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For examples of instantaneous parameters see: Mean sea level pressure and 2 metre temperature. For an interval-based parameter see: Maximum temperature at 2 metres in the last 24 hours.
To find out more about instantaneous and interval-based parameters, see ERA5 terminology: analysis and forecast; time and steps; instantaneous and accumulated and mean rates and min/max parameters.
Now there are other kinds of product groups which follow this pattern. Let's look at the atmospheric chemical constituents:
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