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首页> 外文期刊>Aerosol and Air Quality Research >Radiative Effects and Optical Properties of Aerosol during Two Dust Events in 2013 over Zanjan, Iran
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Radiative Effects and Optical Properties of Aerosol during Two Dust Events in 2013 over Zanjan, Iran

机译:伊朗赞詹2013年两次沙尘事件期间气溶胶的辐射效应和光学性质

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摘要

Aerosol optical propertieslike Aerosol Optical Depth (AOD), Angstrom Exponent (AE), ASYmmetry parameter(ASY), Single Scattering Albedo (SSA), and Aerosol Volume Size Distribution(AVSD) have been analyzed for the atmosphere of Zanjan, a city in NorthwestIran. These properties have been studied usingthe ground-based AErosol RObotic NETwork (AERONET)duringthe periods from 8 to18 May and 8 to 14 June, 2013. During thestudy period, 14th May and 10th June are identified asdusty days, and AOD at 500 nm reached a peak value of 0.64 and 0.80, on thesedays. The high values of AOD and low values of AE during dusty days illustratethat coarse mode particles like dust are dominant. In the visible spectrum ASY usually decreasesand then somewhat increases in the near infrared region. Both SSA and AVSD suggest predominance of coarseparticles on the dusty days. The Santa Barbara DISORT AtmosphericRadiative Transfer (SBDART) model is utilized to simulate the solar irradiancevalues for the above-mentioned periods at the earth's surface, within theatmosphere, and at the Top of the Atmosphere (TOA). The results show thatdominant aerosol types are dust particles which have a coolingeffect on the earth's surfaceduring the studyperiods, especially on two dusty days, 14 May, and10 June. The correlation coefficient shows a very good agreement between theARF values retrieved from AERONET and SBDART simulation results.
机译:分析了伊朗西北部城市赞詹的大气,如气溶胶光学深度(AOD),埃指数(AE),ASYmmetry参数(ASY),单散射反照率(SSA)和气溶胶体积大小分布(AVSD)等气溶胶光学特性。 。在2013年5月8日至18日和6月8日至14日期间,使用地面AErosol机器人网络(AERONET)对这些性质进行了研究。在研究期间,确定5月14日和6月10日为勤忙日,并且500 nm的AOD达到了这些天的峰值分别为0.64和0.80。在尘土飞扬的日子,AOD的高值和AE的低值说明,像粉尘这样的粗模式颗粒是主要的。在可见光谱中,ASY通常会降低,然后在近红外区域有所增加。 SSA和AVSD均表明在尘土飞扬的日子中,粗颗粒占主导地位。圣塔芭芭拉DISORT大气辐射传输(SBDART)模型用于模拟上述时段在地球表面,大气层内和大气层顶部(TOA)的太阳辐照度值。结果表明,主要的气溶胶类型是尘埃颗粒,在研究期间,特别是在5月14日和6月10日这两个尘土飞扬的日子,尘埃颗粒会对地球表面产生冷却作用。相关系数表明从AERONET检索到的ARF值与SBDART仿真结果之间有很好的一致性。

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