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