Meteorological Units¶

This page documents the units expected by the pycequeau meteorological workflow and the source-unit strings that can currently be normalized during preprocessing.

Important

All meteorological variables loaded from NetCDF must include a units attribute. If that metadata is missing, pycequeau cannot normalize the input.

Canonical units¶

The main internal target units are:

temperature and dewpoint temperature: C
precipitation: mm d-1
shortwave and longwave radiation: MJ m-2 d-1
cloud cover: 0-1
wind speed: km h-1
relative humidity: %
vapor pressure: mmHg
surface pressure: Pa

Reference Table¶

Variable	Supported names	Canonical unit	Accepted source units
Temperature	`tasmax`, `tMax`; `tasmin`, `tMin`; `d2m`	`C`	`C`, `K`
Precipitation	`tp`, `pr`, `pTot`	`mm d-1`	`mm d-1`, `mm`, `m d-1`, `m`, `kg m-2 s-1`
Shortwave radiation	`ssrd`, `ssr`, `rsds`, `rayonnement`	`MJ m-2 d-1`	`MJ m-2 d-1`, `MJ m-2`, `J m-2 d-1`, `J m-2`, `W m-2`
Longwave radiation	`strd`, `msdwlwrf`, `longwaveRad`	`MJ m-2 d-1`	`MJ m-2 d-1`, `MJ m-2`, `J m-2 d-1`, `J m-2`, `W m-2`
Cloud cover	`tcc`, `clt`, `nebulosite`	`0-1`	`0-1`, `fraction`, `1`, `%`, `percent`
Wind speed	`wind`, `sfcWind`, `vitesseVent`	`km h-1`	`km h-1`, `m s-1`
Relative humidity	`hurs`, `humiditeRelative`	`%`	`%`, `percent`, `0-1`, `fraction`, `1`
Vapor pressure	`vp`, `pression`	`mmHg`	`mmHg`, `Pa`, `kPa`
Surface pressure	`sp`, `surfacePressure`	`Pa`	`Pa`, `kPa`