ERA5-Land daily: Air temperature at 2 meter above surface (2000 - 2020)

Overview:

ERA5-Land is a reanalysis dataset providing a consistent view of the evolution of land variables over several decades at an enhanced resolution compared to ERA5. ERA5-Land has been produced by replaying the land component of the ECMWF ERA5 climate reanalysis. Reanalysis combines model data with observations from across the world into a globally complete and consistent dataset using the laws of physics. Reanalysis produces data that goes several decades back in time, providing an accurate description of the climate of the past.

Air temperature (2 m):

Temperature of air at 2m above the surface of land, sea or in-land waters. 2m temperature is calculated by interpolating between the lowest model level and the Earth's surface, taking account of the atmospheric conditions.

The original ERA5-Land dataset (period: 2000 - 2020) has been reprocessed to:

- aggregate ERA5-Land hourly data to daily data (minimum, mean, maximum)

- while increasing the spatial resolution from the native ERA5-Land resolution of 0.1 degree (~ 9 km) to 30 arc seconds (~ 1 km) by image fusion with CHELSA data (V1.2) (https://chelsa-climate.org/).

For each day we used the corresponding monthly long-term average of CHELSA. The aim was to use the fine spatial detail of CHELSA and at the same time preserve the general regional pattern and fine temporal detail of ERA5-Land. The steps included aggregation and enhancement, specifically:

1. spatially aggregate CHELSA to the resolution of ERA5-Land

2. calculate difference of ERA5-Land - aggregated CHELSA

3. interpolate differences with a Gaussian filter to 30 arc seconds

4. add the interpolated differences to CHELSA

Data available is the daily average, minimum and maximum of air temperature (2 m).

Spatial resolution:

30 arc seconds (approx. 1000 m)

Temporal resolution:

Daily

Pixel values:

°C * 10 (scaled to Integer; example: value 238 = 23.8 %)

Software used:

GDAL 3.2.2 and GRASS GIS 8.0.0 (r.resamp.stats -w; r.relief)

Original ERA5-Land dataset license:

https://cds.climate.copernicus.eu/api/v2/terms/static/licence-to-use-copernicus-products.pdf

CHELSA climatologies (V1.2):

Data used: Karger D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E, Linder, H.P., Kessler, M. (2018): Data from: Climatologies at high resolution for the earth's land surface areas. Dryad digital repository. http://dx.doi.org/doi:10.5061/dryad.kd1d4

Original peer-reviewed publication: Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, P., Kessler, M. (2017): Climatologies at high resolution for the Earth land surface areas. Scientific Data. 4 170122. https://doi.org/10.1038/sdata.2017.122

Date ( Publication ): 2021-10-26

Identifier: dataset

Status: On going

Point of contact

mundialis GmbH & Co. KG - Markus Metz

Maintenance and update frequency: As needed

Keywords ( Theme )

air temperature

Continents, countries, sea regions of the world. ( Place )

Europe

GEMET - INSPIRE themes, version 1.0 ( Theme )

Meteorological geographical features

Use limitation: Licence to Use Copernicus Products

Access constraints: Other restrictions

Use constraints: Intellectual property rights

Other constraints: no limitations to public access

Other constraints: Licence to Use Copernicus Products (Version 1.2, Nov. 2019): "All users of Copernicus Products must provide clear and visible attribution to the Copernicus programme. The Licensee will communicate to the public the source of the Copernicus Products by crediting the Copernicus Climate Change and Atmosphere Monitoring Services" (full licence available here: https://cds.climate.copernicus.eu/api/v2/terms/static/licence-to-use-copernicus-products.pdf

Other constraints: { "id": "other-open", "name": "Licence to Use Copernicus Products", "url": "https://ads.atmosphere.copernicus.eu/api/v2/terms/static/licence-to-use-copernicus-products.pdf", "quelle": "Source: Copernicus Programme" }

Aggregate Datasetindentifier: 601ea08c-0768-4af3-a8fa-7da25fb9125b

Association Type: Source

Aggregate Datasetindentifier: 223c3eab-4a64-48c4-8b1e-e85a53d116df

Association Type: Cross reference

Spatial representation type: Grid

Distance: 1 km

Metadata language: en

Character set: UTF8

Topic category

Environment
Geoscientific information
Health
Climatology, meteorology, atmosphere

Description: Europe

Begin date: 2000-01-01

End date: 2020-12-31

Reference system identifier: EPSG / WGS 84 (EPSG:4326) / 8.6

Distribution format

GeoTIFF ( )

OnLine resource: available upon request

Hierarchy level: Dataset

Conformance result

Date ( Publication ): 2010-12-08

Other citation details: http://data.europa.eu/eli/reg/2010/1089/2014-12-31

Explanation: See specified reference

Pass: Yes

Statement: Dataset has been processed from original Copernicus Climate Data Store (ERA5-Land) data sources. As auxiliary data CHELSA climate data has been used.

Process step

No information provided.

gmd:MD_Metadata

File identifier: d08cd288-a2c5-4c8d-a621-eedc33fab449 XML

Metadata language: en

Character set: UTF8

Hierarchy level: Dataset

Date stamp: 2023-05-10T07:50:02

Metadata standard name: ISO 19115:2003/19139

Metadata standard version: 1.0

Point of contact

mundialis GmbH & Co. KG -

Citation proposal

(2021) . ERA5-Land daily: Air temperature at 2 meter above surface (2000 - 2020).
https://data.opendatascience.eu/geonetwork/srv/api/records/d08cd288-a2c5-4c8d-a621-eedc33fab449

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