Based on the data of CE-318 sunphotometer at Tianjin boundary layer station from 2013 to 2014, the distribution characteristics of aerosol optical depth and Ångström exponent were analyzed. The results showed that, the average value of the aerosol optical depth (AOD) under 440nm and 500nm spectral band were 0.99±0.34 and 0.87±0.30, respectively. The monthly average of AOD under 500nm was highest in June 2013 the value equal to 1.41±0.79 and lowest in November 2013 the value equal to 0.49±0.92. For the reason of sand and dust weather the Ångström exponent was lowest in spring which value equal to 0.85±0.32. For the reason of high temperature weather the Ångström exponent was highest in summer which value equal to 1.16±0.29.The urban-industrial aerosol was the dominant type in Tianjin by the analysis of the distribution characteristics of Ångström exponent. By the joint effect of fine mode and coarse mode aerosol, AOD was higher than 2in spring. By the main effect of fine mode aerosol, AOD was higher than 2in summer. And hygroscopic character of aerosol made AOD increased in summer. The situation of AOD higher than 2in winter also by the effect of fine mode aerosol but the partical size was larger than summer. In the condition of haze day the AOD and Ångström exponent were higher than dust day and non-pollution day which value were 1.41±0.68 and 1.17±0.29. In the condition of dust day the AOD was 0.99±0.62 and the Ångström exponent was 0.55±0.22 which was lower than haze day and non-pollution day. In condition of non-pollution day the AOD was lower than dust day and haze day which the value was 0.53±0.46. Increasing with AOD the Ångström exponent had trend of increased at first and decreased subsequently.
刘敬乐, 姚青, 蔡子颖, 韩素芹. 基于太阳光度计的天津城区气溶胶光学特性[J]. 中国环境科学, 2017, 37(11): 4013-4021.
LIU Jing-le, YAO Qing, CAI Zi-ying, HAN Su-qin. Analysis on aerosol optical characteristics with sun photometer in Tianjin. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(11): 4013-4021.
Kaufman Y J, Fraser R S, Ferrare R A. Satellite measurements of large-scale air pollution:Methods[J]. Journal of Geophysical Research, 1990,95(D7):9895-9909.
[3]
Holben B N, Tanré D, Smirnov A, et al. An emerging ground-based aerosol climatology:aerosol optical depth from AERONET[J]. Journal of Geophysical Research, 2001,106(D11):12067-12097.
[4]
Kleidman R G, O'Neill N T, Remer L A, et al. Comparison of Moderate Resolution Imaging Spectroradiometer (MODIS) and Aerosol Robotic Network (AERONET) remote-sensing retrievals of aerosol fine mode fraction over ocean[J]. Journal of Geophysical Research, 2005,110(D22):3127-3137.
Eck T F, Holben B N, Reid J S, et al. Columnar aerosol optical properties at AERONET sites in central eastern Asia and aerosol transport to the tropical mid-Pacific[J]. Journal of Geophysical Research, 2005,110(D06202):887-908.
Che H Z, Zhang X Y, Chen H B, et al. Instrument calibration and aerosol optical depth validation of the China Aerosol Remote Sensing Network. Journal of Geophysical Research[J]. 2009, Vol.114(,D3):D3206.
Che H Z, Yang Z F, Zhang X Y, et al. Study on the aerosol optical properties and their relationship with aerosol chemical compositions over three regional background stations in China[J]. Atmospheric Environment, 2009,Vol.43:1093-1099.
Che H Z, Wang Y Q, Sun J Y, et al. Assessment of in-situ Langley calibration of CE-318sunphotometer at Mt. Waliguan observatory[J]. China. SOLA, 2011,(1):089-092.
[21]
Ångström A. The parameters of atmospheric turbidity[J]. Tellus, 1964,16:64-75.
[22]
Tanre D, Kaufman Y J, Holben B N, et al. Climatology of dust aerosol size distribution and optical properties derived from remotely sensed data in the solar spectrum[J]. Journal of Geophysical Research, 2001,106(D16):18205-18217.
[23]
Remer L A, Kaufman Y J. Interannual variation of ambient aerosol characteristics on the east coast of the United States[J]. Journal of Geophysical Research, 1999,104(D2):2223-2232.
[24]
Dubovik O, Holben B N, Eck T F, et al. Variability of absorption and optical properties of key aerosol types observed in worldwide locations[J]. Journal of the Atmospheric Sciences, 2002,59(3):590-608.
[25]
QX/T 113-2010中华人民共和国气象行业标准[S].
[26]
中国气象局.地面气象观测规范[M]. 北京:气象出版社, 2003:21-27.
[27]
Pan L, Che H Z, Geng F H, et al. Aerosol optical properties based on ground measurements over the Chinese Yangtze Delta Region[J]. Atmospheric Environment, 44(21/22):2587-2596.
Che H Z, Zhang X Y, Stephane A, et al. Aerosol optical properties and its radiative forcing over Yulin, China in 2001and 2002[J]. Advanced in Atmospheric Sciences, 2009,26(3):564-576.
Wang P, Che H Z, Zhang X C, et al. Aerosol optical properties of regional background atmosphere in Northeast China[J]. Atmospheric Environment, 2010,44(35):4404-4412.
Guo J P, Zhang X Y, Wu Y R, et al. Spatio-temporal variation trends of satellite-based aerosol optical depth in China during 1980~2008[J]. Atmospheric Environment, 2011,(45):6802-6811.
Gong S L, Zhang X Y, Zhao T L, et al. 2003. Characterization of soil dust aerosol in China and its transport and distribution during 2001 ACE-Asia:2. Model simulation and validation. Journal of Geophysical Research, 2013,108(D9):469-474.
Gobbi G P, Kaufman Y J, Koren I, et al. Classification of aerosol properties derived from AERONET direct sun data[J]. Atmospheric Chemistry and Physics, 2007,7(2):8713-8726.
[43]
Liu X G, Zhang Y H, Jung J S, et al. Research on the hygroscopic properties of aerosols by measurement and modeling during CAREBeijing-2006[J]. Journal of Geophysical Research, 2009, 114(16):4723-4734.
Li Z, Xia X, Cribb M, et al. Aerosol optical properties and their radiative effects in northern China[J]. Journal of Geophysical Research, 2007,112(D22):321-341.
[48]
Reid J S, Eck T F, Christopher S A, et al. Use of the Angstorm exponent to estimate the variability of optical and physical properties of aging smoke particles in Brazil[J]. Journal of Geophysical Research, 1999,104(D22):27473-27489.
