WRF modelling of Flight B989 20th Oct 2016 WRF initialised with 0.5 degree NCEP GFS analyses 33 tracers added (see below) Simulation start (and tracer release): 06Z 20th Oct. Simulation end time: 0Z 21st Oct. 400 m resolution, 50 vertical levels. Underlying orography is USGS 30 arc-second. [SRTM or equivalent??] Run on ARCHER 512 processors ~ real time

Tracer locations All (?) 33 volcanoes (active and dormant) in Iceland, from Evgenia:

Actual WRF domain Orography contours every 50 m Volcanoes 1-33 (Evgenia’s numbering system)

Results Output is every 30 mins (can change to any desired frequency (subject to disk space…) Plots on the following levels: 30 m, 95 m, 186 m, 303 m, 450 m, 1094 m (can change) CURRENTLY plots are for tracer concentration at levels above ground level (can change)

Results contd. Concentrations are arbitrary and all plots are normalised so that the highest concentration in EACH plot is 1 arbitrary unit N.B. plots for 06Z show no tracer as this is the “moment” of tracer release.

14Z 10 m wind vectors, skip: 1

14Z 10 m wind vectors, skip:0

14Z 10 m wind streamlines

KEFLAVIK AIRPORT 20th OCT 2016

14Z Direction ~ 175° 16Z Direction ~ 165°

tr_15, 14Z

Results for 08Z, 10Z, 12Z, 14Z, 16Z are online (1230 plots!) http://homepages.see.leeds.ac.uk/~lecrrb/Iceland_tracer/b989/ and subdirectories. Filenames e.g. trac_all_0030_2016-10-20_06:00:00 all volcanoes level (m AGL) date time (GMT) i.e. summation trac_01_0030_2016-10-20_06:00:00 volcano number 01

Next? Extract concentration along flight path (all ; Katla ; …?) This is quite a time-consuming interpolation… Suggestions for times / Runs welcome