Cap 5 Pressure sys

Question 1

When a cold and warm front occur?

Answer 1

When a polar depression pushes polar cold and tropical warm air into each other.

Question 2

What are Trough lines?

Answer 2

Strong surface convergence ( line of cb very prob)

Question 3

cold core low?and how to identify?

Answer 3

Common in polare fron depression

If its a low the the line bulge down at the bottom and for the cold part the line bulge down aloft. (Pointing downwards).

Basic rules : high&raquo_space;bulge up
Low&raquo_space;bulge down

                  Warm >>>bulge up
                  Cold>>> bulge down

Question 4

Orographic low/depression?

Answer 4

Wind blowing more or less at right angle to the mountain.
Windward side: air compressed (localised high pressure)
Lee side: suction effect (low pressure)

Question 5

Cold core HIGH and warm core HIGH

Answer 5

COLD CORE HIGH: cold surface temp makes the lower troposhpere cold and dense.Pressure level bulge up at lower levels,bulge downcat high levels.

WARM CORE HIGH: excess air in the upper troposphere,warm and less dense.pressure levels bulge up at both upper and lower levels.