气候变化领域集成服务门户(CCPortal): Dust concentration over a semi-arid region: Parametric study and establishment of new empirical models

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DOI	10.1016/j.atmosres.2020.104995
	Dust concentration over a semi-arid region: Parametric study and establishment of new empirical models
	Najafpour N.; Afshin H.; Firoozabadi B.
发表日期	2020
ISSN	0169-8095
卷号	243
英文摘要	In recent years, the city of Tehran, Iran's capital, has encountered numerous dust events so that the dust concentration of PM10 has reached even more than 800 μg m−3. This emphasizes the importance of the statistical study of dust in Tehran and the development of correlations for estimating dust concentration of PM10. In the present study, by evaluating the data measured during dust observations over the years 2013–2016 in Tehran, new statistical models are established for estimating PM10 concentration in terms of horizontal visibility and MODIS AOD. Firstly, simple nonlinear regression models between dust concentration of PM10 and horizontal visibility as well as MODIS AOD are developed. Afterward, by combining the mentioned parameters with meteorological measurements, including wind speed, relative humidity, and temperature, multivariate nonlinear regression models are obtained. The descriptive statistical parameters and Taylor diagram concept are used in order to compare the performance of various models. Analyzing the developed models indicates that the simple model based on horizontal visibility has the best performance (R = 0.90) and considering meteorological parameters does not have a significant positive impact on the model performance. Furthermore, the estimated dust concentration of PM10 using simple models developed in this study has a better correlation with the measurements in Tehran in comparison with the results obtained by models of other researchers. This demonstrates the importance of developing such models according to the climatic and geological conditions of the investigated region. © 2020 Elsevier B.V.
关键词	Horizontal wells Radiometers Regression analysis Visibility Wind Dust concentrations Geological conditions Horizontal visibility Meteorological measurements Meteorological parameters Multivariate non-linear regression Nonlinear regression models Statistical parameters Dust aerosol composition air temperature concentration (composition)dust MODIS numerical model optical depth parameterization relative humidity semiarid region wind velocity Iran Tehran [Iran]Tehran [Tehran (PRV)]
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132432
推荐引用方式 GB/T 7714	Najafpour N.,Afshin H.,Firoozabadi B.. Dust concentration over a semi-arid region: Parametric study and establishment of new empirical models[J]. Atmospheric Research,2020,243.
APA	Najafpour N.,Afshin H.,&Firoozabadi B..(2020).Dust concentration over a semi-arid region: Parametric study and establishment of new empirical models.,243.
MLA	Najafpour N.,et al."Dust concentration over a semi-arid region: Parametric study and establishment of new empirical models".243(2020).