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The classification of cloud and aerosol by means of multi-axis differential optical absorption spectroscopy (MAX-DOAS) is studied in this paper. Firstly, the characters of variation of color index (CI), radiance, and O4 air mass factor (AMF) are analyzed in the following kinds of weather cases, i.e. clear and low aerosol load, clear and high aerosol load, broken cloud, continuous and thin cloud as well as continuous and thick clouds. We found that the CI consecutively decreases with the growing up of optical depth of cloud and aerosol. And the speedy temporal variation of CI is always going along with the occurrence of broken cloud. For the case of continuous cloud, the CIs of observations for all the elevation angles are similar to each other. At the same time, the thick cloud case normally causes radiance dropping and O4 AMF growing up strongly. Based on these characters, the scheme of cloud classification for MAX-DOAS is built. Using this scheme, the classification results for the MAX-DOAS observations in the period from 1 June 2012 to 30 October 2012 are analyzed statistically. The occurrence probabilities of the broken cloud and thin continuous cloud are the two largest weather kinds. The percentage of the broken cloud in all the observations is 66%, and that of the thin continuous cloud case is 14.3%. For these two kinds of weathers, the mean NO2 tropospheric vertical column densities (VCD) are respectively 35% and 66% larger than the value for the clear and low aerosol. Meanwhile, the standard deviation, which represents the stability of the measured NO2 VCD is two times larger than that of the clear and low aerosol cases. In the weather of thick continuous cloud, suddenly appearing of peak and valley are often observed. In conclusion, the real time classification of cloud and aerosol is very important and valuable in analyzing of MAX-DOAS data and the guarantee of data quality.
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Keywords:
- multi-axis differential optical absorption spectroscopy /
- classification of cloud and aerosol /
- color index /
- O4 air mass factor
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[2] Hnninger G, von Friedeburg C, Platt U 2004 Atmos. Chem. Phys 4 231
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[12] Wang Y, Li A, Xie P H, Chen H, Mou F S, Xu J, Wu F C, Zeng Y, Liu J G, Liu W Q 2013 Acta Phys. Sin. 62 200705 (in Chinese)[王杨, 李昂, 谢品华, 陈浩, 牟福生, 徐晋, 吴丰成, 曾议, 刘建国, 刘文清 2013 62 200705]
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[30] Wu F C, Xie P H, Li A, Si F Q, Xu j, Fan G Q, Liu W Q, Liu W Q 2013 Acta Opt. Sin. 33 0601002 (in Chinese) [吴丰成, 谢品华, 李昂, 司福祺, 徐晋, 范广强, 刘建国, 刘文清 2013 光学学报 33 0601002]
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[59] Bogumil K, Orphal J, Homann T, Voigt S, Spietz P, Fleischmann O C, Vogel A, Hart-mann M, Bovensmann H, Frerik J, Burrows J P 2003 J. Photoch. Pho-tobio. A 157 167
[60] [61] [62] https://nsidc.org/data/modis/terra_aqua_differences/[2013-12-08]
[63] [64] [65] [66] Deutschmanna T, Beirle S, Frie U, Grzegorski M, Kern C, Kritten L, Platt U, Prados-Romna C, Pukite J, Wagner T, Werner B, Pfeilsticker K 2011 Journal of Quantitative Spectroscopy and Radiative Transfer 112 1119
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[1] Zhu X L, Zhang Y H, Zeng L M, Wang W 2005 Research of Environmental Sciences 18 1 (in Chinese) [朱先磊, 张远航, 曾立民, 王玮 2005 环境科学研究 18 1]
[2] Hnninger G, von Friedeburg C, Platt U 2004 Atmos. Chem. Phys 4 231
[3] [4] [5] Li A, Xie P H, Liu C, Liu J G, Liu W Q 2007 Chin. Phys. Lett. 24 2859
[6] Wang Y, Xie P H, Li A, Zeng Y, Xu J, Si F Q 2012 Acta Phys. Sin. 61 114209 (in Chinese)[王杨, 谢品华, 李昂, 曾议, 徐晋, 司福祺 2012 61 114209]
[7] [8] Wang Y, Li A, Xie P H, Zeng Y, Wang R B, Chen H, Pei X, Liu J G, Liu W Q 2012 Chin. Phys. B 21 114211
[9] [10] [11] Xu J, Xie P H, Si F Q, Dou K, Li A, Liu Y, Liu W Q 2010 Spectroscopy and Spectral Analysis 30 2464 (in Chinese) [徐晋, 谢品华, 司福祺, 窦科, 李昂, 刘宇, 刘文清 2010 光谱学与光谱分析 30 2464]
[12] Wang Y, Li A, Xie P H, Chen H, Mou F S, Xu J, Wu F C, Zeng Y, Liu J G, Liu W Q 2013 Acta Phys. Sin. 62 200705 (in Chinese)[王杨, 李昂, 谢品华, 陈浩, 牟福生, 徐晋, 吴丰成, 曾议, 刘建国, 刘文清 2013 62 200705]
[13] [14] Wang Y, Xie P H, Li A, Si F Q, Zeng Y, Wu F C 2012 Acta Opt. Sin. 32 0901002 (in Chinese) [王杨, 谢品华, 李昂, 司福祺, 曾议, 吴丰成 2011 光学学报 32 0901002]
[15] [16] [17] Gielen C, Van Roozendael M, Hendrik F, Fayt C, Hermans C, Pinardi G, Vlemmix T 2013 Geophysical Research Abstracts 15 EGU 2013-7153-1
[18] [19] Wu F C, Xie P H, Li A, Si F Q, Wang Y, Liu W Q 2011 Acta Opt. Sin. 31 1101003 (in Chinese) [吴丰成, 谢品华, 李昂, 司福祺, 王杨, 刘文清 2011 光学学报 31 1101003]
[20] [21] Ma J Z, Beirle S, Jin J L 2012 Atmos. Chem. Phys. Discuss. 12 26719
[22] Wagner T, Dix B, Friedeburg C v 2004 J. Geophys. Res. 109 22205
[23] [24] [25] Wagner T, Deutschmann T, Platt U 2009 Atmos. Meas. Tech. 2 495
[26] Wang Y, Li A, Xie P H, Chen H, Xu J, Wu F C, Liu J G, Liu W Q 2013 Acta Phys. Sin. 62 180705 (in Chinese)[王杨, 李昂, 谢品华, 陈浩, 徐晋, 吴丰成, 刘建国, 刘文清 2013 62 180705]
[27] [28] [29] Wagner T, Beirle S, Brauers T 2011 Atmos. Meas. Tech. Discuss. 4 3891
[30] Wu F C, Xie P H, Li A, Si F Q, Xu j, Fan G Q, Liu W Q, Liu W Q 2013 Acta Opt. Sin. 33 0601002 (in Chinese) [吴丰成, 谢品华, 李昂, 司福祺, 徐晋, 范广强, 刘建国, 刘文清 2013 光学学报 33 0601002]
[31] [32] [33] Wagner T, Erie F, Marquard L, Otten C, Pfeilsticker K, Senne T, Stutz J, Platt U 1998 J. Geophys. Res. 103 25307
[34] [35] Huang X Y, Xia J R, Pu L B, Zhang X F, Lei Y, Huang J S, Wang W W, Wu D, Jiang C H, Hu H F 2013 Chinese Journal of Quantum Electronics 30 73 (in Chinese) [黄兴友, 夏俊荣, 卜令兵, 张雪芬, 雷勇, 黄建松, 王巍巍, 吴迪, 蒋昌华, 胡汉峰 2013 量子电子学报 30 73]
[36] Heinle A, Macke A, Srivastav A 2010 Atmos. Meas. Tech. 3 557
[37] [38] [39] Pei X, Li A, Xie P H, Wu F C, Wang Y, Xu J 2013 Journal of Atmospheric and Environmental Optics 8 354 (in Chinese)[裴显, 李昂, 谢品华, 吴丰成, 王杨, 徐晋 2013 大气与环境光学学报 8 354]
[40] [41] [42] Wagner T, Beirle S, Drner S, Friess U, Remmers J, Shaiganfar R 2013 Atmos. Meas. Tech. Discuss. 6 10297
[43] [44] Wagner T, Beirle S, Deutschmann T 2009 Atmos. Meas. Tech. 2 113
[45] Platt U, Stutz J 2008 Differential Optical Absorption Spectroscopy. Berlin: Springer-Verlag Heidelberg p133
[46] [47] [48] Greenblatt G D, Orlando J J, Burkholder J B 1990 J. Geophys. Res. 95 18577
[49] [50] Wagner T, Friedeburg C von, Wenig M 2002 J. Geophys. Res. 107 D 204424
[51] [52] [53] Solomon S, Schmeltekopf A L, Sanders R W 1987 J. Geophys. Res. 92 8311
[54] [55] [56] Greenblatt G D, Orlando J J, Burkholder J B, Ravis-hankara A R 1990 J. Geophys. Res. 95 18577
[57] [58] Vandaele A C, Hermans C, Simon P C, Carleer M, Colins R, Fally S, Merienne M F, Jenouvrier A, Coquart B 1998 J. Quant. Spectrosc. Radiat. Transfer 59 171
[59] Bogumil K, Orphal J, Homann T, Voigt S, Spietz P, Fleischmann O C, Vogel A, Hart-mann M, Bovensmann H, Frerik J, Burrows J P 2003 J. Photoch. Pho-tobio. A 157 167
[60] [61] [62] https://nsidc.org/data/modis/terra_aqua_differences/[2013-12-08]
[63] [64] [65] [66] Deutschmanna T, Beirle S, Frie U, Grzegorski M, Kern C, Kritten L, Platt U, Prados-Romna C, Pukite J, Wagner T, Werner B, Pfeilsticker K 2011 Journal of Quantitative Spectroscopy and Radiative Transfer 112 1119
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