Table 2. The fraction (percentage) of impacts of dust storms occurring at each dust source zone (A, B, C–D–E–F and G shown in Figure 2A) on the six study sea areas during 1997–2007.

Sea areas	Altitude 3 km				Altitude 7 km
	A	B	C–D–E–F	G	A	B	C–D–E–F	G
China seas	24	66	51	5	65	57	49	0
Sea of Japan	42	71	74	75	67	84	78	75
subarctic North Pacific	48	84	77	85	62	88	83	85
North Pacific subtropical gyre	23	61	42	15	64	52	56	40
western Equatorial Pacific	0	4	2	5	5	4	4	0
eastern Equatorial Pacific	1	0	1	5	2	0	1	0

The fraction was obtained through forward trajectory analysis from 3 km and 7 km (the altitude of the starting point in the forward trajectory analysis) above the six stations shown in Figure 2B.