Page History

...

Fig8.1.8-2: An example of ecCharts vertical profile output.  Note: The diagram is output from Cy48r when the resolution of HRES (~9km) differed from the resolution of medium range ensemble (~18km) and so HRES and Ensemble Control Forecast differ.  With effect from Cy49r1, HRES and Ensemble Control Forecast (ex-HRES) are scientifically, structurally and computationally identical and their results are a single solid trace on the vertical profile.  The feint solid lines are the median value of the ensemble. The maximum dew point temperature among the ensemble members can be greater than the minimum temperature among the ensemble members.  Of course, these are not from the same ensemble member.  The breadth of the coloured regions give an indication of uncertainty.  The dew point depression range is 0C-20C to show moist environments in more detail.  

Fig8.1.8-3: Magnified portion of Fig8.1.8-2 showing the possible overlap between temperatures and dewpoints among the ensemble members.  At some levels (here 860hPa taken for illustration) some ensemble members forecast dew points are higher than the temperature forecast by other ensemble members.  The dew point depression is 0C-20C , to enable the user to see show moist environments in more detail. 

Note: The diagram is output from Cy48r when the resolution of HRES (~9km) differed from the resolution of medium range ensemble (~18km) and so HRES and Ensemble Control Forecast differ.  With effect from Cy49r1, HRES and Ensemble Control Forecast (ex-HRES) are scientifically, structurally and computationally identical and their results are a single trace on the vertical profile.

...