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Begin by entering the folder labelled 'Analysis':
Task
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1: Mean-sea-level pressure and track
This task will look at the synoptic development of Hurricane Nadine and the cutoff low up to 00Z, 20th September 2012. The forecasts in the next exercises start from this time and date.
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TODO:
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an_1x1.mv : this plots horizontal maps of parameters from the ECMWF analyses overlaid on one plot. an_2x2.mv : this plots horizontal maps of parameters from the ECMWF analyses four plots to a page (two by two). TODO: check macros have not changed |
Right-click on the 'an_1x1.mv' icon and select the 'Visualise' menu item (see figure)
After a pause, this will generate a map showing mean-sea-level pressure (MSLP).
Drag and drop the mv_track.mv icon onto the map to add the track of Hurricane Nadine.
In the plot window, use the play button in the animation controls 
to animate the map and follow the development and track of Hurricane Nadine.
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Right-click the mouse button on the 'an_1x1.mv' icon and select the 'Edit' menu item.
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The surface fields (single level) are: mslp (mean-sea-level-pressure), t2 (2-metre temperature), wind10 (10-metre wind arrows), speed10 (wind-speed at 10m : sqrt(u^2+v^2)), sst (sea-surface temperature).
The upper level fields are: t (temperature), z (geopotential), pt (potential temperature), eqpt (equivalent potential temperature), wind (wind arrows), speed (wind-speed as contours), r (relative humidity).
These The upper level fields have a list of available pressure levels in square brackets.
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With the edit window open for an_1x1.mv, find the line that defines 'plot1':
Change this line to:
The '.s' means plot the 500hPa geopotential as a shaded plot instead of using contours (this style is not available for all fields). Make sure ' Click the play button and then animate the map that appears |
Use the an_1x1.mv (or the an_2x2.mv) to plot fields of your choice and compare with the satellite images.
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Change the value of
You might add the mslp or z500 fields to this plot e.g.
Note that the fields are plotted in the order specified in the list! |
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Task 3: Changing the map geographical area
Right-click on 'an_1x1.mv' icon and select 'Edit'.
In the edit window that appears
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Task 4: Wind fields, sea-surface temperature (SST)
The 'an_2x2.mv' icon plots up to 4 separate figures on a single frame.
Right-click on the 'an_2x2.mv' icon and select the 'Edit' menu item.
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Exercise 1 looked at the synoptic development up to the 20-Sept-2012. This exercise looks at the ECMWF HRES forecast from this date and how the IFS model developed the interaction between Hurricane Nadine and the cut-off low.
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