HRES-WAM (High RESolution WAve Model) is coupled to the atmospheric model (HRES) while HRES-SAW (High RESolution Stand Alone Wave model) is run as a standalone model.

HRES-WAM and HRES-SAW offer the same parameters globally. However, the resolution and the dissemination schedule are different.

## Domain

**HRES-WAM:**Global**HRES-SAW**: Between latitudes -78 and 90

Both HRES-WAM and HRES-SAW models computes between the latitudes -78 and 90. For HRES-WAM, the output grid is artificially extended to -90.

## Product description

**HRES-WAM:**0.125° x 0.125° lat/long grid or any multiple thereof (global or sub-area)**HRES-SAW**: 0.1° x 0.1° lat/long grid or any multiple thereof (global or sub-area)

#### Single level -forecast

Forecast time step | Base time | |
---|---|---|

T+0 to T+144 |
3-hourly | 00 UTC and 12 UTC |

T+150h to T+240h | 6-hourly | 00 UTC and 12 UTC |

## Dissemination schedule

**HRES-WAM** (dissemination data stream indicator = P)

Analysis 06/12 - 12 UTC based Forecast time | Time available | Analysis 18/00 - 00 UTC based forecast time | Time available |
---|---|---|---|

Analysis 06:00 | 17:35 | Analysis 18:00 | 05:35 |

Analysis 12:00 | 17:40 | Analysis 00:00 | 05:40 |

Forecast day 1 | 17:52 | Forecast day 1 | 05:52 |

Forecast day 10 | 18:55 | Forecast day 10 | 06:55 |

**HRES-SAW** (dissemination data stream indicator = M)

Analysis 06/12 - 12 UTC based Forecast time | Time available | Analysis 18/00 00 UTC based forecast time | Time available |
---|---|---|---|

Analysis 06:00 | 19:20 | Analysis 18:00 | 07:20 |

Analysis 12:00 | 19:21 | Analysis 00:00 | 07:21 |

Forecast day 1 | 19:23 | Forecast day 1 | 07:23 |

Forecast day 5 | 19:35 | Forecast day 5 | 07:35 |

Forecast day 10 | 19:45 | Forecast day 10 | 07:45 |

## Parameters

Short Name | Long name | Description | Unit | ID | Additional information |
---|---|---|---|---|---|

2DFD | 2D wave spectra | Wave variance spectrum archived as a field for each discretized frequency and directional bin (what is actually encoded is log10 of the variance spectrum) | m2 s radian-1 | 140251 |
Coded in 36 frequencies and 36 directions Not for step 0 |

BFI | Benjamin-Feir index | Benjamin-Feir index | dimensionless | 140253 | |

CDWW | Coefficient of drag with waves | Atmospheric drag coefficient influenced by the presence of waves for all wave model sea points | dimensionless | 140233 | |

DWI | 10 metre wind direction | Neutral 10m wind direction for all wave model sea points | degrees | 140249 | |

DWPS | Wave spectral directional width for swell | Spectral width of the total swell spectrum | dimensionless | 140228 | |

DWWW | Wave spectral directional width for wind waves | Spectral width of the wind sea spectrum | dimensionless | 140225 | |

H1012 | Significant wave height of all waves with periods within the inclusive range from 10 to 12 seconds | Significant wave height of all waves with periods within the inclusive range from 10 to 12 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/12 and 1/10 Hz of the two-dimension wave spectrum | m | 140114 |
43r1 |

H1214 | Significant wave height of all waves with periods within the inclusive range from12 to 14 seconds | Significant wave height of all waves with periods within the inclusive range from 12 to 14 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/14 and 1/12 Hz of the two-dimension wave spectrum | m | 140115 |
43r1 |

H1417 | Significant wave height of all waves with periods within the inclusive range from 14 to 17 seconds | Significant wave height of all waves with periods within the inclusive range from 14 to 17 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/17 and 1/14 Hz of the two-dimension wave spectrum | m | 140116 |
43r1 |

H1721 | Significant wave height of all waves with periods within the inclusive range from 17 to 21 seconds | Significant wave height of all waves with periods within the inclusive range from 17 to 21 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/21 and 1/17 Hz of the two-dimension wave spectrum | m | 140117 |
43r1 |

H2125 | Significant wave height of all waves with periods within the inclusive range from 21 to 25 seconds | Significant wave height of all waves with periods within the inclusive range from 21 to 25 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/25 and 1/21 Hz of the two-dimension wave spectrum | m | 140118 |
43r1 |

H2530 | Significant wave height of all waves with periods within the inclusive range from 25 to 30 seconds | Significant wave height of all waves with periods within the inclusive range from 25 to 30 seconds, where the significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies between 1/30 and 1/25 Hz of the two-dimension wave spectrum | m | 140119 |
43r1 |

HMAX | Maximum individual weight | Estimation value of the maximum individual wave height | m | 140218 | |

MDTS | Mean direction of total swell | Mean direction computed from the total swell spectrum | degrees | 140238 | |

MDWW | Mean direction of wind waves | Mean direction computed from the windsea spectrum | degrees | 140235 | |

MP1 | Mean wave period based on first moment | Mean wave period computed using the first frequency moment of the spectrum | s | 140220 | |

MP2 | Mean wave period based on second moment | Mean wave period computed using the second frequency moment of the spectrum | s | 140221 | |

MPTS | Mean period of total swell | Mean wave period computed using the reciprocal frequency moment of the total swell spectrum | s | 140239 | |

MPWW | Mean period of wind waves | Mean wave period computed using the reciprocal frequency moment of the windsea spectrum | s | 140236 | |

MSQS | Mean square slope of waves | Mean square slope computed from the full wave spectrum | dimensionless | 140244 | |

MWD | Mean wave direction | Mean wave direction computed using the full spectrum | degrees | 140230 | |

MWD1 | Mean wave direction of first swell partition | Mean wave direction computed using the first most energetic partition of the swell spectrum | degrees | 140122 | |

MWD2 | Mean wave direction of second swell partition | Mean wave direction computed using the second most energetic partition of the swell spectrum | degrees | 140125 | |

MWD3 | Mean wave direction of third swell partition | Mean wave direction computed using the third most energetic partition of the swell spectrum | degrees | 140128 | |

MWP | Mean wave period | Mean wave period computed using the reciprocal frequency moment of the full spectrum | s | 140232 | |

MWP1 | Mean wave period of first swell partition | Mean wave period computed using the reciprocal frequency moment of the first most energetic partition of the swell spectrum | s | 140123 | |

MWP2 | Mean wave period of second swell partition | Mean wave period computed using the reciprocal frequency moment of the second most energetic partition of the swell spectrum | s | 140126 | |

MWP3 | Mean wave period of third swell partition | Mean wave period computed using the reciprocal frequency moment of the third most energetic partition of the swell spectrum | s | 140129 | |

P1PS | Mean wave period based on first moment for swell | Mean wave period computed using first frequency moment of the total swell spectrum | s | 140226 | |

P1WW | Mean wave period based on first moment for wind waves | Mean wave period computed using first frequency moment of the windsea spectrum | s | 140223 | |

P2PS | Mean wave period based on second moment for swell | Spectral mean wave period computed using second frequency moment of the total swell spectrum | s | 140227 | |

P2WW | Mean wave period based on second moment for wind waves | Mean wave period computed using second frequency moment of the windsea spectrum | s | 140224 | |

PHIAW | Normalized energy flux into waves | dimensionless | 140211 | ||

PHIOC | Normalized energy flux into ocean | dimensionless | 140212 | ||

PP1D | Peak period of 1D-spectra | Period corresponding to the peak of the one-dimensional wave spectrum | s | 140231 | |

RHOAO | Air density over the oceans | air density over the oceans as derived from the lowest model temperature, specific humidity and pressure of the atmospheric model over all wave model sea points NOTE: because it is produced as a wave model output, it is only defined over the ocean |
kg m**-3 | 140209 | |

SHTS | Significant height of total swell | Period corresponding to the peak of the one-dimensional wave spectrum | m | 140237 | |

SHWW | Significant height of wind waves | Significant wave height for the windsea wave spectrum | m | 140234 | |

SH10 | Significant wave height of all waves with period larger than 10s | - | m | 140120 | |

SWH | Significant wave height of combined wind waves and swell | Significant wave height for the full wave spectrum | m | 140229 | |

SWH1 | Significant wave height of first swell partition | Significant wave height for the first most energetic partition of the swell spectrum | m | 140121 | |

SWH2 | Significant wave height of second swell partition | Significant wave height for the second most energetic partition of the swell spectrum | m | 140124 | |

SWH3 | Significant wave height of third swell partition | Significant wave height for the third most energetic partition of the swell spectrum | m | 140127 | |

TAUOC | Normalized stress into ocean | dimensionless | 140214 | ||

TMAX | Period corresponding to maximum individual wave height | Period corresponding to maximum individual wave height | s | 140217 | |

UST | U-Component stokes drift | U-component stokes drift | m s-1 | 140215 | |

VST | V-Component stokes drift | V-component stokes drift | m s-1 | 140216 | |

WDW | Wave spectral directional width | Directional width of the full wave spectrum | dimensionless | 140222 | |

WEFXD | Wave energy flux mean direction | Spectral mean direction over all frequencies and direction of the product of the group velocity vector and the two-dimensional energy wave spectrum. | Degree true | 140113 |
43r1 |

WEFXM | Wave energy flux magnitude | Integral over all frequencies and directions of the product of the group speed and the two-dimensional energy wave spectrum. | W/m | 140112 |
43r1 |

WIND | 10 metre wind speed | Neutral 10m wind speed for all wave model sea points | m s**-1 | 140245 | |

WMB (inv) | Model Bathymetry | Water depth used by the wave model | m | 140219 | Analysis only If requested, provided free of charge |

WSK | Wave spectral kurtosis | Kurtosis of the sea surface elevation due to waves | dimensionless | 140252 | |

WSP | Wave spectral peakedness | Peakedness factor of the full wave spectrum | dimensionless | 140254 | |

WSS | Wave Spectral Skewness | Skewness of the sea surface elevation due to waves | dimensionless | 140207 | |

WSTAR | Free convective velocity over the oceans | This parameter is used to prescribe the level of wind gustiness which influence wave growth. It is calculated using parameters from the atmospheric model: w* = u* {1/kappa (Zi/(-L))} ^1/3 where u* is the friction velocity kappa is the von Karman constant Zi is the height of the lowest inversion L is the Monin-Obukhov length NOTE: because it is produced as a wave model output, it is only defined over the ocean |
m s**-1 | 140208 |

*Page last updated: Dec 2016*