Research Tools: ERA Explorer App: Global Climate Data Made Accessible to All

From The European Centre for Medium-Range Weather Forecasts (ECMWF)/Copernicus Atmosphere Monitoring Service (CAMS):

Is Brussels really that rainy? Is Sevilla as warm as we think? And how do both cities compare? Based on the Copernicus Climate Change (C3S*) reanalysis dataset the new ERA Explorer app puts key global climate data at your fingertips.

With a fast and intuitive interface, the app allows us to explore 85 years of data providing climatological averages around the globe just by clicking any point on the map or using the search bar. It is complementary to the ERA5 temperature data offered by the Climate Pulse app, the C3S 1.5ºC App or the various datasets included in the more complex C3S’ Climate Atlas.

The base layer of the global interactive map can be set on temperatures or precipitation based on 30-year averages, so we can see at a glance which are the warmest/coldest or wettest/driest places on the planet or visualise the tropical rain belt very clearly.

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…with the ERA Explorer app users can analyse and compare the data from any corner of the world, from the most remote areas of the Gobi desert to the ice cap of Antarctica, two locations, by the way, showing extreme contrasts.

ERA Explorer is a little wonder of data processing technology. When you select a location on the map, the ERA Explorer calculates daily, monthly and annual statistics on-the-fly from over 80 years of hourly ERA5 data – all within a couple of seconds. This innovative approach is partly made possible by storing the data using Zarr, a community project for optimised cloud storage of large, multidimensional datasets.

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The new app is the result of months of design and development across departments at C3S and the wider ECWMF* with the support of the Horizon Europe ASPECT project under grant agreement No. 101081460.

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