The Distribution Feature of Giant Particles of Sulfate in Guangzhou during Summer

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.

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