[2] Gro S, Esselborn M, Abicht F, et al. Atmos. Chem. Phys., 2013, 13: 2435
[3] Liu Quan, Sun Yang, Hu Bo, et al. Chinese Science Bulletin, 2012, 57(7): 819.
[4] Li X, Brauers T, Shao M, et al. Atmos. Chem. Phys., 2010, 10: 2079.
[5] Thomas Müller, Detlef Müller, René Dubois. Applied Optics, 2006, 45(10): 2295.
[6] Halla J D, Wagner T, Beirle S, et al. Atmos. Chem. Phys., 2011, 11: 12475.
[9] Vlemmix T, Piters A J M, Stammes P, et al. Atmos. Meas. Tech., 2010, 3: 1287.
[10] Si F Q, Liu J G, Xie P H, et al. Chinese Physics, 2005, 14(11): 2360.
[12] Zieger P, Weingartner E, Henzing J, et al. Atmos. Chem. Phys., 2011, 11: 2603.