1 / 7

WRF Modelling

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?

eldon
Download Presentation

WRF Modelling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. WRF Modelling • Aim: • 18th -19th April 2010 - Cyclone taking dust SW as opposed to SE • 15th – 16th 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 18th April 2010 to 00:00 20th 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

More Related