Temperature and Pressure

[vicleecy]

Hi flyboys,

I understand the relationship between Pressure, Density, and Height.
But sometimes I may have some funny questions in mind.

Temp high-->Density low-->Pressure low
Temp low-->Density high-->Pressure high
Alt high----> Density low-->Pressure low
Alt low----> Density high-->Pressure high

Let's look at
Temp high-->Density low
Alt High----->Density low

BUT
Alt High-->Temp low, the pressure is low according to above. Alt High-->Density Low, didn't we just say cold temp brings out higher density?? Also, what about Temp low-->Pressure high?? Sometimes I got confused here. Can anyone explain this? Is there anything relating to tropopause?


For instance today;s weather is 15'C and pressure is 1013, can we say it will always be 1013 at 15'C and then draw a temp-pressure graph? Say 20'C for 1000, 30'C for 950, just for example. Of course we know it isn't correct, so what other factors are affecting the temp-pressure relationship?

I understand it can be -10'C in US right now but also -10'C at high altitude.

Getting confused..