碩士 / 國立臺灣海洋大學 / 海洋環境資訊系 / 102 / The study site is Pengjiayu, in south of the East China Sea (longitude 122 degrees 4 minutes 17 seconds and north latitude 25 degrees 37 minutes 46 seconds). Categorize the collected atmospheric aerosols into fine and coarse particles (particle size 2.5~10μm in the definition of coarse particles, particle size less than 2.5μm is defined as fine particles), and extract the water-soluble nitrogen species out of them(WSIN;NH4+, NO3- , NO2- and WSON). The study analyzed particle size ratio and concentration variation in seasonal nitrogen species. And it will be supplemented by air mass back trajectory determining the source of each nitrogen species. 168 samples were collected from Septrmber 2012 to August 2013.
The results shows that the concentration of nitrogen species revealed seasonal variation. The concentration in spring, fall and winter, which are affected more by northeast monsoon, is higher than in summer, which is affected more by southwest monsoon. According to the air mass back trajectory, the concentration of nitrogen species in continental and regional sources is higher than it in marine sources.
Ammonium concentration is higher than nitrate concentration in the inorganic nitrogen species, which shows that inorganic nitrogen species are ammonium basic. Therefore, the concentration variation of inorganic nitrogen is similar to it of ammonium.
After analysis, the study shows that the concentration of nitrogne species in the proportion of fine particles is more thean coarse particles. The study shows that fine particles from nitrogen species are more than coarse particles from nirtogen species.
Keyword: atmospheric aerosols , ammonium , nitrate , nirtogen species
| Identifer | oai:union.ndltd.org:TW/102NTOU5276005 |
| Date | January 2014 |
| Creators | Lai, Yen-Sue, 賴彥書 |
| Contributors | Chen, Hung-Yu, 陳宏瑜 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 93 |
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