Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-15483-2019 |
Estimating cloud condensation nuclei number concentrations using aerosol optical properties: role of particle number size distribution and parameterization | |
Shen, Yicheng1,2; Virkkula, Aki1,2,3; Ding, Aijun1; Luoma, Krista2; Keskinen, Helmi2,4; Aalto, Pasi P.2; Chi, Xuguang1; Qi, Ximeng1; Nie, Wei1; Huang, Xin1; Petaja, Tuukka1,2; Kulmala, Markku2; Kerminen, Veli-Matti2 | |
2019-12-19 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:24页码:15483-15502 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Finland |
英文摘要 | The concentration of cloud condensation nuclei (CCN) is an essential parameter affecting aerosol-cloud interactions within warm clouds. Long-term CCN number concentration (N-CCN) data are scarce; there are a lot more data on aerosol optical properties (AOPs). It is therefore valuable to derive parameterizations for estimating N-CCN from AOP measurements. Such parameterizations have already been made, and in the present work a new parameterization is presented. The relationships between N-CCN, AOPs, and size distributions were investigated based on in situ measurement data from six stations in very different environments around the world. The relationships were used for deriving a parameterization that depends on the scattering Angstrom exponent (SAE), backscatter fraction (BSF), and total scattering coefficient (sigma(sp)) of PM10 particles. The analysis first showed that the dependence of N-CCN on supersaturation (SS) can be described by a logarithmic fit in the range SS < 1 :1 %, without any theoretical reasoning. The relationship between N-CCN and AOPs was parameterized as N-CCN approximate to ((286 +/- 46)SAE ln(SS/(0.093 +/- 0.006))(BSF - BSFmin) + (5.2 +/- 3.3))sigma(sp), where BSFmin is the minimum BSF, in practice the 1st percentile of BSF data at a site to be analyzed. At the lowest supersaturations of each site (SS approximate to 0 :1 %), the average bias, defined as the ratio of the AOP-derived and measured N-CCN, varied from similar to 0.7 to similar to 1.9 at most sites except at a Himalayan site where the bias was > 4. At SS > 0 :4% the average bias ranged from similar to 0.7 to similar to 1.3 at most sites. For the marine-aerosol-dominated site Ascension Island the bias was higher, similar to 1.4-1.9. In other words, at SS > 0:4% N-CCN was estimated with an average uncertainty of approximately 30% by using nephelometer data. The biases were mainly due to the biases in the parameterization related to the scattering Angstrom exponent (SAE). The squared correlation coefficients between the AOP-derived and measured N-CCN varied from similar to 0.5 to similar to 0.8. To study the physical explanation of the relationships between N-CCN and AOPs, lognormal unimodal particle size distributions were generated and N-CCN and AOPs were calculated. The simulation showed that the relationships of N-CCN and AOPs are affected by the geometric mean diameter and width of the size distribution and the activation diameter. The relationships of N-CCN and AOPs were similar to those of the observed ones. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000503460000001 |
WOS关键词 | YANGTZE-RIVER DELTA ; CCN ACTIVITY ; ACTIVATION PROPERTIES ; HYGROSCOPIC GROWTH ; SMEAR-II ; LIGHT ; SCATTERING ; FRACTION ; REMOTE ; NUCLEATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/224145 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Nanjing Univ, Sch Atmospher Sci, Joint Int Res Lab Atmospher Sci, Nanjing 210023, Jiangsu, Peoples R China; 2.Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res Phys, FIN-00014 Helsinki, Finland; 3.Finnish Meteorol Inst, Atmospher Composit Res, FIN-00101 Helsinki, Finland; 4.Hyytiala Forestry Field Stn, Hyytialantie 124, FI-35500 Korkeakoski, Finland |
推荐引用方式 GB/T 7714 | Shen, Yicheng,Virkkula, Aki,Ding, Aijun,et al. Estimating cloud condensation nuclei number concentrations using aerosol optical properties: role of particle number size distribution and parameterization[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(24):15483-15502. |
APA | Shen, Yicheng.,Virkkula, Aki.,Ding, Aijun.,Luoma, Krista.,Keskinen, Helmi.,...&Kerminen, Veli-Matti.(2019).Estimating cloud condensation nuclei number concentrations using aerosol optical properties: role of particle number size distribution and parameterization.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(24),15483-15502. |
MLA | Shen, Yicheng,et al."Estimating cloud condensation nuclei number concentrations using aerosol optical properties: role of particle number size distribution and parameterization".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.24(2019):15483-15502. |
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