The stability of sea-spray aerosol generation and the effects of local circulation on it.

• Main Authors: Yun Lih Chang, 張雲麗
• Other Authors: Chung-Te Lee
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/26514496644284814526

碩士 === 國立中央大學 === 環境工程研究所 === 83 === This work investigated the effects of local circulation on the spread of sea-spray aerosol and the stability of its generation. Arosols from seashore and the inner-land area were collected to analyze their size distributions and the water- soluble ion contents. The proportion from each of the three parts of the composite species from water-soluble ions was further estimated in this study. The results from the field sampling of Taoyuan and Hsinchu areas showed that the modes of aerosol size spectra and the proportion of aerosol ionic species were evidently influenced by the land-sea breeze. From the calculation of enhancement factor, ionic species with sea origin could be identified. By using the scheme of "chlorine loss", the analyzed water-soluble ions were divided into three parts, i.e., sea-salt, non-sea-salt, and non-sea-salt calcium and magnesium. The percentage of sea-salt contents was found to increase with the wind speed of the sea breeze while that of the non-sea-salt compositions was increased with the decrease of the land breeze. A seashore site on the roof of a one floor building located in the Peace Island scenic area at Keelung City was chosen to sample aerosols. The results revealed that particles with the similar size spectra were characterized with the similar water-soluble ion contents. Meanwhile, by applying the enhancement factor on the collected aerosols the species originated from the sea could also be singled out.