Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025660 |
Hygroscopicity and cloud condensation nucleus activity of forest aerosol particles during summer in Wakayama, Japan | |
Kawana, Kaori1,2; Nakayama, Tomoki3,4; Kuba, Naomi5; Mochida, Michihiro1 | |
2017-03-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Size-resolved distributions of the hygroscopic growth factor (g) and the ratios of cloud condensation nuclei (CCN) to condensation nuclei were observed at a forest site during summer in Japan. The g distributions at 85% relative humidity were unimodal. During 0900-2100 Japan Standard Time (JST) on new particle formation (NPF) event days, less hygroscopic particles (g similar to 1.1) were dominant in the Aitken-mode range and the CCN activation diameters of the aerosols were large. These results are explained by the substantial contribution from newly formed biogenic secondary organic aerosol (BSOA). Hygroscopicity parameter kappa for newly formed Aitken particles, calculated from g and CCN activation diameters, were 0.12 and 0.16, respectively, which were estimated to be the kappa of organics. The kappa values of particles were higher during 2100-0900 JST on NPF event days, in which the aerosols were characterized by the dominance of large and more hygroscopic particles. The number fractions of CCN that were predicted from time-and size-resolved g at 0.23% and 0.41% supersaturations better matched the measured values compared to the cases with the time-averaged g and/or g for the bulk composition, which suggests that the differences in particle hygroscopicity with time and size are important to CCN activation. A cloud parcel model indicates that the contributions from less hygroscopic particles to the number concentrations of CCN and cloud droplets were potentially large during NPF event days, which suggests a marked contribution from locally formed BSOA particles alongside particles from background air. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398064200029 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; BOREAL FOREST ; CCN ACTIVITY ; CHEMICAL-COMPOSITION ; ATMOSPHERIC AEROSOL ; RAIN-FOREST ; DROPLET ACTIVATION ; SURFACE-TENSION ; URBAN AEROSOL ; SIZE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33740 |
专题 | 气候变化 |
作者单位 | 1.Nagoya Univ, Grad Sch Environm Studies, Dept Earth & Environm Sci, Nagoya, Aichi 4648601, Japan; 2.Univ Tokyo, Grad Sch Arts & Sci, Dept Basic Sci, Tokyo 1138654, Japan; 3.Nagoya Univ, Solar Terrestrial Environm, Nagoya, Aichi 4648601, Japan; 4.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan; 5.Univ Tokyo, Atmosphere & Ocean Res Inst, Kashiwa, Chiba, Japan |
推荐引用方式 GB/T 7714 | Kawana, Kaori,Nakayama, Tomoki,Kuba, Naomi,et al. Hygroscopicity and cloud condensation nucleus activity of forest aerosol particles during summer in Wakayama, Japan[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(5). |
APA | Kawana, Kaori,Nakayama, Tomoki,Kuba, Naomi,&Mochida, Michihiro.(2017).Hygroscopicity and cloud condensation nucleus activity of forest aerosol particles during summer in Wakayama, Japan.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(5). |
MLA | Kawana, Kaori,et al."Hygroscopicity and cloud condensation nucleus activity of forest aerosol particles during summer in Wakayama, Japan".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.5(2017). |
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