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Climagrams

Climagrams show the distributions of area average anomalies for broad-scale indices (e.g. sea temperatures across a region, teleconnection indices, standard 'monsoon' indices, etc.).  They are produced for a number of defined areas across the globe (Fig.8.3.4.2-1, Fig.8.3.4.2-2).  

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The climagram shows the range of anomalies of the forecast monthly mean values of several forecast variables in box and whisker format.   These may be directly compared with seasonal model climate (shorter S-M-climate) and reanalysis climatology.

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• the purple boxes and whiskers indicate the seasonal forecast.
• the grey boxes and whiskers indicate the seasonal model climatology (shorter S-M-climate) derived from the re-forecasts using SEAS5 (i.e. for the period 1993-2016).
• the yellow and orange bands indicate the reanalysis climatology during the same 1993-2016 period.

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SEAS5 forecasts for October and November predict above normal precipitation in Southern Europe.  However, the SEAS5 forecast run DT 1st Oct shows a negative anomaly for that month.  Here the extended range forecast might be more appropriate to use.  The SEAS5 forecasts remain within the box and whisker symbols of both the reanalysis climatology and seasonal model climatology (shorter S-M-climate).

SEAS5 forecasts for February suggest the precipitation anomaly rises from below reanalysis mean climatology from the Aug forecast to above reanalysis mean climatology.

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