香港大气气溶胶组成与特征

The characteristics of chemical compositions of atmospheric aerosols in Hong Kong.

选用香港空气质量监测网中１１个监测站１９９０～１９９４年间ＴＳＰ（总悬浮粒子）和ＲＳＰ（可吸入悬浮粒子）的监测数据，分析香港大气气溶胶的化学组成与时空变化。香港大气气溶胶的浓度较低，其浓度的季节变化主要受气候变化的影响。Ｃ是大气气溶胶中最重要的化学成分，它支配着气溶胶的季节和空间变化。ＳＯ２－４、ＮＨ＋４和ＮＯ－３的浓度很低，空间分布很均匀，其季节变化主要受东亚季风控制。海洋气溶胶主要以较大的颗粒形式存在，它的来源稳定且空间分布较均匀。扬尘浓度主要受降雨和湿度的影响。Ｖ和Ｎｉ浓度的季节变化与燃料油消耗量的季节变化相同。

The chemical composition data of TSP and RSP measured at 11 stations of the Hong Kong Air Quality Monitoring Network between 1990 to 1994 are analyzed for their seasonal and spatial variations. The concentrations of atmospheric aerosols are low in Hong Kong.It is showed the seasonal variations which reflect the climate variation. C is the most important chemical component of atmospheric aerosols in Hong Kong. It dominates the seasonal and spatial variations of aerosols. The concentrations of SO 2- 4, NH + 4 and NO - 3 are very low.Theirs spatial distributions are quite even and their seasonal variations are controlled by the East Asian monsoons. Marine aerosols appear mainly in relative large particles.Its source is stable and its spatial distribution is even. The concentrations of fugitive dust are affected by precipitation and humidity. The seasonal variations of V and Ni concentrations are accordant with consumed fuel oil. Their spatial variations show the impact of the emissions from local industrial furnaces on atmospheric aerosols.