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For this to succeed the size of the box and its movement direction and movement rate need to be defined. Note that the picture below is only an illustrative example for the box following the track of TC Karl and the shown box in the picture does not reflect the default values set in the model.
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The track coordinates of Tropical Cyclone Karl can be obtained for instance from your Metview macros or from the US National Hurricane Center: https://www.nhc.noaa.gov/data/tcr/AL122016_Karl.pdf |
Namelist control of the perturbation box domain
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&NAMLHBOX LBOXMODIFY_CLOUD=true, ! enable cloud scheme T tendency scaling LBOXMODIFY_CONV=true, ! enable convection T tendency scaling LBOXMODIFY_RAD=true, ! enable radiation T tendency scaling ZBOXTIMESTART=0., ! box start time in hours ZBOXTIMEEND=96., ! box end time in hours ZBOXLONWEST=295.7, ! box western longitude boundary in degrees ZBOXLONEAST=305.7, ! box eastern longitude boundary in degrees ZBOXLATSOUTH=28.8, ! box southern latitude boundary in degrees ZBOXLATNORTH=38.8, ! box northern latitude boundary in degrees ZBOXPRESSTOP=20000., ! box top level pressure in Pa ZBOXPRESSBOT=90000., ! box bottom level pressure in Pa ZBOXDLONBORDER=5., ! box longitude interpolation zone width in degrees ZBOXDLATBORDER=5., ! box latitude interpolation zone width in degrees ZBOXDPRSBORDER=5000., ! box pressure interpolation zone width in Pa ZBOXDLON=-0.667, ! change in box longitude in degrees/hour ZBOXDLAT=0.333, ! change in box latitude in degrees/hour ZBOXVALUE=1.0, ! value of the scaling factor inside the box domain / |
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