eb4a552e-6782-415f-81ea-89ea1a584635 mundialis GmbH & Co. KG info@mundialis.de https://www.mundialis.de/en/ WWW:LINK-1.0-http--link 2022-04-21T14:29:41 ISO 19115:2003/19139 1.0 WGS 84 (EPSG:4326) EPSG 8.6 Daily time series of spatially enhanced relative humidity for Europe at 30 arc seconds resolution (2000 - 2021) derived from ERA5-Land data 2022-03-14 dataset 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. Processing steps: The original hourly ERA5-Land air temperature 2 m above ground and dewpoint temperature 2 m data has been spatially enhanced from 0.1 degree to 30 arc seconds (approx. 1000 m) spatial resolution by image fusion with CHELSA data (https://chelsa-climate.org/). Subsequently, the temperature time series have been aggregated on a daily basis. From these, daily relative humidity has been calculated for the time period 01/2000 - 07/2021. Relative humidity (rh2m) has been calculated from air temperature 2 m above ground (Ta) and dewpoint temperature 2 m above ground (Td) using the formula for saturated water pressure from Wright (1997): maximum water pressure = 611.21 * exp(17.502 * Ta / (240.97 + Ta)) actual water pressure = 611.21 * exp(17.502 * Td / (240.97 + Td)) relative humidity = actual water pressure / maximum water pressure Data provided is the daily averages of relative humidity. Resultant values have been converted to represent percent * 10, thus covering a theoretical range of [0, 1000]. File naming scheme (YYYY = year; MM = month; DD = day): ERA5_land_rh2m_avg_daily_YYYYMMDD.tif Projection + EPSG code: Latitude-Longitude/WGS84 (EPSG: 4326) Spatial extent: north: 82:00:30N south: 18N west: 32:00:30W east: 70E Spatial resolution: 30 arc seconds (approx. 1000 m) Temporal resolution: Daily Pixel values: Percent * 10 (scaled to Integer; example: value 738 = 73.8 %) Software used: GDAL 3.2.2 and GRASS GIS 8.0.0 Original dataset license: https://apps.ecmwf.int/datasets/licences/copernicus/ Processed by: mundialis GmbH & Co. KG, Germany (https://www.mundialis.de/) Reference: Wright, J.M. (1997): Federal meteorological handbook no. 3 (FCM-H3-1997). Office of Federal Coordinator for Meteorological Services and Supporting Research. Washington, DC Acknowledgements: This study was partially funded by EU grant 874850 MOOD. The contents of this publication are the sole responsibility of the authors and don't necessarily reflect the views of the European Commission. Markus Metz mundialis GmbH & Co. KG info@mundialis.de https://www.mundialis.de/en/ WWW:LINK-1.0-http--link https://data.mundialis.de:/geonetwork/srv/api/records/eb4a552e-6782-415f-81ea-89ea1a584635/attachments/00_ERA5_Land_relative_humidity.png relative humidity geospatial analysis environment meteorology ERA5-Land CHELSA MOOD-H2020 Europe Atmospheric conditions Meteorological geographical features GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme None no limitations to public access Creative Commons Namensnennung – 4.0 International (CC BY 4.0) { "id": "cc-by/4.0", "name": "Creative Commons Namensnennung – 4.0 International", "url": "http://creativecommons.org/licenses/by/4.0/", "quelle": "Source: mundialis GmbH & Co. KG" } 782cdbf5-bfda-4813-a5d7-336ebbc241bb b9ce7dba-4130-428d-96f0-9089d8b9f4a5 30 geoscientificInformation climatologyMeteorologyAtmosphere Europe 2000-01-01 2021-07-31 -36.00 70.00 18.00 82.00 GeoTIFF https://doi.org/10.5281/zenodo.6342776 WWW:DOWNLOAD-1.0-http--download Daily Relative Humidity (2000 - 2004) https://doi.org/10.5281/zenodo.6342822 WWW:DOWNLOAD-1.0-http--download Daily Relative Humidity (2005 - 2009) https://doi.org/10.5281/zenodo.6344012 WWW:DOWNLOAD-1.0-http--download Daily Relative Humidity (2010 - 2014) https://doi.org/10.5281/zenodo.6344066 WWW:DOWNLOAD-1.0-http--download Daily Relative Humidity (2015 - 2019) https://doi.org/10.5281/zenodo.6344125 WWW:DOWNLOAD-1.0-http--download Daily Relative Humidity (2020 - 2021) COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 http://data.europa.eu/eli/reg/2010/1089/2014-12-31 See specified reference true derived from ERA5-Land reanalysis data, spatially enhanced by image fusion with CHELSA data