[논문]제주-대한해협 해역에서 에어로졸의 화학적 특성과 침적

김석현; 이현미; 문덕수

doi:10.4217/opr.2022028

제주-대한해협 해역에서 에어로졸의 화학적 특성과 침적
Chemical Characteristics and Deposition of Aerosols in the Cheju-Korea Straits 원문보기

Ocean and polar research, v.44 no.4, 2022년, pp.297 - 310

김석현 (한국해양과학기술원 해양환경.기후연구본부 해양환경연구센터) , 이현미 (한국해양과학기술원 해양환경.기후연구본부 해양환경연구센터) , 문덕수 (한국해양과학기술원 부설 선박해양플랜트연구소 해양에너지연구본부 해수에너지연구센터)

Abstract ▼ AI-Helper

To understand the chemical composition of aerosols in the Cheju-Korea Straits and their contribution to the ocean by deposition, aerosol samples were collected on board R/V Eardo from November 1997 to May 1999. The average concentrations of Al, NO3-, non-sea-salt (nss)-SO42-, and NH4+ in aerosols were 2.19, 5.59, 6.16 and 2.08 ㎍ m-3, respectively. The Al concentration in the high yellow dust period was about 100 times higher than that in the non-yellow dust period. The concentration ratio of NO3-/nss-SO42- ranged between 0.47 and 1.5, indicating that the aerosols in the Cheju-Korea Straits are under the effects of NOx and SOx emitted from China, Korea and Japan. The equivalent concentration ratio of [NH4+]/[nss-SO42-+ NO3-] with the average of 0.58±0.29 indicates that nss-SO42- and NO3- are not neutralized by NH4+. A high activity concentration of 210Pb with 1.13-1.23 mBq m-3 was observed during the high yellow dust period, indicating that 210Pb is easily adsorbed in the yellow dust originating from the continent of Asia. The distribution of 7Be and NH4+ concentrations showed a strong negative linear correlation during the low yellow dust period, April 1998. The total mineral dust flux in the Cheju-Korea Straits was estimated to be 1.21×106 tons yr-1, accounting for about 12% of the annual sediment discharge via the Nakdong River. The combined annual deposition of NH4+ and NO3- was 0.103 mole N m-2 yr-1 was estimated to support 4% of the annual primary productivity in the East China Sea.

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표/그림 (11)

표 Table 1. Sampling location, period, track and the number of aerosol samples collected on board in the Cheju-Korea Straits
그림 Fig. 1. Sampling locations of the aerosol in the Cheju-Korea Straits. The lines represent the cruise tracks of research vessel and the marks in lines identify the samples for the aerosol collected between symbols in each line: (a) Red solid line: YS9711; Black dotted line: NH9804; YS8711; Pink dashed line: YH9804, (b) Black dotted line: NH9809; Red dotted line: NH9811, (c) Black dotted line: NH9902; Red dotted line: NH9905
표 Table 2. Average concentrations and ranges of Al, NO_3^-, nss-SO₄^2-, NH₄⁺, ¹⁰Pb and ⁷Be in the aerosols of the Cheju-Korea Straits during the cruises from November 1997 to May 1999
그림 Fig. 2. Box-and-whisker plots of Al, NO₃^-, nss-SO₄^2-, NH₄⁺, ⁷Be and ²¹⁰Pb concentrations in the aerosols of the Cheju-Korea Straits during the seven cruises from November 1997 to May 1999
표 Table 3. Average concentrations of NO₃^-, NH₄^- and nss-SO₄² in the aerosols of several regions
그림 Fig. 3. Relationships between Al and NO₃^-, nss-SO₄^2-, NH₄⁺ concentrations in the aerosols of the Cheju-Korea Straits. Symbols represent +: YH9711; ○: NH9804; ●: YH9804; ◇: NH9809; △: NH9811; ×: NH9902; ▷:NH9905, respectively. In the figure of the relationship between Al and nss-SO42-, the line represents the relationship during the entire observation period
그림 Fig. 4. Relationships between nss-SO₄^2- and NH₄⁺, NO₃^- concentrations and between [nss-SO₄^2- + NO₃^-] and NH₄⁺, equlibrium concentrations in the aerosols of the Cheju-Korea Straits. The displayed numbers in the figures represent the slopes of lines. The slopes are explained in the results and discussion. Symbols represent +: YH9711; ○: NH9804; ●: YH9804; ◇: NH9809; △: NH9811; ×: NH9902; ▷:NH9905, respectively
표 Table 4. Linear correlation coefficients between component concentrations of aerosols
그림 Fig. 5. Relationships between ²¹⁰Pb and Al, nss-SO₄^2-, NH₄⁺ concentrations in the a erosols of the Cheju-Korea Straits. The displayed number in the figure represents the linear correlation coefficient between ²¹⁰Pb and NH₄⁺ concentration during the entire observation period. Symbols represent +: YH9711; ○: NH9804; ●: YH9804; ◇: NH9809; △: NH9811; ×: NH9902; ▷:NH9905, respectively
그림 Fig. 6. Relationships between ⁷Be and NO₃^-, nss-SO₄^2-, NH₄⁺ concentrations in the aerosols of the Cheju-Korea Straits. The line in the figure represents the linear correlation linear relationship between ²¹⁰Pb and NH₄⁺ concentration during the entire observation period. Symbols represent +: YH9711; ○: NH9804; ●: YH9804; ◇: NH9809; △: NH9811; ×: NH9902; ▷:NH9905, respectively
표 Table 5. Depositional flux of atmospheric chemical components in the Cheju-Korea Straits

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