摘要
利用2010年11月6日在珠江三角洲的佛山、江门等地区上空进行的一次飞机探测数据，初步分析气溶胶粒子的垂直和水平分布特征。结果表明，气溶胶粒子在不同的高度有较大的差异，自下而上存在着累积层、递减层和增加层，在1 033 m以下的大气边界层存在气溶胶粒子的累积，气溶胶粒子最小浓度为1 151.15/cm3，高度1 033 m；最大浓度为7 307.38/cm3，高度627 m；平均浓度5 775.63/cm3，平均直径0.212 μm，最大直径0.219 μm，最小直径0.189 μm。在1 033 m以上，气溶胶粒子浓度随高度增加而递减，但在逆温层附近气溶胶粒子的浓度出现了随高度增加而增加的现象。在江门鹤山上空3 800 m的高度层平飞时段，气溶胶粒子数浓度平均为19.74/cm3，变化范围1.97～53.65/cm3。对不同高度粒子谱分析表明，其谱型为多峰型，且高度越高，谱宽越窄，大粒子基本集中在1 000 m高度以下。
In this paper, we used data observed by aircraft over Foshan and Jiangmen in the Pearl River Delta to preliminarily analyze the vertical and horizontal distribution of aerosol particles. Results showed that the aerosol particles differ much with altitudes; they accumulate, then decrease and then increase again from bottom to top. They accumulate under the layer of 1 033 m with the minimum concentration of 1151.15/cm^3 on the height of 1 033 m. The maximum concentration was 7 307.38/cm^3 on the altitude of 699 m. The average concentration was 5 775.63/cm^3, average diameter was 0.212 μm, the largest diameter was 0.219 Bm and the minimum diameter was 0.189 μm. At the height of 1 033 m and above, their concentration generally decreases with height, but near the inversion layer it increases with height. When aircraft flied on the level of 3 800 m over Heshan of Jiangmen, the average concentration of aerosol particles was found to be 19.74/cm^3 and changed in a range of 1.97-53.6 5/cm^3. Analysis of particle spectrum shows that their spectrum is of multiple peaks, and the larger the height, narrower the spectral width, and large particles are concentrated at the height of less than 1 000 m.
出处
《热带气象学报》
CSCD
北大核心
2015年第1期71-77,共7页
Journal of Tropical Meteorology
基金
国家重点基础研究发展计划(973)项目(2011CB403403)
广东省气象局科研项目(2013E17)共同资助
关键词
珠江三角洲
大气气溶胶
分布特征
飞机观测
Pearl River Delta
atmospheric aerosol
distribution characteristics
aircraft observation
