-pressure centre is identified here as any MSLP minimum within
a moving circular window of 1000 km radius. Contrary to using a fixed number of grid points,
the constant physical size of the test window takes into account grid-point convergence towards
higher latitudes. The identified minima are closed in the
sense that, with pressure rounded to
nearest tenth hectopascal, the minimum value is only found
/media/vedurstofan/utgafa/skyrslur/2015/VI_2015_005.pdf