WRF Modelling Aim: 18 th -19 th April Cyclone taking dust SW as opposed to SE 15 th – 16 th North Scotland hit Cyclone has moved north dragging dust into the Atlantic Follow the dust track and predict landfall How am I going to do this? Create plots showing sea level pressure, surface air temperature and horizontal wind vectors to show the situation at the time Create plots showing trajectories at different height levels Compare both of these to satellite images to check accuracy
WRF pre-processing Namelist.wps Start date: 00:00 18 th April 2010 to 00:00 20 th April 2010 Model output every 6 hours Domains = 2 Outer domain - 100X100 grid points, each grid point =15km Inner domain - 100X100 grid points, each grid point =5km (parent grid ratio =3) Inner domain - 44i and 18j start in domain 1 Reference point – In outer domain, 40i and 53.3j point is lat lon (61.0, -11.0) Crib sheet: Linked Vtable and grib files to namelist.wps Ungribbed the files and ran them with metgrid.exe Ran real.exe to set up boundaries Ran./run_wrf to get wrf.out
RIP4 Crib sheet: Export – told computer where to look for RIP4 associates Moved output files from WRFV3 to RIP4 directory Ran RIP4 to prep the data files for the model run Output Ran./rip to make the plots for domain 1 and 2 Converted files to pdf
DOMAIN 1: Satellite image 19/4 at 13:00 and model output for same time
DOMAIN 2: Satellite image 19/4 at 13:00 and model output for same time
Trajectories Rip_traj.in – changed related parameters to match namelist.wps such as: Ptimes= 0-48 hours Ptimesunits=h xjtraj=12 yjtraj=75 (location in my domain of the volcano - start place for the trajectories) zktraj=1.0 to 4.5 in intervals of 0.5km (heights of trajectories) For consistency, xjtraj and yitraj had 8 values, as there was 8 heights of zktraj. Rip_traj_1.in matches rip_traj_2.in Crib Sheet The produced plots using./rip and converted them to pdf
Plots Trajectory 6 = 3.5km up Model predicts dust will hit North Scotland at 0100UTC on 19/4/2010