N. Spangehl et al.: Intercomparing the quality of recent reanalyses for offshore wind farm planning 
100 m wind of! COSMO-REAG6 @FINO1 (blue) and 
102 m wind spe of FINO1 {grey) Tor 2004-2009 
‘al 
a 
= 
=] 
A 
1 B1720 n= 51720 
nean= 9.93 mean = 10.05 
nedian = 9.6 median = 9.75 
1% = 1.43 1%= 1.32 
= 2202 99% = 22.63 
Aeibull: Weibuli: 
Shape = 2.26 Shape = 2.25 
3calke = 11.21 Scae- 11.35 
> 
z 
m 
= 
100 m wind spexi of! CERRA-Ic <PFINO1 (blue) and 
102 m wind of FINO1 {grey) Tor 2004-2003 
'hr 
= 51720 n = 51720 
nean= 523 mean=-=9%5 
Tedian = 59.6 median = 9.7 
1% = 1.43 1% 1.24 
= 2202 99% = 21.76 
Yeibull: Weibull: 
Shape = 2.26 Shape= 23 
Scale = 11.21 Scae- 11.23 
M 
SD 
> 
ID 
15 20 25 
Wind speed [m £ -'] 
100 m wind of! ERAS @FINOH (blue) and 
02 m wind speed of FINO1 {grey) Tor 2004-2003 
'e) 
= 51720 n= 51720 
nean= 9953 mean = 969 
nedian= 96 median = 943 
1% = 1.43 1% = 1.36 
7% = 2202 99% = 21.09 
Neibull: Weibuld: 
Shape = 2.26 Shape = 2.34 
Scale = 11.21 Scae = 10.4 
10 15 20 25 
wind speed [m £ -'1 
100 m wind of HoKllSim-De &FINO1 (blue) and 
102 m wind speed of FINO1 {grey) Tor 2004-2009 
*d) 
ı= 51720 n = 51720 
nean= 9.93 mean =- 9.83 
nedian = 9.6 median = 9.5 
1% = 1.43 1% = 1.27 
= 2202 99% = 22.14 
Yeibull: Weibuld: 
Shape = 2.26 Bhape = 2.22 
Scale= 11.21 Scae= 11.1 
3 
5 
2 
= 
a 
DR 
In 
15 20 Le 20 
Wind Speed Im -" 
10 
15 20 25 a0 
Wind speed [ma -" 
Figure 2. Frequency distribution of hourly wind speed at 100 m for model based products at FINO1 grid points (blue). Results are shown for 
(a) COSMO-REAG, (b) CERRA-fc, (c) ERA5 and (d) HoKliSim-De. Results obtained from FINO1 measurements at 102 m are additionally 
shown (grey). Values indicate the number of observations (mn), the average [m s7117, median [m s7117, 1st and 99th percentile value [m s711. 
Moreover, the shape parameter (dimensionless) and scale parameter [m s711 of the estimated Weibull distribution are shown. Histograms 
display absolute numbers. The time period is 2004-2009. 
Table 3. Satistical parameters of the pdf’s of hourly wind speed [m s711 at 100m for model based products at FINO1 grid cells. FINO1 
anemometer measurements at 102 m are used as reference. The time period is 2004-2009. The values correspond to the histograms shown in 
Fig. 2. 
Statistical parameters of pdf’s of hourly wind speed [m s !] at 100 m at FINO1 for different products 
Parameter Mean Median st nercentile 99th nercentile Shane Scale 
FINO1 9.93 9.60 1.43 22.02 2.26 11.21 
COSMO-REA6 10.05 9.75 1.32 22.63 2.25 11.35 
CERRA-fc 9.95 9.70 1.24 21.75 23 11.23 
ERAS 9.69 9.43 1.36 21.09 2.34 10.94 
HoKliSim-De 9.83 9.51 1.27 72.14 2,77 11.10 
attps://doi.org/10.5194/asr-20-109-2023 
Adv. Sei. Res., 20, 109-128. 2023