ECMWF-S4 Correlation of the ensemble mean against ERA-Interim and JRA-55

These images show maps of temporal correlation coefficients between ECMWF S4 and two reanalyses (ERA-Interim and JRA-55) for raw, bias corrected (with cross-validation) and calibrated (with cross-validation) wind speed and temperature. The images are organised in the different groups (raw wind speed, bias corrected wind speed, etc.) according to the figure structure defined below: the first and second row correspond to correlation maps of each of the four seasons over the period 1991-2012 with 1 month lead time, for ERA-Interim and JRA-55 reanalysis respectively. In the third and fourth rows, the same type of information is found over a different period (1981-2012). Note that only in the case of the raw wind speed and temperature more rows of images are included, which show the  correlation maps of the four seasons over the period 1981-2015 with 0, 1, 2, 3 and 4 months lead time for the ERA-Interim reanalysis. For more information, see Scientific Technical Notes Lee et al. (2016a) and Marcos et al. (2016a).       

Figure structure

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    Periods           Reanalysis           Lead time                 Seasons

1991-2012     |   ERA-Interim  |      lead 1     ||   MAM   |   JJA   |   SON   |   DJF   | 

                            |   JRA-55             |      lead 1     ||   MAM   |   JJA   |   SON   |   DJF   |  

1981-2012     |   ERA-Interim  |      lead 1     ||   MAM   |   JJA   |   SON   |   DJF   |  

                            |   JRA-55             |      lead 1     ||   MAM   |   JJA   |   SON   |   DJF   |  

1981-2015*   |   ERA-Interim  |      lead 0     ||   MAM   |   JJA   |   SON   |   DJF   |  

                                                           |      lead 1     ||   MAM   |   JJA   |   SON   |   DJF   |  

                                                           |      lead 2     ||   MAM   |   JJA   |   SON   |   DJF   |  

                                                           |      lead 3     ||   MAM   |   JJA   |   SON   |   DJF   |  

                                                           |      lead 4     ||   MAM   |   JJA   |   SON   |   DJF   |

* Only raw data

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