field Value

string

WaveGroup

Group id of the combined sea state: height, direction and period.

public const string WaveGroup = "wave"

Field Value

string

WaveHeight

Canonical id of the significant height of combined wind waves and swell.

public const string WaveHeight = "wave.hs"

Field Value

string

WavePeriod

Canonical id of the wave period (peak, or mean when no peak period is given).

public const string WavePeriod = "wave.period"

Field Value

string

WindFromDirection

Canonical id of the direction the wind blows from at 10 m, in degrees true.

public const string WindFromDirection = "wind.from_direction"

Field Value

string

WindGroup

Group id of the 10 m wind: U, V, speed and direction.

public const string WindGroup = "wind"

Field Value

string

WindGust

Canonical id of the wind gust speed.

public const string WindGust = "wind.gust"

Field Value

string

WindGustGroup

Group id of the wind gust.

public const string WindGustGroup = "wind.gust"

Field Value

string

WindSeaDirection

Canonical id of the direction wind waves (wind sea) come from, in degrees true.

public const string WindSeaDirection = "wave.wind_sea.dir"

Field Value

string

WindSeaGroup

Group id of the wind sea: height and direction.

public const string WindSeaGroup = "wave.wind_sea"

Field Value

string

WindSeaHeight

Canonical id of the significant height of wind waves (wind sea).

public const string WindSeaHeight = "wave.wind_sea.hs"

Field Value

string

WindSpeed

Canonical id of the wind speed at 10 m.

public const string WindSpeed = "wind.speed"

Field Value

string

WindU

Canonical id of the eastward (U) wind component at 10 m.

public const string WindU = "wind.u"

Field Value

string

WindV

Canonical id of the northward (V) wind component at 10 m.

public const string WindV = "wind.v"

Field Value

string

Properties

All

Every row of the table, in the order of design note §3.5, with the wind-sea direction (NCEP's WVDIR, issue #1074) after the wind-sea height, then the sea surface temperature (issue #1227) and the surface current (issue #1228).

public static IReadOnlyList<WeatherParameterDefinition> All { get; }

Property Value

IReadOnlyList<WeatherParameterDefinition>

Methods

Find(string)

Finds the row with canonical id id.

public static WeatherParameterDefinition? Find(string id)

Parameters

id string

A canonical id, for example "wind.u".

Returns

WeatherParameterDefinition

The row, or null when the id isn't in the table.

FindByCfStandardName(string)

Finds the row a CF standard_name maps to.

public static WeatherParameterDefinition? FindByCfStandardName(string standardName)

Parameters

standardName string

The variable's standard_name attribute.

Returns

WeatherParameterDefinition

The row, or null when the name isn't in the table.

FindByGribCode(GribParameterCode)

Finds the row a GRIB2 parameter code maps to.

public static WeatherParameterDefinition? FindByGribCode(GribParameterCode code)

Parameters

code GribParameterCode

The GRIB2 (discipline, category, number).

Returns

WeatherParameterDefinition

The row, or null when the code isn't in the table.

Remarks

The level isn't checked here: a reader also compares the message's level with Level.