Which of the following statements correctly describe the winds and air motions associated with surface high pressure systems in
the Northern Hemisphere (choose all that apply)? A clouds
B divergence of air at the surface
C divergence of air aloft
D rising air
E sinking air
F convergence of air aloft
G clear skies
H convergence of air at the surface
Low-pressure systems that cross the Northern Hemisphere usually grow, intensify, and disappear in 3 to 4 days. As they evolve, they travel a lot of kilometers and cause the fall of precipitation, being able to encompass zones as big as the center of the United States. It is more usual for them to happen, and they have more intensity during the winter season.
Usually, high-pressure systems are of two kinds: semi-permanent systems that cover the central regions of the Atlantic and Pacific Oceans, or the big systems that stand for the big domes of cool air that advance upon southern latitudes after the low-pressure systems have passed. They have the characteristics listed above.
