why does air sink at the poles

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why does air sink at the poles	0.96	0.4	2475	44	30
why	0.47	0.5	6806	13	3
does	1.92	0.7	2974	3	4
air	0.83	0.3	4600	89	3
sink	0.3	0.1	728	39	4
at	0.05	1	7873	34	2
the	0.02	0.6	2159	77	3
poles	0.21	0.4	244	43	5

Keyword	CPC	PCC	Volume	Score
why does air sink at the poles	0.13	0.8	5612	72
why does air subside at the poles	1.72	0.9	965	77
why does air sink	0.96	0.5	2030	2
why does the cold air sink	0.5	0.4	8624	72
why does cool air sink	1.08	0.2	9091	59
occur when air sinks down	0.39	0.7	1780	64
as air sinks is lower in pressure	1	0.2	3750	25
how does air move at the poles	1.84	0.8	6449	53
why don't planes fly over the poles	1.66	0.7	2711	19
why can't we fly over the poles	0.13	0.8	2349	74
what happens as air moves poleward	0.16	0.9	2402	83
why is it colder at the poles	0.27	0.3	4897	6
why are the poles shifting	1.72	0.2	5079	23
why are the poles colder	0.13	0.8	5483	22
why are the poles so cold	0.32	0.3	5880	27
air in the south pole is usually	0.84	0.2	8992	1
why do the poles flip	0.55	0.8	9835	51
do airplanes fly over the poles	0.49	0.2	1643	68
what happens when the poles shift	1.33	0.3	3597	99