Session of the wmo-ioc joint Technical Commission for Oceanography and Marine Meteorology (jcomm) agreed that it would be logical to transform the wmo wave Programme into the jcomm wind Wave and Storm Surge Programme



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External Forcing

Most of the applications are forced by tides at the open boundaries. Surge estimation at the boundary is used for 2 D, while seasonal conditions are reported for 3 D models. Information on the storm intensity, track and landfall is provided to tropical cyclone applications. Forcing winds used belong mostly to high-resolution national NWP and / or hurricane predictions. No corrections made to predicted winds are reported (Table 9.4).


Table 9.4: External forcing provided to operational / pre-operational applications.


Wind

Open Boundaries

Country




source

update

spatial resolution

Surge

Tides







INM (HIRLAM)

twice daily

input every 3 hs



0.2 deg

Inverse barometer

MOG2D model

Spain




DMI Hirlam

6 hours,

hourly input



5 km

air press., atmospheric effects

north bound: obeskommando der kiriegsamrine (Germany, 1943)

10 constituents.

southern bound: Admiralty Tsales, 4 const. south bound.


Denmark




MSC

U.S. Navy COAMPS



input every 3 hour

daily


daily 48 hour forecasts, 6 hourly

24km x 24 km, aprox.

fixed seasonal conditions

Radiation



tide model

Topex altimeter inverse model




Canada













Radiation,

zero flow normal to sea-land interface



harmonic analysis of tide gauge data

Japan




KMA mesoscale model

(MM5)


input every 3 hour

daily


daily 48 hour forecasts, 12 hourly

30km x 30km,

approx.


air press., atmospheric effects

Tide model

&

harmonic analysis of tide gauge data



Korea




ECMWF 10 m wind




1؛ lat./lon.







Portugal




NCEP gfs

(analyses)


SMN (NWS Arg.) eta model

(forecasts)



6 hourly

3 hourly


0.47؛ lat/lon aprox.
1/3 ؛ lat/lon



Schiwdersky atlases, 5 constituents opensea

Kelvin wave interpolation from stations at mouth of estuary



Argentina




DWD (German Weather Service): global GME

local LM(Europe)



twice daily, 00Z 12 Z

40 km aprox.

7 km aprox.



circulation: two-way nesting, monthly climatological temp. and salinity inflow through buffer layer

Circulation and surge: radiation, surge from NE Atlantic model




North Sea_ 14 const.



Germany




ECMWF global

120 hs. every 6 hours

1.5؛ lat/lon

closed boundaries (coarse)

nesting






Kazakhstan




HIRLAM

every hour

22 km




calculated tidal comp.

Sweden




HIRLAM (NL-KNMI)

update 6 hours

1 hour


0.2 deg.




10 tidal comp. tuned from ocean models

Netherlands




IFS

ARPEGE


ALADIN

6 hour

3 hour


3 hour

0.5 deg

0.25 deg.

0.1 deg..


inverted barometric

radiation for current

normal zero at coastline


Tide components from past observations

France




-

-

-

tropical cyclone track, size and intensity

predicted astronomical tides

Hong Kong, China




LAAM limited area atmospheric model

twice daily, input every 6 hour

75 km

river run-off

ice conditions






Russia




objective analyses of synoptic observations







Press. drop

radius of max. wind

max.wind speed

forecast landfall

Motion of the storm


-

India




UK mesocale model







inverse barometer

larger scale model

U.K.






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