1. WRF Modelling Aim:  18 th -19 th April 2010 - 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

2. 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

3. 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

4. DOMAIN 1: Satellite image 19/4 at 13:00 and model output for same time

5. DOMAIN 2: Satellite image 19/4 at 13:00 and model output for same time

6. 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

7. Plots  Trajectory 6 = 3.5km up  Model predicts dust will hit North Scotland at 0100UTC on 19/4/2010