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titleHistory of modification


Version

Date

Description of modifications

Chapter/Sections

1.0

01-03-2022

First version

Whole document


28-11-2022

Updated Section 'Known issues' 

Added Paragraph 6.3


Acronyms

Expand
titleList of acronyms


ACCORDA Consortium for COnvection-scale modelling Research and Development

ALADIN

Aire Limitée Adaptation dynamique Développement InterNational

AMVAtmospheric Motion Vectors

C3S

Copernicus Climate Change Service

CDS

Climate Data Store

CERRA

Copernicus European Regional ReAnalysis

CERRA-EDA

Copernicus European Regional ReAnalysis Ensemble of Data Assimilation

ECMWF

European Centre for Medium-range Weather Forecasts

ECV

Essential Climate Variables

EDA

Ensemble of Data Assimilation

ERA5

The 5th generation of ECMWF reanalysis

EU

European Union

FP7

Seventh Framework Programme of EU

GISGeographic Information System
GNSS-ROGlobal Navigation Satellite System - Radio Occultation
GRIB

GRIdded Binary

GRIB2GRIB edition 2

HARMONIE

HIRLAM ALADIN Research on Mesoscale Operational NWP In Euromed

HIRLAM

HIgh Resolution Limited Area Model

IASI Infrared Atmospheric Sounding Interferometer

MESCAN

MESosCale ANalysis

MSUMicrowave Sounding Unit

SURFEX

SURrFace EXternalisée

UERRA

Uncertainties in Ensembles of Regional ReAnalyses


...


Name

Unit

GRIB code

Analysis 3 hourly

Forecast
1,2,3,…

Height

1.

10m wind speed

m/s

207

yes

yes

10m

2.

10m wind gust since previous post-processing 

m/s

49

-

yes

10m

3.

10m wind direction

degree of true North

260260

yes

yes

10m

4.

2m relative humidity

%

260242

yes

yes

2m

5.

2m temperature

K

167

yes

yes

2m

6.

Albedo

%

260509

yes

yes

surface

7.

Evaporation

kg/m2

260259

-

yes

surface

8.

Total column integrated water vapour

kg/m2

260057

yes

yes

vertically integrated above the surface

9.

Total precipitation

kg/m2

228228

-

yes

surface

10.

Maximum 2m temperature since previous post-processing

K

201

-

yes

2m

11.

Minimum 2m temperature since previous post-processing 

K

202

-

yes

2m

12.

Skin temperature

K

235

yes

yes

surface

13.

Surface latent heat flux

J/m2

147

-

yes

surface

14.

Surface sensible heat flux

J/m2

146

-

yes

surface

15.

Time-integrated surface direct short-wave radiation

J/m2

260264

-

yes

surface

16.

Surface net solar radiation

J/m2

176

-

yes

surface

17.

Surface solar radiation downwards

J/m2

169

-

yes

surface

18.

Surface net thermal radiation

J/m2

177

-

yes

surface

19.

Surface thermal radiation downwards

J/m2

175

-

yes

surface

20.

Surface net solar radiation, clear sky

J/m2

210

-

yes

surface

21.

Surface net thermal radiation, clear sky

J/m2

211

-

yes

surface

22.

Momentum flux at the surface u-component

N/m2

235017

-

yes

surface

23.

Momentum flux at the surface v-component

N/m2

235018

-

yes

surface

24.

Mean sea level pressure

Pa

151

yes

yes

surface

25.

Surface pressure

Pa

134

yes

yes

surface

26.

High cloud cover

%

3075

yes

yes

above 5000m

27.

Low cloud cover

%

3073

yes

yes

surface-2500m

28.

Medium cloud cover

%

3074

yes

yes

2500m-5000m

29.

Total cloud cover

%

228164

yes

yes

above ground

30.

Snow density

kg/m3

33

yes

yes

surface

31.

Snow depth

m

3066

yes

yes

surface

32.

Snow depth water equivalent

kg/m2

228141

yes

yes

surface

33.

Snowfall water equivalent

kg/m2

228144

-

yes

surface

34.

Land-sea mask

dimensionless

172

yes

-

surface

35.

Orography

m2/s2

228002

yes

-

surface

36.

Surface roughness

m

173

yes

yes

surface

37.

Soil temperature

K

260360

yes

yes

top layer of soil
38.

Liquid Volumetric soil moisture  (non-frozen) 

m3/m3

260199

yes

yes

top layer of soil
39.

Volumetric soil moisture

m3/m3

260210

yes

yes

top layer of soil

...

The metadata for the forecast step range is incorrect in the GRIB2 files for the maximum 2m temperature since previous post-processing and the minimum 2m temperature since previous post-processing. The correct step range is given in the table below.

Step range in the metadata
of the GRIB2 files (incorrect)

Correct step range

0-1

0-1
0-20-2
0-30-3
0-43-4
0-53-5
0-63-6
0-96-9
0-129-12
0-1512-15
0-1815-18
0-2118-21
0-2421-24
0-2724-27
0-3027-30

 Minor data assimilation issues (issues when some observations were not available)

...

For completeness, a list of the occurrences of missing observational data and affected periods are listed below. 

CERRA
Affected periodDescription
2020-10-01 to 2021-06-30Fewer SYNOP data than usual. About 1850 instead of 2100 stations.
2021-02-01 to 2021-03-31Only few AMV data assimilated in this period.

2020-04-01 to 2021-03-31

2019-01-01 to 2019-04-09  

Only very few ocean buoy observations.

2019-01-01 to 2019-03-09

Data assimilation used a slightly degraded B-matrix. The climatological part of the B-matrix was shifted by two months, i.e. the November climatology was used instead of the January climatology. 


CERRA-EDA
Affected periodDescription

2021-04-01 to 2021-04-30  

IASI missing for both METOP-A and METOP-B

2019-01-01 to 2019-05-31

No AMV included.

Only very few ocean buoy observations.

2019-01-01 to 2019-01-02

No additional local observations included for Greenland, Iceland, Norway, Sweden, Finland, and France.

2016-10-03

The 18UTC cycle was ran without TEMP and PILOT data.

1984-09-01 to present

No MSU data.

Missing forecast parameters

CERRA 
Parameter
Forecast Time and Date
Forecast lead time

10m wind gust since previous post-processing

00 UTC, 1 April 2021

+2h; +4h to +30h
Minimum 2m temperature since previous post-processing00 UTC, 1 April 2021+6h

Maximum 2m temperature since previous post-processing 

00 UTC, 1 April 2021+6h


CERRA-EDA
Parameter
Forecast Time and Date
Forecast lead time

10m wind gust since previous post-processing

00 UTC, 1 April 2021

06 UTC, 1 April 2021

+2h; +4h to +6h

+2h;  +4h to +6h

Minimum 2m temperature since previous post-processing

00 UTC, 1 April 2021

06 UTC, 1 April 2021

+6h

+6h

Maximum 2m temperature since previous post-processing 

00 UTC, 1 April 2021

06 UTC, 1 April 2021

+6h

+6h

References


...