The following list shows the main Key Parameters discussed in the manual, as well as several additional parameters which might or might not be helpful. Some of the given parameters are absolutely essential for the diagnosis of a Polar Low, some supply additional information, and some are unnecessary. Only the essential parameters can be regarded as Key Parameters.

Choose the parameters you think of as Key Parameters for a Polar Low from the list below; submit your choice by clicking on the button below the list!

Height of PV = 2 units (PV)
Height Contours at 1000 hPa (H1000)
Height Contours at 500 hPa (H500)
Equivalent Thickness (Th.)
TFP (TFP)
Temperature Advection at 700 hPa (TA700)
PVA at 500 hPa (PVA500)
PVA at 300 hPa (PVA300)
Isotachs at 300 or 250 hPa (Isot)
Stability Index (Stab.)
Thetae/Thetaw at 850 hPa (Th850)
Vertical Motion (VM)
Wind Vectors (WV)
Shear Vorticity 300 hPa (SV300)
Surface winds (VV)
Temperature at 500 hPa (T500)

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