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Introduction
The Copernicus Arctic Regional Reanalysis (CARRA) is a very high resolution (2.5 km) reanalysis system for two domains of the European part of the Arctic. The Arctic is an essential area of the Globe having a significantly stronger warming than other parts of the Earth. The CARRA dataset will cover 24 years of reanalysis between July, 1997 to June, 2021. The Arctic regional reanalysis system adds value to the ERA5 global reanalysis with the use of more (local) observations, with the better description of surface characteristic (like sea ice or glaciers for instance) and with its higher horizontal resolution. All the details of the CARRA system is described in its Full System Documentation.
Uncertainty information
Some static uncertainty information is provided for the Copernicus Arctic Regional Reanalysis (CARRA) dataset. There are two measures provided for uncertainties: one is called Upper Bound Error Standard Deviation and the other one Refined Error Standard Deviation. For the CARRA-East domain summer and winter values are provided, while only annual values for the CARRA-West domain. Details of the meaning of these values can be found in the CARRA Data User Guide. The table below indicates the available variables and levels. The data can be downloaded clicking on the domain names at each rows.
Variable mame | Levels | Domain |
Mean sea level pressure and surface pressure | Mean sea level and surface | CARRA-East and CARRA-West |
U-component wind velocity | Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 850, 900. 925. 950, 1000 hPa | CARRA-East and CARRA-West |
V-component wind velocity | Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 850, 900. 925. 950, 1000 hPa | CARRA-East and CARRA-West |
Temperature | Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 850, 900. 925. 950, 1000 hPa | CARRA-East and CARRA-West |
Geopotential | Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 850, 900. 925. 950, 1000 hPa | CARRA-East |
Relative humidity | Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 850, 900. 925. 950, 1000 hPa | CARRA-East |
| Specific humidity | Pressure levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 850, 900. 925. 950, 1000 hPa | CARRA-West |
Known issues
Data availability issues
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