The Wave Model - Last part Slide 1 Validation of wind & wave analysis using satellite & buoy . Altimeters onboard ERS-1/2 , ENVISAT and Jason Quality is monitored daily . Monthly collocation plots SD 0.5 0.3 m for waves (recent SI 12- 15%) SD 2.0 1.2 m/s for wind (recent SI 16- 18%) Wave Buoys (and other in-situ instruments ) Monthly collocation plots SD 0.85 0.45 m for waves (recent SI 16-20%) SD 2.6 1.2 m/s for wind (recent SI 16- 21%)
18
Embed
Slide 1The Wave Model - Last part Validation of wind & wave analysis using satellite & buoy. Altimeters onboard ERS-1/2, ENVISAT and Jason Quality is monitored.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
The Wave Model - Last part Slide 1
Validation of wind & wave analysis using satellite & buoy.
MAGICS 6.7 icarus - dax Tue Jan 11 08:59:02 2005 Verify SCOCOM * 1 ERROR(S) FOUND *
The Wave Model - Last part Slide 10
RMSE of * significant wave height, * 10m wind speed and * peak wave period of different models as compared to buoy measurements for February to April 2005
0 1 2 3 4 53rd generation fc data only, fc from 0 and 12Z for 0502 to 0504
0
0.10.20.3
0.40.50.6
0.70.80.9
1
RM
SE
(m
)
SIGNIFICANT W AVE HEIGHT ROOT MEAN SQUARE ERROR at all 69 buoys
ECMWF METOF FNMOC MSC NCEP METFR DWD
0 1 2 3 4 53rd generation fc data only, fc from 0 and 12Z for 0502 to 0504
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
RM
SE
(m
/s)
10m W IND SPEED ROOT MEAN SQUARE ERROR at all 69 buoys
ECMWF METOF FNMOC MSC NCEP METFR DWD
0 1 2 3 4 53rd generation fc data only, fc from 0 and 12Z for 0502 to 0504
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
2.7
RM
SE
(s
ec
.)
PEAK PERIOD ROOT MEAN SQUARE ERROR at all 63 non UK buoys
ECMWF METOF FNMOC MSC NCEP METFR DWD
The Wave Model - Last part Slide 11
3. Benefits for Atmospheric Modelling 3.1. Use as Diagnostic Tool
Discovered inconsistency between wind speed and stress and resolved it.
Over-activity of atmospheric model during the forecast: mean forecast error versus time.
The Wave Model - Last part Slide 12
3.2. Coupled Wind-Wave Modelling
Coupling scheme:
Impact on depression (Doyle).
Impact on climate [extra tropic].
Impact on tropical wind field ocean circulation.
Impact on weather forecasting.
ATM
WAM
t
u10
u10
t
u10
time
time
windww Skk
d,101.0
The Wave Model - Last part Slide 13
WAM – IFS Interface
A t m o s p h e r i c M o d e l
q T P
air
zi / L (U10, V10)
W a v e M o d e l
The Wave Model - Last part Slide 14
Simulated sea-level pressure for uncoupled and coupled simulations for the 60 h time
uncoupled coupled
956.4 mb 963.0 mb
Ulml > 25 m/s1000 km
The Wave Model - Last part Slide 15
Scores of FC 1000 and 500 mb geopotential for SH(28 cases in ~ December 1997)
coupleduncoupled
The Wave Model - Last part Slide 16
Standard deviation of error and systematic error of forecast wave height for Tropics
(74 cases: 16 April until 28 June 1998).
coupled
The Wave Model - Last part Slide 17
Global RMS difference between ECMWF and ERS-2 scatterometer winds
(8 June – 14 July 1998)
coupling
~20 cm/s (~10%) reduction
The Wave Model - Last part Slide 18
Change from 12 to 24 directional bins:Scores of 500 mb geopotential for NH and SH