Climate Change Data Portal
DOI | 10.5194/acp-19-5889-2019 |
Diurnal variation and size dependence of the hygroscopicity of organic aerosol at a forest site in Wakayama; Japan: Their relationship to CCN concentrations | |
Deng Y.; Yai H.; Fujinari H.; Kawana K.; Nakayama T.; Mochida M. | |
发表日期 | 2019 |
ISSN | 16807316 |
起始页码 | 5889 |
结束页码 | 5903 |
卷号 | 19期号:9 |
英文摘要 | Formation of biogenic secondary organic aerosol (BSOA) and its subsequent evolution can modify the hygroscopicity of the organic aerosol component (OA) in the forest atmosphere, and affect the concentrations of cloud condensation nuclei (CCN) there. In this study, size-resolved aerosol hygroscopic growth at 85% relative humidity and size-resolved aerosol composition were measured using a hygroscopic tandem differential mobility analyzer and an aerosol mass spectrometer, respectively, at a forest site in Wakayama, Japan, in August and September 2015. The hygroscopicity parameter of OA (κorg) presented daily minima in the afternoon hours, and it also showed an increase with the increase in particle dry diameter. The magnitudes of the diurnal variations in κorg for particles with dry diameters of 100 and 300 nm were on average 0.091 and 0.096, respectively, and the difference in κorg between particles with dry diameters of 100 and 300 nm was on average 0.056. The relative contributions of the estimated fresh BSOA and regional OA to total OA could explain 40% of the observed diurnal variations and size dependence of κorg. The hygroscopicity parameter of fresh BSOA was estimated to range from 0.089 to 0.12 for particles with dry diameters from 100 to 300 nm. Compared with the use of time- and size-resolved κorg, the use of time- and size-averaged κorg leads to under- and overestimation of the fractional contribution of OA to CCN number concentrations in the range from -5:0% to 26 %. This indicates that the diurnal variations and size dependence of κorg strongly affect the overall contribution of OA to CCN concentrations. The fractional contribution of fresh BSOA to CCN number concentrations could reach 0.28 during the period of intensive BSOA formation. The aging of the fresh BSOA, if it occurs, increases the estimated contribution of BSOA to CCN number concentrations by 52 %-84 %. © 2019 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License. |
语种 | 英语 |
scopus关键词 | aerosol; aerosol composition; cloud condensation nucleus; concentration (composition); diurnal variation; hygroscopicity; particle size; size distribution; Honshu; Japan; Kinki; Wakayama [Kinki] |
来源期刊 | Atmospheric Chemistry and Physics |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/144437 |
作者单位 | Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan; Institute of Low Temperature Science, Hokkaido University, Hokkaido, Japan; Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki, Japan |
推荐引用方式 GB/T 7714 | Deng Y.,Yai H.,Fujinari H.,et al. Diurnal variation and size dependence of the hygroscopicity of organic aerosol at a forest site in Wakayama; Japan: Their relationship to CCN concentrations[J],2019,19(9). |
APA | Deng Y.,Yai H.,Fujinari H.,Kawana K.,Nakayama T.,&Mochida M..(2019).Diurnal variation and size dependence of the hygroscopicity of organic aerosol at a forest site in Wakayama; Japan: Their relationship to CCN concentrations.Atmospheric Chemistry and Physics,19(9). |
MLA | Deng Y.,et al."Diurnal variation and size dependence of the hygroscopicity of organic aerosol at a forest site in Wakayama; Japan: Their relationship to CCN concentrations".Atmospheric Chemistry and Physics 19.9(2019). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。