Global Climate Monitor
Global & regional temperature
Daily-mean 2 m temperature anomaly vs 1991–2020, area-weighted, since 1979. Click legend entries to add regions (hemispheres, land/ocean, tropics, poles, continents); double-click to isolate one.
Evolution — the last 30 days
Daily maps as an animation — drag the slider or press play, and switch the field (2 m temperature, 500 hPa height, MSLP anomalies, or daily precipitation total) inside the panel.
2 m temperature anomaly
Daily-mean 2 m air temperature departure from the 1991–2020 ERA5 climatology.
500 hPa geopotential height anomaly
The mid-tropospheric circulation: daily-mean 500 hPa height departure from the 1991–2020 normal — ridges (red) and troughs (blue).
Mean sea-level pressure anomaly
Daily-mean MSLP departure from the 1991–2020 normal — the surface expression of the circulation anomalies above.
Recent monthly anomalies
Monthly-mean anomalies for the most recent complete months — drag the slider or press play, and switch the field (2 m temperature, 500 hPa height, MSLP, precipitation) inside the panel. ERA5 vs 1991–2020; IMERG precipitation vs 2001–2025.
Teleconnections — NAO · PNA · EPO · WPO · AO
Computed in-house, not fetched: a varimax-rotated principal-component analysis of our own ERA5 Z500 monthly anomaly history (1991–2020 base, 20–90N, √cos-weighted) yields the loading patterns — classical centers of action are used only to name and orient the modes — and AO is the unrotated leading EOF (the annular mode). Daily indices are projections of each day's anomaly field onto those patterns, standardized by day-of-year. Table shows the last 13 months with values; the chart below is the full monthly history — click legend entries to toggle.