气候变化领域集成服务门户(CCPortal): Tracer-based investigation of organic aerosols in marine atmospheres from marginal seas of China to the northwest Pacific Ocean

CCPortal

DOI	10.5194/acp-20-5055-2020
	Tracer-based investigation of organic aerosols in marine atmospheres from marginal seas of China to the northwest Pacific Ocean
	Guo T.; Guo Z.; Wang J.; Feng J.; Gao H.; Yao X.
发表日期	2020
ISSN	16807316
起始页码	5055
结束页码	5070
卷号	20 期号:8
英文摘要	We investigated the geographic distributions of organic tracers in total suspended particles over the marginal seas of China, including the Yellow and Bohai seas (YBS) and the South China Sea (SCS), and the northwest Pacific Ocean (NWPO) in spring, when Asian outflows strongly affect downwind marine atmospheres. The comparison of levoglucosan observed in this study with values from the literature showed that the concentrations of biomass burning aerosols over the NWPO increased largely in 2014. However more observations, in addition to our snapshot measurement, are need to confirm whether the large increase has occurred continuously over the last few decades. The increase led to a mean observed levoglucosan value (8:214 ngm-3) over the NWPO that was close to that over the SCS (9:6 8:6 ngm-3) and almost half of that over the YBS (21 11 ngm-3). Small geographic differences in monoterpenederived and sesquiterpene-derived secondary organic tracer concentrations were obtained among the three atmospheres, although the causes may differ. By contrast, a large difference in isoprene-derived secondary organic tracer concentrations was observed among the three atmospheres, with the sum of tracer concentrations over the SCS (4554 ngm-3) being several times and approximately 1 order of magnitude greater than that over the YBS (1516 ngm-3) and the NWPO (2:31:6 ngm-3), respectively. The geographic distribution of aromatic-derived secondary organic tracers was similar to that of isoprene-derived secondary organic tracers, with a slightly narrower difference: 1:81:7, 1:11:4 and 0:30:5 ngm-3 over the SCS, the YBS and the NWPO, respectively. We discuss the causes of the distinctive geographic distributions of these tracers and present the tracerbased estimation of organic carbon. © 2020 Copernicus GmbH. All rights reserved.
关键词	aerosol biomass burning concentration (composition)geographical distribution marine atmosphere organic carbon outflow tracer Pacific Ocean Pacific Ocean (Northwest)South China Sea
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132074
推荐引用方式 GB/T 7714	Guo T.,Guo Z.,Wang J.,et al. Tracer-based investigation of organic aerosols in marine atmospheres from marginal seas of China to the northwest Pacific Ocean[J]. Atmospheric Chemistry and Physics,2020,20(8).
APA	Guo T.,Guo Z.,Wang J.,Feng J.,Gao H.,&Yao X..(2020).Tracer-based investigation of organic aerosols in marine atmospheres from marginal seas of China to the northwest Pacific Ocean.,20(8).
MLA	Guo T.,et al."Tracer-based investigation of organic aerosols in marine atmospheres from marginal seas of China to the northwest Pacific Ocean".20.8(2020).