Exercise

Calculating the trend in European temperatures

You want to calculate the average European temperature from 1980 to present using the ERA5 dataset. This data is a Zarr dataset of monthly mean temperature and precipitation, on a grid of latitudes and longitudes. The Zarr file is chunked so that each subfile on the disk is an array of 15 latitudes, 15 longitudes, and 12 months.

xarray has been imported for you as xr.

Instructions

100 XP

Use xarray to open the "data/era_eu.zarr" dataset.
Calculate the mean of the temp DataArray over the lat and lon dimensions.
Perform a rolling mean over the time dimension using a window size of 12.
Plot the resulting time series of temp_rolling_mean.