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Dynamical Tropopause Maps (fields interpolated to PV = 2 PVU):
(1) Potential temperature
(2) Wind speed
(3) Geopotential height
(4) Meridional wind

All panels also show contours of:
Instantaneous jet axes identified from maxima in wind speed on the 2 PVU surface


ECMWF Operational Analyses
Data is transformed to an F320 linear full Gaussian grid (longitude spacing 0.28125 deg)

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