利用湿烛法采集大气中的氯离子，用离子选择电极法分析采集液中的氯离子含量，获得热带海岛大气中氯离子沉降速率，并分析了距海距离及环境因素与氯离子沉降速率的相关性。结果表明：热带海岛大气中氯离子沉降速率较大，在距海距离50 m处，氯离子沉降速率为83～270 mg/（m²·d）；在冬季，距海距离150 m以内，氯离子沉降速率受海水飞溅和风速的共同影响，距海距离150 m以外，氯离子沉降速率与大气温度和相对湿度的相关性较差；在春季，距海距离150 m以内，氯离子沉降速率在100 mg/（m²·d）以下，与大气温度和相对湿度的相关性较差，距海距离200 m处，氯离子沉降速率随大气温度和相对湿度的升高而增大。

The sedimentation rate of chloride ion in atmosphere of a tropic island was achieved using wet candle method for chloride ion collection and ion selective electrode method for analyzing concentration of chloride ion in the collected liquid. The relationships of sedimentation rate of chloride ion with environmental factors and the distance from coastline were studied. The results show that the sedimentation rate of chloride ion in the atmosphere of tropical island was large, giving the values from 83 mg/(m²·d) to 270 mg/(m²·d) at 50 m distance from coastline. In winter, the sedimentation rate of chloride ion was controlled by seawater splash and wind speed within 150 m distance from coastline. The correlations between sedimentation rate of chloride ion and atmospheric temperature, relative humidity were poor outside 150 m distance from coastline. In spring, the sedimentation rate of chloride ion was lower than 100 mg/(m²·d), and it had no correlation with atmospheric temperature and relative humidity. But the sedimentation rate of chloride ion increased with the increase of atmospheric temperature and relative humidity at 200 m distance from coastline.