Question
--------


My question concerns when we're converting the 1000 hPa GRVT to get a 1000 hPa geopotential height tendency at 
the 
1000 hPa cyclone center. When you say to use project #9 to help calibrate this conversion--are we using our 
values 
for 1000 hPa GRV tendency in question 1 (along with geopotential heights from the maps) in order to calculate 
the 
variable 'A' in the equation we went over (GRV tendency = -A*g_0*geopotential height tendency)? Or would 'A' 
change 
depending on the event?





Answer----
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When you examine the different periods analysed in Project #9, you may find that "A" isn't a true constant even

within a single case study. You might find that "A" depends on the intensity of cyclogenesis (a function of dGRV/dt)

and, so, might find a linear relationship between "A" and dGRV/dt the most useful. You then could assume the same 

relationship for the case study of the final project. Be clear in your description of the methodology used in making 

the conversion between dGRV/dt and dZ/dt at the 1000 hPa level.