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논문 기본 정보

자료유형
학위논문
저자정보

서지환 (고려대학교, Graduate School, Korea University)

지도교수
이미혜
발행연도
2019
저작권
고려대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (3)

초록· 키워드

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The measurement of Peroxyacetyl nitrate (PAN), NO2, O3, CO, SO2, Black carbon (BC), and scattering coefficient in Research Vessel Gisang 1 was arranged in the Yellow Sea from May 2nd to June 12th, 2016 during KORUS-AQ Campaign. PAN was measured using GC-LCD (Gas Chromatography with Luminol Chemiluminescence Detection) every 2 minutes. Mean and 95th%tile concentration of PAN and O3 were 0.88 and 2.19 ppbv, and 59.3 and 90.0 ppbv, respectively. Chinese outflow with westerly wind was identified by high concentrations of PAN and CO. On the other hand, with easterly wind from the Korean peninsula, high concentrations of NO2 and O3 flow were observed. In Chinese outflows, CO increased about 435 ppbv, higher than that of Korean outflow (98 ppbv). In contrast, increases in O3 and NO2 in Korean outflow were 71 and 29 ppbv, higher than those of Chinese outflow (35 and 5 ppbv), indicating the impacts of nearby west coast of Korean peninsula. When RV Gisang1 captured ship emission impacted air, O3 dropped with a sharp increase of NO2, BC, and SO2 up to their 90-percentile concentrations (27.5 ppbv, 5.74 μg/m3, and 6.21 ppbv). PAN concentration also increased by 1.68 ppbv in average. O3/PAN slope was 4.7 in typical Chinese outflow, lower than that of Korean outflow (14). In ship emission impacted air when BC was the highest, O3/PAN was -11.5, resulting in decoupling of O3 and PAN. Therefore, the enhancement of PAN in the Yellow Sea may suggest that PAN as a tracer distinguishes the various plumes such as aerosols, O3, and ship emission.

목차

1. Introduction 1
2. Experimental 3
2.1. Site description 3
2.2. Experimental methods 3
3. Results 5
3.1. Annual variations of the Yellow Sea 5
3.2. Geographical distributions of trace gases and aerosols 6
3.3. Comparison with other KORUS-AQ campaign measurement sites 7
4. Discussion 9
4.1. Measurement species distribution 9
4.2. Chemical characteristics of airmass in the Yellow Sea 10
4.3. Ship emission impacted air 13
4.3.1. Signature of ship emission impacted air 13
4.3.2. Enhancement of PAN 13
4.4 PAN enhancement indicating secondary aerosol formation 14
5. Conclusion 16
References 34
Appendix 36

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