![]() ![]() It offers global weather data in 30 km resolution and hourly values. ERA5 is available as open-data and you can download it from the Climate Data Store (CDS). A reanalysis still depends on measurement data, but gaps and inconsistencies can be corrected more easily.ĮRA5 is the fifth reanalysis weather dataset from the publicly funded EU Copernicus program and implemented by ECMWF. The principle is:Ĭollect station measurements from the last decadeĬombine them with satellite, radar and airplane observationsĪ reanalysis dataset can therefore provide global and consistent historical weather data bound by physical models. Many researchers faced these issues in the past and started to work on “reanalysis“ weather datasets. You can work around that, by combining data from multiple sources, filling gaps, ensuring consistency and using weather models to bridge larger distances between stations. Quality, accuracy and reliability differs.Įven if you find weather station data for your country, odds are that there are no weather stations close to the location of interest or that the time-series data are incomplete or inconsistent. High quality weather stations measure weather according to WMO standards, others were just recently installed with commodity hardware and measure less reliantly with infrequent maintenance intervals. ![]() Other NWS do not even share data on request. Some NWS offer data on open-data servers in CSV or scientific data files. Often, the national weather services (NWS) are a good start as they operate high quality weather measurements stations over decades. With climate change and more extreme weather patterns, many journalists rely on measurements to objectively evaluate whether the current heat spell or drought is a new record high or “just weather”. While working in the academic field, students often face the challenge of getting historical weather data for their research papers to analyse their hypothesis more deeply. ![]()
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