Fig. 3: Trends in thermodynamic and circulation variables for the month of April over the period 1979–2021 as reconstructed from ERA5 data.

Trends are shown for specifically a sea-level pressure (hPa/decade), b 850 hPa temperature (°C/decade), c 850 hPa mixing ratio ([g/kg]/decade) and d sea-surface temperature (°C/decade).