| 内蒙古东部春季三类沙尘天气气溶胶散射系数及其与PM10、能见度相关性分析 |
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| 引用本文： | 王天舒,牛生杰.内蒙古东部春季三类沙尘天气气溶胶散射系数及其与PM10、能见度相关性分析[J].大气科学,2017,41(1):121-131. |
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| 作者姓名： | 王天舒 牛生杰 |
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| 作者单位： | 1.南京信息工程大学大气物理学院, 南京 210044 |
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| 基金项目： | 国家自然科学基金项目41375138，江苏高校优势学科建设工程PAPD |
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| 摘 要： | 利用内蒙古东胜、锡林浩特两站2004~2006年春季（3~5月）积分浊度计的观测资料，结合同期PM10质量浓度、大气能见度等资料，分析了背景、扬沙、沙尘暴、强沙尘暴等不同强度沙尘天气气溶胶散射系数的分布特征，讨论了不同强度沙尘天气过程中散射系数、PM10、能见度的日变化规律，以及不同强度沙尘天气过程中散射系数与PM10质量浓度、散射系数与能见度的相关关系。结果表明:散射系数能够很好地反映沙尘天气强度；随沙尘天气强度增强，散射系数日变化从双峰型向单峰型转变；沙尘天气强度较弱时，PM10与散射系数的日变化不相似，强沙尘暴过程中PM10与散射系数的日变化有一定的相似性；能见度与散射系数日变化趋势相反；散射系数与PM10质量浓度呈正相关性，沙尘天气越强，相关性越好，背景、扬沙、沙尘暴、强沙尘暴相关系数分别为0.201、0.809、0.898和0.953；散射系数与能见度有指数相关关系，随沙尘天气强度增强二者相关性逐渐增强，背景、扬沙、沙尘暴、强沙尘暴相关系数分别为-0.773、-0.870、-0.918和-0.940。
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| 关 键 词： | 沙尘天气强度 散射系数 PM10质量浓度 能见度 |
| 收稿时间： | 2015/10/19 0:00:00 |
Dust Aerosol Scattering Coefficient under Three Types of Sand Storm in Eastern Inner Mongolia in the Spring and Its Correlations with PM10 and Visibility |
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| WANG Tianshu and NIU Shengjie.Dust Aerosol Scattering Coefficient under Three Types of Sand Storm in Eastern Inner Mongolia in the Spring and Its Correlations with PM10 and Visibility[J].Chinese Journal of Atmospheric Sciences,2017,41(1):121-131. |
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| Authors: | WANG Tianshu and NIU Shengjie |
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| Institution: | 1.School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 2100442.Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing 210044 |
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| Abstract: | Dust aerosol scattering coefficient was measured using an integrating nephelometer deployed at the Xilinhot observatory and Dongsheng observatory in the spring (March to May) of 2004 to 2006. The mass concentration of PM10 and the visibility were also measured at the same time. We analyzed the variation features of the dust aerosol scattering coefficient in terms of atmospheric background, sand-blowing, dust storm, and strong dust storm. We discussed the diurnal variation of the dust aerosol scattering coefficient, the mass concentration of PM10 and the visibility under different intensities of sand storm. We also analyzed the correlation coefficient between the scattering coefficient and the mass concentration of PM10, and the correlation coefficient between the scattering coefficient and the visibility under different intensities of sand storm. Results show that the scattering coefficient can well reflect the intensity of sand and dust weathers. With the increase in dust storm intensity, the diurnal variation of the scattering coefficient varies from a bimodal distribution to a unimodal distribution. When the dust weather intensity is relatively weak, diurnal variations of the scattering coefficient and PM10 concentration are different. However, there exist certain similarities between their diurnal variations when a strong dust storm occurs. The diurnal variations of the scattering coefficient and the visibility are opposite to each other. There is a positive correlation between the scattering coefficient and the mass concentration of PM10, and the correlation enhances with increases in the dust weather intensity. The correlation coefficients under conditions of atmospheric background, sand-blowing, dust storm, and strong dust storm are 0.201, 0.809, 0.898, and 0.953, respectively. There is an exponential relation between the scattering coefficient and the visibility and the correlation between them enhances with increases in the dust weather intensity. Their correlation coefficients under conditions of atmospheric background, sand-blowing, dust storm, and strong dust storm are -0.773, -0.870, -0.918 and -0.940, respectively. |
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| Keywords: | Intensity of dust weather Scattering coefficient Mass concentration of PM10 Visibility |
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