混合喷雾器粒子的吸湿性的性质为喷雾器的遥感产品的申请是关键的在在多重规模的空气质量和气候的学习的光参数。在这研究,作者调查了喷雾器光性质作为为二个代表性的宗主国的相对湿度(RH ) 的功能:北京和香港。除了 RH 数据,集中 PM1 0 (直到在直径的 10 m 的微粒事) 和喷雾器散布扑灭系数的集中( ext ) 数据被使用。在散布扑灭效率的团之间的关系( MEE ,定义为 ext /PM10)和 RH 能被回归功能表示为 f = 1.52x + 0.29 ( r 2= 0.77 ), f = 1.42x + 1.53 ( r 2= 0.58 ), f = 1.19x + 0.65 ( r 2= 0.59 ),并且 f = 1.58x + 1.30 ( r 2= 0.61 )为春天,夏天,秋天,和冬季,分别地在北京。这里, f 代表 MEE, x 表示 1/(1-RH ) ,和决心的系数在括号被介绍。相反地在香港,相应功能是 f = 1.98x - 1.40 ( r 2= 0.55 ), f = 1.32x - 0.36 ( r 2= 0.26 ), f = 1.87x - 0.65 ( r 2= 0.64 ),并且 f = 2.39x - 1.47 ( r 2= 0.72 )分别地。为在高 RH 的香港的 MEE 价值(RH >70%) 比为北京的那些高,除了在里面夏天;这建议在香港的喷雾器是比在北京的那些更吸湿性的另外的三个季节,但是喷雾器 hygroscopicity 在在两个城市上的夏天同样高。这研究在散布扑灭系数的喷雾器上描述潮湿的效果并且提供用一些卫星的光遥感产品学习大气的可见性和地面级的空气质量的一个潜在的方法。
The hygroscopic properties of mixed aerosol particles are crucial for the application of remote sensing products of aerosol optical parameters in the study of air quality and climate at multiple scales. In this study, the authors investigated aerosol optical properties as a func tion of relative humidity (RH) for two representative me tropolises: Beijing and Hong Kong. In addition to the RH data, mass concentrations of PM10 (particulate matter up to 10 utm in diameter) and aerosol scattering extinction coefficient (aext) data were used. The relationship between the mass scattering extinction efficiency (MEE, defined as O'ext/PMl0) and RH can be expressed by regression func tions asf= 1.52x + 0.29 (re= 0.77),f= 1.42x + 1.53 (re= 0.58),f= 1.19x + 0.65 (re= 0.59), andf= 1.58x + 1.30 (re = 0.61) for spring, summer, autumn, and winter, respec tively, in Beijing. Here, f represents MEE, x represents I/(1-RH), and the coefficients of determination are pre sented in parentheses. Conversely, in Hong Kong, the corresponding functions are f= 1.98x- 1.40 (r^2= 0.55),f = 1.32x - 0.36 (r^2 = 0.26),f= 1.87x - 0.65 (r^2 = 0.64), and f= 2.39x - 1.47 (r^2 = 0.72), respectively. The MEE values for Hong Kong at high RHs (RH 〉 70%) are higher than those for Beijing, except in summer; this suggests that aerosols in Hong Kong are more hygroscopic than those in Beijing for the other three seasons, but the aerosol hy groscopicity is similarly high in summer over both cities. This study describes the effects of moisture on aerosol scattering extinction coefficients and provides a potential method of studying atmospheric visibility and ground level air quality using some of the optical remote sensing products of satellites.