摘要
作者分析了１９８７年８—９月在广州观测的硫酸盐巨粒子资料。主要结果是：（１）干直径大于２μｍ的硫酸盐巨粒子平均浓度１．２个·Ｌ－１，平均含盐量３．０μｇ·ｍ－３，其中干直径大于４μｍ的特大粒子平均为０．６个·Ｌ－１，均低于南海西沙永兴岛的结果。（２）浓度谱是典型的准单调下降型幕函数递减谱，其谱型参数与永兴岛的结果甚为接近；质量谱在单对数坐标中为较为平直的分布，表明各谱段粒子对含盐量均有贡献。（３）微量化学法的观测对象仅局限于干直径大于２μｍ的结晶态盐粒子，而不能识别亚微米粒子，也不能识到沉积在非水溶性气溶胶凹槽中的盐类以及粘附在絮状气溶胶上的盐类。
The data of giant particles of sulfate observed in Guangzhou during August and September 1987 are analyzed. The main results are:1) The average concentration of sulfate ion nuclei and the average salt content with which dried diameters are larger than 2μm are 1.2 per litre in number and 3. 0μg·m-3 respectively, and the special giant nuclei with which dried diameters are larger than 4μm is 0. 6 per litre in number. They are all much lower than the values observed in Yongxing(Xisha islands) in South China Sea.2) The spectrum type of concentration shows a quasiunimodal and exponential lapse rate,in Which the spectrum parameters are very close to that of the Yongxing island. The spectrum of mass shows a gentle distribution in single-logarithm-coordinate. Therefore all the results show that all size particles have contributed to salt content.
出处
《气象》
CSCD
北大核心
1995年第3期44-46,共3页
Meteorological Monthly
基金
国家气象局气象科学基金
关键词
硫酸盐
巨粒子
谱分布
sulfate giant particles size-distribution
