The Effects of Sandstorms on the Climate of Northwestern China

Table 2

The frequency of sandstorm at the five provincial capital cities in NWC from 2004 to 2012 (day a⁻¹).

City	Total days	Days in March	Days in April	Days in May	Days in June
Xian	6.0	0.7	0.7	0.5	0.0
Lanzhou	7.6	2.8	2.7	1.4	0.2
Xining	1.5	0.3	1.0	0.0	0.0
Yinchuan	21.9	3.3	3.9	1.8	0.2
Urumchi	1.4	0.0	0.8	0.2	0.0