CERRA

Spatial domain for the CERRA mesoscale data in windPRO (we cover approx. 300km from the coastline). Image showing average wind speeds at 100m from 2012-2012 - taken from the https://www.windprospecting.com platform.

Introduction

CERRA, is a high resolution hindcast dataset provided by Copernicus. The model holds data at 5.5km resolution and covers central Europe.

Dataset Overview

• Content: Limited feature and spatial-domain subset of the CERRA mesoscale dataset
  (we provide about 973.000 nodes in a distance of approx. 300km from the coastlines).
• Spatial resolution: 5.5km
• Temporal resolution: Timestep 1 hour
• Coverage: See the map to the right
• Period: In windPRO: 20+ years of data from 1999-01-01 to 2021-12-31
  
• Update schedule: Unknown (but is is our expectation that data is updated with a 3-4 month of delay from current date, due to ERA5 availability and computational demands).
  We will update this dataset when more recent data becomes available.
  

Dataset Parameters

A total of 80 parameters are available from the CERRA mesoscale data-subset in windPRO.

Table: Overview of CERRA Dataset Parameters (5.5 km grid).

Parameter	Unit	Description	Type
time		UTC time stamp (YYYY-MM-DD HH:MM)
wSpeed.x	m/s	Wind speeds at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
wDir.x	deg	Wind directions at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
sqrtTKE.x	m/s	Wind speed given as standard deviation in m/s. Derived from the turbulent kinetic energy (TKE) at different heights above ground (x). Use with caution, and avoid use for site assessment and loads as variability is underestimated. Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
press.x	Pa	Pressure at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
temp.x	celcius	Temperature at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
rh.x	%	Relative humidity at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
cloudWater.x	mg/kg	Cloud water content at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
cloudIce.x	mg/kg	Cloud icing content at different heights above ground (x). Heights (x): 15,50,75,100,150,200,300,500m	Instantaneous
wSpeed.10	m/s	Wind speeds at 10m.	Instantaneous
wDir.10	deg	Wind direction at 10m.	Instantaneous
wGust.10	deg	Wind gust at 10m.	Instantaneous
temp.2	celcius	Temperatures at 2m	Instantaneous
rh.2	%	Relative humidity at 2m	Instantaneous
psfc	Pa	Pressure at site	Instantaneous
msl	Pa	Pressure at mean sea level	Instantaneous
z0	m	Rougnhess length	Instantaneous
totalCloudCover	%	Total cloud cover in atmosphere	1h Average
totPrecip	kg/m^2	Total Precipitation at surface	1h Accumulated
sensHeatFlux	w/m2	Sensible Heat Flux at surface	Instantaneous
momFluxU	N m**-2	Instantaneous northward turbulent surface stress	Instantaneous
momFluxV	N m**-2	Instantaneous eastward turbulent surface stress	Instantaneous
zust	m/s	U-star (friction velocity)	Instantaneous
ssr	w/m2	Surface net solar radiation	1h Accumulated
ssrc	w/m2	Surface net solar radiation, clear sky	1h Accumulated
ssrd	w/m2	Surface solar radiation downwards	1h Accumulated

License and Attribution

Source: 
Distribution through EMD and windPRO - EMD International A/S, 2022. License: NLOD 2.0 and CC-BY-40.

Required windPRO License and Modules

This dataset can be accessed from the most recent version of windPRO given that you hold an active service agreement and a license to the following modules:

• BASIS
• METEO

External Links and References

• CERRA Home Page - here
• CERRA Product User Guide (at ECMWF Wiki) - here
• ACCORD Consortium home-page (developers of HARMONIE-ALADIN model) - here