The C3S Arctic Regional Reanalysis second generation (CARRA2) dataset contains daily and monthly meteorological variables at 2.5 km resolution. These variables are specified at single levels (including surface) and also at soil, height, pressure and model levels. These daily and monthly data are pre-calculated and have the following types depending on the variables: daily and monthly averages, extremes and totals.
The domain covers a full Arctic (pan-Arctic) region on a polar stereographic projection, reaching from south of Greenland to south of Alaska including the entire Arctic Ocean and a portion of Northern Europe.
The dataset has been produced with the use of the HARMONIE-AROME state-of-the-art regional numerical weather prediction model. High resolution reanalysis for the Arctic region is essential due to the more pronounced climate change in that region than elsewhere. This calls for a better description of this region providing additional details with respect to the global reanalyses (ERA5). The additional information is provided by the higher horizontal resolution, more local observations (from the Nordic countries and Greenland), better description of surface characteristics (high resolution satellite and physiographic data), high resolution dynamics and improved physical parameterisation of clouds and precipitation in particular. These details add value to the regional reanalysis with respect to its global counterpart.
The inputs to CARRA2 reanalysis are the observations, the ERA5 global reanalysis as lateral boundary conditions and the physiographic datasets describing the surface characteristics of the model. The observation values and information about their quality are used together to constrain the reanalysis where observations are available and provide information for the data assimilation system in areas in where less (or even no) observations are available.
More details about the reanalysis dataset and the extensive input data are given in the Documentation section.
The domain covers a full Arctic (pan-Arctic) region on a polar stereographic projection, reaching from south of Greenland to south of Alaska including the entire Arctic Ocean and a portion of Northern Europe.
The dataset has been produced with the use of the HARMONIE-AROME state-of-the-art regional numerical weather prediction model. High resolution reanalysis for the Arctic region is essential due to the more pronounced climate change in that region than elsewhere. This calls for a better description of this region providing additional details with respect to the global reanalyses (ERA5). The additional information is provided by the higher horizontal resolution, more local observations (from the Nordic countries and Greenland), better description of surface characteristics (high resolution satellite and physiographic data), high resolution dynamics and improved physical parameterisation of clouds and precipitation in particular. These details add value to the regional reanalysis with respect to its global counterpart.
The inputs to CARRA2 reanalysis are the observations, the ERA5 global reanalysis as lateral boundary conditions and the physiographic datasets describing the surface characteristics of the model. The observation values and information about their quality are used together to constrain the reanalysis where observations are available and provide information for the data assimilation system in areas in where less (or even no) observations are available.
More details about the reanalysis dataset and the extensive input data are given in the Documentation section.
Interval
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DOI
10.24381/b19380d8
Portal
Climate Data Store
Product Family
Data
Product Type
Reanalysis
Spatial Coverage
Arctic
Temporal Coverage
Past
Present
Variable Domain
Land (hydrology)
Land (cryosphere)
Atmosphere (surface)
Atmosphere (upper air)