WikiPrint - from Polar Technologies

The ?ECOMS UDG provides access to a reduced number of variables for the available datasets?. The following list of variables has been identified (and is periodically updated) according to the user's needs, receiving feedback from EUPORIAS WP22 (climate information indices, CIIs), WP23 (impact models), WP21 (calibration and downscaling) and SPECS WP61 (pilot applications) and WP52 (calibration and downscaling). See the section on the assessment of user's needs for more details.

The following labels are used in the table below (Available: The variable is available and ready to use through the ECOMS UDG; e: The variable exists in the original dataset; P: The variable exists in the original dataset and work is in progress to incorporate it to the UDG; blanks indicate lack of data).

Note that the short names shown in boldface correspond to standard variables according to the ?NetCDF Climate and Forecast Metadata Convention and to the naming convention within SPECS, but do not correspond to the original source name for the different datasets.

Availability for the following datasets:
short name Variable description Frequency Aggregation ?System4 seasonal_15 ?System4 seasonal_51 ?System4 annual_15 ?CFSv2 seasonal_16 ?SPECS-ESGF
tasNear-Surface air temperatureDailymean Available Available Available e
tasmaxDaily Maximum Near-Surface Air TemperatureDailymaximum Available Available Available Available e
tasminDaily Minimum Near-Surface Air TemperatureDailyminimum Available Available Available Available e
tpTotal precipitation amountDailyaccumulated Available Available Available Available e
pslSea Level PressureDailymean Available Available e Available e
psSurface air pressure Dailymean P(*) e
wspWind speed (at 10m) Dailymean P(*) e e e
tdps2m Dewpoint Temperature Dailymean P e e
hussSurface (2m) specific humidity Dailymean P(*) e
rsdsSurface Downwelling Shortwave RadiationDailymean P e e e
rldsNet Longwave Surface RadiationDailymean P e e e
sstSea surface temperatureDailymean e e e
uasEastward Near-Surface Wind Dailymean e e e e e
vasNorthward Near-Surface Wind Dailymean e e e e e
wspmaxWind speed (at 10m) Dailymaximum e e e e
wgustWind gust Dailymaximum e e
mrsoTotal Soil Moisture Content Dailymean e e
mrrosSurface runoff fluxDailyaccumulated e e e
mrroTotal Runoff Monthlymean e e e
ssroSub-surface runoff rateDailymean e e
prsnSnowfall Flux Dailymean e e e
wcslWater Content of Soil Layer Dailymean e e
Monthlymean e e
z850Geopotential 850mb Dailymean e e e e
z925Geopotential 925mb Dailymean e e
ua850Eastward WindDailymean e e e e
va850Northward WindDailymean e e e e
ua925Eastward WindDailymean e e e
va925Northward WindDailymean e e e
zg700Geopotential HeightDaily12 UTC e e e e
zg1000Geopotential HeightDaily12 UTC e e e

(*) These variables do NOT exist in the corresponding dataset, but they will be derived/approximated from other available variables. More information in the table of ?variables-datasets mapping.

Data Homogeneization: The different nature of the datasets, and the idiosyncratic naming and storage conventions often applied by the modelling centres, makes necessary an homogeneization across datasets in order to implement a truly user-friendly toolbox for data access. To this aim, the R package for data access has been developed. Data homogeneization is achieved through the creation of a common vocabulary. The particular variables of each dataset are then translated -and transformed if necessary- into the common vocabulary by means of a dictionary. Both features -vocabulary and dictionary- are described here?.