The Effects of Sandstorms on the Climate of Northwestern China

Table 3

Radiation flux changes in five sandstorm processes in Lanzhou during 2009 to 2011.

Sandstorm date	Global radiation (MJ m^−2)	Clear sky date	Global radiation (MJ m^−2)	Decrease rate
09/04/2009	235	05/04/2009	322	0.27
24/04/2009	236	20/04/2009	320	0.26
19/03/2009	266	16/03/2009	277	0.04
09/04/2010	275	30/04/2010	299	0.08
29/04/2011	202	05/05/2011	318	0.36
Average	242.8		307.2	0.21